Difficult technical question on ISO & light

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On Mon, 01 Nov 2004 11:19:18 +1300, Colin D
<ColinD@killspam.127.0.0.1> wrote:

>But you come across as putting up every obstacle you can think of to denigrate anything to do
>with computers and digital imaging. In the end, it's your choice. Learn or lose.

Resistance is futile, eh ?

Regards,

John S. Douglas, Photographer - http://www.puresilver.org
Vote "No! for the status quo. Vote 3rd party !!
 
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On Mon, 01 Nov 2004 00:40:17 GMT, Gregory W Blank
<gblank@despamit.net> wrote:

> Stupid in your opinion, does not qualify them as such.

I do wish people would stop denigrating each other. We may
disagree on a lot of things but I think that we can all agree that
respect is the one thing that should not be lost. If that is not the
case then I suggest that those who feel differently stop wasting their
time with us "stupidos".


Regards,

John S. Douglas, Photographer - http://www.puresilver.org
Vote "No! for the status quo. Vote 3rd party !!
 
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William Graham wrote:

> "dj_nme" <dj_nme@hotmail.com> wrote in message
> news:4184951a$0$31908$5a62ac22@per-qv1-newsreader-01.iinet.net.au...
>
>>William Graham wrote:
>>
>>>"Tom Phillips" <nospam777@aol.com> wrote in message
>>>news:418482E4.7DE34413@aol.com...
>>>
>>>
>>>
>>>>Go ahead. try to put a Leica lens on your little digital
>>>>P&S. You'd just be wasting your money all all that good
>>>>quality opitical resolution.
>>>
>>>
>>>Actually, I had the idea of putting an F mount on a point and shoot, so I
>>>could use it with my Nikkors.....It wouldn't be digital, but it might
>>>make a pretty good camera.......
>>
>>The only problem that I found with that aproach is that over 3/4 of the
>>image circle is wasted if it has a 2/3" CCD and the crop facor is about 4
>>(not 1.5 or 1.3 of a real DSLR).
>>Using an adapter (0.25x "zoom factor") in the lens-mount can fix the
>>wasted image cicle and bring the crop factor down to about 2, but I'm not
>>so sure that it is too great as far as distortion or colour smearing is
>>concerned.
>
>
> Yes....I wouldn't do it with a digital P&S, but with a film P&S, it might
> make a pretty interesting camera. Of course, I could only use the older
> non-AF nikkors with it, but it would be nice to have a cheap rangefinder
> camera that would take my nikkor set.......

If you use a film p&s, then what are you going to use for a sensor?

My point is that to get a sensor of reasonable resolution to make the
project financialy worthwhile, the only way to go is to get a digital
p&s and put a lens-mount onto it.
Otherwise, you would be shelling out over $1000 for a DSLR to dismantle
and _maybe_ turn into junk.
Possibly could be done using a Kodak DCS digital back for a Nikon N90x
SLR bought second-hand on ebay, but the only ones I've seen seperately
(and relatively cheaply) are only the low-res DCS 410 (1.5pm, if my
memory is correct) and occasionaly a sysytem of a camera plus higher res
back, like a DCS 510.

Of course, the problem remains of "crop-factor" (or zoom factor) whan
using a any DSLR or other digicam sensor as the basis for a hypothetical
home-made camera.
I think the DCS series have a crop-factor of around 2 times and most
DSLRs have one of about 1.3~1.5 times.
So, all of your lenses would in effect would have their effective focal
length increased by either 1.5, 2 or 4 (for a p&s 2/3" CCD) times
depending on what digicam you use as the base.

I would hope that you are intending to do lots of astro-photography or
photo-safaris that would require long focal length which your home-made
digicam has.
 
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"dj_nme" <dj_nme@hotmail.com> wrote in message
news:41858189$0$31906$5a62ac22@per-qv1-newsreader-01.iinet.net.au...
> William Graham wrote:
>
>> "dj_nme" <dj_nme@hotmail.com> wrote in message
>> news:4184951a$0$31908$5a62ac22@per-qv1-newsreader-01.iinet.net.au...
>>
>>>William Graham wrote:
>>>
>>>>"Tom Phillips" <nospam777@aol.com> wrote in message
>>>>news:418482E4.7DE34413@aol.com...
>>>>
>>>>
>>>>
>>>>>Go ahead. try to put a Leica lens on your little digital
>>>>>P&S. You'd just be wasting your money all all that good
>>>>>quality opitical resolution.
>>>>
>>>>
>>>>Actually, I had the idea of putting an F mount on a point and shoot, so
>>>>I could use it with my Nikkors.....It wouldn't be digital, but it might
>>>>make a pretty good camera.......
>>>
>>>The only problem that I found with that aproach is that over 3/4 of the
>>>image circle is wasted if it has a 2/3" CCD and the crop facor is about 4
>>>(not 1.5 or 1.3 of a real DSLR).
>>>Using an adapter (0.25x "zoom factor") in the lens-mount can fix the
>>>wasted image cicle and bring the crop factor down to about 2, but I'm not
>>>so sure that it is too great as far as distortion or colour smearing is
>>>concerned.
>>
>>
>> Yes....I wouldn't do it with a digital P&S, but with a film P&S, it might
>> make a pretty interesting camera. Of course, I could only use the older
>> non-AF nikkors with it, but it would be nice to have a cheap rangefinder
>> camera that would take my nikkor set.......
>
> If you use a film p&s, then what are you going to use for a sensor?

Film, of course.....I think we are talking about two different things here.
I am sorry now that I jumped into your discussion. I see now that my
statement has just confused you. I was simply commenting on the fact that I
would like a rangefinder camera that would take my Nikkor set, and one way
of doing it would be to find a cheap point & shoot film camera, and tear off
the lens, and mount a Nikon F bayonet mount on it, shimmed the right
distance from the film plane, and then I would be able to put my Nikkors on
it and take pictures..........
 
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John wrote:

> On Sun, 31 Oct 2004 21:21:32 +1300, Colin D
> <ColinD@killspam.127.0.0.1> wrote:
>
> >I get the feeling, from your posts in general, that you
> >know little about either digital photography or computers, but simply are reacting
> >in Luddite fashion to threats to your life-long experience of chemical photography.
>
> Letsee, I've worked with computers off and on since 1980 and
> I'm currently working for the #1 OEM on very technical subjects.
>
> As to DI, I don't care for it at all and have spent just
> enough time with Photoshop and my Fuji FinePix Something-or-other to
> get a decent image for email. Even at the highest setting (6MP) it
> simply doesn't compare with my Nikon FM2 much less my Linhoff 5X7.
>
> And just 26 years experience in chemical photography. A couple
> of years as a lab manager.
>
> Don't be so negative on the Luddites. They had their effects
> which is more than most can say.
>
> >If you delete files in spite of the protections, then you are a moron.
>
> You're preaching to the choir here.
>
> >> Regarding # 3, most digicams don't provide for using different
> >> filenames. If you import a lot of images into your My Pictures
> >> directory you run the risk of over-writing files with the same name.
> >
> >Why do you think we are talking about digicams?
>
> Well I thought we were talking about digital images and the
> cameras used to create them. Digit-cams.
>
> >And why do you equate digital
> >cameras with a P&S, when your chemical photographic remarks refer to large format
> >high quality cameras?
>
> Ummm perhaps it's because the most digi-cams are comparable to
> P&S cameras ?

OK, I get the picture. You have a personal dislike of digital images, and can't drive a
6Mp camera and Photoshop well enough to get even an email-quality image. Ultimately,
it's your choice, if you don't like it, you don't like it. But why publicly denigrate
all things digital? Let it be. Nowhere have I read in this thread anybody putting
down chemical photography. It's all the chemical, old-school types trying to put down
digital. I am simply trying to rebut their incorrect claims. Bang head on brick wall
territory, I think.

Colin
 
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Don't bother defending. Chemical film addicts will all die someday as well
as the technology.

"Colin D" <ColinD@killspam.127.0.0.1> wrote in message
news:4185673A.C45DB3DF@killspam.127.0.0.1...
>
>
> John wrote:
>
> > On Sun, 31 Oct 2004 21:21:32 +1300, Colin D
> > <ColinD@killspam.127.0.0.1> wrote:
> >
> > >I get the feeling, from your posts in general, that you
> > >know little about either digital photography or computers, but simply
are reacting
> > >in Luddite fashion to threats to your life-long experience of chemical
photography.
> >
> > Letsee, I've worked with computers off and on since 1980 and
> > I'm currently working for the #1 OEM on very technical subjects.
> >
> > As to DI, I don't care for it at all and have spent just
> > enough time with Photoshop and my Fuji FinePix Something-or-other to
> > get a decent image for email. Even at the highest setting (6MP) it
> > simply doesn't compare with my Nikon FM2 much less my Linhoff 5X7.
> >
> > And just 26 years experience in chemical photography. A couple
> > of years as a lab manager.
> >
> > Don't be so negative on the Luddites. They had their effects
> > which is more than most can say.
> >
> > >If you delete files in spite of the protections, then you are a moron.
> >
> > You're preaching to the choir here.
> >
> > >> Regarding # 3, most digicams don't provide for using
different
> > >> filenames. If you import a lot of images into your My Pictures
> > >> directory you run the risk of over-writing files with the same name.
> > >
> > >Why do you think we are talking about digicams?
> >
> > Well I thought we were talking about digital images and the
> > cameras used to create them. Digit-cams.
> >
> > >And why do you equate digital
> > >cameras with a P&S, when your chemical photographic remarks refer to
large format
> > >high quality cameras?
> >
> > Ummm perhaps it's because the most digi-cams are comparable to
> > P&S cameras ?
>
> OK, I get the picture. You have a personal dislike of digital images, and
can't drive a
> 6Mp camera and Photoshop well enough to get even an email-quality image.
Ultimately,
> it's your choice, if you don't like it, you don't like it. But why
publicly denigrate
> all things digital? Let it be. Nowhere have I read in this thread
anybody putting
> down chemical photography. It's all the chemical, old-school types trying
to put down
> digital. I am simply trying to rebut their incorrect claims. Bang head
on brick wall
> territory, I think.
>
> Colin
>
 
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On Mon, 01 Nov 2004 11:29:14 +1300, Colin D
<ColinD@killspam.127.0.0.1> wrote:

>OK, I get the picture. You have a personal dislike of digital images, and can't drive a
>6Mp camera and Photoshop well enough to get even an email-quality image. Ultimately,
>it's your choice, if you don't like it, you don't like it. But why publicly denigrate
>all things digital? Let it be. Nowhere have I read in this thread anybody putting
>down chemical photography. It's all the chemical, old-school types trying to put down
>digital. I am simply trying to rebut their incorrect claims. Bang head on brick wall
>territory, I think.

And we see it the other way. Inkjet prints being given slick
names like "giclée" and being touted as archival when it has been
proven time and again not to be. Companies like Dell selling
"All-In-One Photo Printer" and the public eating it up like cats in a
creamery.

Note that most of us are from the rec.photo.darkroom group.
Given that manufacturers like Kodak have been spending billions of
dollars of profits made from film-based products to develop DI (at a
significant loss to date) and simultaneously discontinuing many of the
products that we've come to like and use in our darkrooms. Perhaps in
that context you will understand some of the animosity.

Regards,

John S. Douglas, Photographer - http://www.puresilver.org
Vote "No! for the status quo. Vote 3rd party !!
 
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On Sun, 31 Oct 2004 18:37:14 -0500, "Gymmy Bob" <nospamming@bite.me>
wrote:

>Don't bother defending. Chemical film addicts will all die someday as well
>as the technology.

No doubt. That doesn't mean that there will be suitable
replacements. Probably just mediocrity just as we see in most other
crafts these days. Perhaps some consider darkroom practitioners to be
anachronisms but lets see who has the more valued works on the walls
of galleries.

Regards,

John S. Douglas, Photographer - http://www.puresilver.org
Vote "No! for the status quo. Vote 3rd party !!
 
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Yeah, change and modernization is hard to swallow at that age....LOL

"John" <use_net@puresilver.org> wrote in message
news:419bo0t8jdhbc1jl9a92nsf0l7dl0i25ft@4ax.com...
> On Mon, 01 Nov 2004 11:29:14 +1300, Colin D
> <ColinD@killspam.127.0.0.1> wrote:
>
> >OK, I get the picture. You have a personal dislike of digital images,
and can't drive a
> >6Mp camera and Photoshop well enough to get even an email-quality image.
Ultimately,
> >it's your choice, if you don't like it, you don't like it. But why
publicly denigrate
> >all things digital? Let it be. Nowhere have I read in this thread
anybody putting
> >down chemical photography. It's all the chemical, old-school types
trying to put down
> >digital. I am simply trying to rebut their incorrect claims. Bang head
on brick wall
> >territory, I think.
>
> And we see it the other way. Inkjet prints being given slick
> names like "giclée" and being touted as archival when it has been
> proven time and again not to be. Companies like Dell selling
> "All-In-One Photo Printer" and the public eating it up like cats in a
> creamery.
>
> Note that most of us are from the rec.photo.darkroom group.
> Given that manufacturers like Kodak have been spending billions of
> dollars of profits made from film-based products to develop DI (at a
> significant loss to date) and simultaneously discontinuing many of the
> products that we've come to like and use in our darkrooms. Perhaps in
> that context you will understand some of the animosity.
>
> Regards,
>
> John S. Douglas, Photographer - http://www.puresilver.org
> Vote "No! for the status quo. Vote 3rd party !!
 
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In article <ubednfyRPJbaGBjcRVn-uw@golden.net>,
"Gymmy Bob" <nospamming@bite.me> wrote:

> Don't bother defending. Chemical film addicts will all die someday as well
> as the technology.

I think your trying to make a relative point, you haven't succeeded.
--
LF Website @ http://members.verizon.net/~gregoryblank

"To announce that there must be no criticism of the President,
or that we are to stand by the President, right or wrong,
is not only unpatriotic and servile, but is morally treasonable
to the American public."--Theodore Roosevelt, May 7, 1918
 
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"John" <use_net@puresilver.org> wrote in message
news:419bo0t8jdhbc1jl9a92nsf0l7dl0i25ft@4ax.com...
> On Mon, 01 Nov 2004 11:29:14 +1300, Colin D
> <ColinD@killspam.127.0.0.1> wrote:
>
>>OK, I get the picture. You have a personal dislike of digital images, and
>>can't drive a
>>6Mp camera and Photoshop well enough to get even an email-quality image.
>>Ultimately,
>>it's your choice, if you don't like it, you don't like it. But why
>>publicly denigrate
>>all things digital? Let it be. Nowhere have I read in this thread
>>anybody putting
>>down chemical photography. It's all the chemical, old-school types trying
>>to put down
>>digital. I am simply trying to rebut their incorrect claims. Bang head
>>on brick wall
>>territory, I think.
>
> And we see it the other way. Inkjet prints being given slick
> names like "giclée" and being touted as archival when it has been
> proven time and again not to be. Companies like Dell selling
> "All-In-One Photo Printer" and the public eating it up like cats in a
> creamery.
>
> Note that most of us are from the rec.photo.darkroom group.
> Given that manufacturers like Kodak have been spending billions of
> dollars of profits made from film-based products to develop DI (at a
> significant loss to date) and simultaneously discontinuing many of the
> products that we've come to like and use in our darkrooms. Perhaps in
> that context you will understand some of the animosity.
>
> Regards,
>
> John S. Douglas, Photographer - http://www.puresilver.org
> Vote "No! for the status quo. Vote 3rd party !!

I'm relatively new to this group, so sorry if this has already been asked,
but why are you even on this group John? You obviously think digital is not
photography, yet you proudly announce that you are a "photographer" with
your responses.

Earlier you said "But then my opinion makes more since than believing that
a digital file is a photograph." A digital file is a digital file. When
you display or print it, it is a photograph. I can understand that you are
threatened by digital 'photography', and make all of your strange
statements, but most of the world embraces digital 'photography' and you may
as well get used to the fact that it is going to get more and more and more
popular as time marches on.

Don Dunlap
 
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Antique craftmanship will always hold people in awe. This doesn't mean it
was necessarily better, only people will wonder how the hell somebody could
actually spend that much effort on something despite the primitive
technology.

Despite all the snark, I do agree with larger format chemical film for
quality but that will change some day also. The digitals have made so many
more users and with no brains or experience required...LOL

I believe the 35mm is done. I have a small Pentax unit with 135mm lens on it
that has shot about 8 rolls of film. I got my first $150 digital 1Mp camera
and I have never touched the 35mm again in about 3 years. I never was a big
picture taker but now I am. I can afford it.


"John" <use_net@puresilver.org> wrote in message
news:l0bbo055foagejv1v4ldfg82vrjdfqdmv4@4ax.com...
> On Sun, 31 Oct 2004 18:37:14 -0500, "Gymmy Bob" <nospamming@bite.me>
> wrote:
>
> >Don't bother defending. Chemical film addicts will all die someday as
well
> >as the technology.
>
> No doubt. That doesn't mean that there will be suitable
> replacements. Probably just mediocrity just as we see in most other
> crafts these days. Perhaps some consider darkroom practitioners to be
> anachronisms but lets see who has the more valued works on the walls
> of galleries.
>
> Regards,
>
> John S. Douglas, Photographer - http://www.puresilver.org
> Vote "No! for the status quo. Vote 3rd party !!
 
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On Sun, 31 Oct 2004 22:27:58 -0500, "Gymmy Bob" <nospamming@bite.me>
wrote:

>Yeah, change and modernization is hard to swallow at that age....LOL

Ad hominem. You loose !


Regards,

John S. Douglas, Photographer - http://www.puresilver.org
Vote "No! for the status quo. Vote 3rd party !!
 
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John wrote:
> On Sun, 31 Oct 2004 18:37:14 -0500, "Gymmy Bob" <nospamming@bite.me>
> wrote:
>
>
>>Don't bother defending. Chemical film addicts will all die someday as well
>>as the technology.
>
>
> No doubt. That doesn't mean that there will be suitable
> replacements. Probably just mediocrity just as we see in most other
> crafts these days. Perhaps some consider darkroom practitioners to be
> anachronisms but lets see who has the more valued works on the walls
> of galleries.
>


I think it comes down to what you want to do with the resulting image, a
newspaper photographer wants results as quickly as possible, they can
easily shoot digital, hook the laptop to the cell-phone, dialup the
editor and file the story. Studio photographers wanting to test
lighting setups can use digital to check their lighting, again on the
computer. If he were alive today, even Ansel Adams would probably keep
a digital camera around, to check results. For Joe average who takes 20
shots a year, shooting on digital and then printing at the local drug
store is going to be fine.

If your doing artistic work or like doing AgBr printing in the darkroom,
or want negatives that are around after your dead then shoot film.

This isn't an either or people, both processes have their uses, each has
it's good points, and it's bad points. In some ways the removal of
the consumer market allows traditional film manufacturers to produce
more interesting films that film shooters are interested in, that J.A.
doesn't care about.

W
 
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On Mon, 1 Nov 2004 04:51:55 -0500, "DDDD" <someone@some.one> wrote:

>I'm relatively new to this group, so sorry if this has already been asked,
>but why are you even on this group John?

LOL ! You do realize that this thread is crossposted to :

alt.comp.periphs.dcameras
rec.photo.digital
rec.photo.equipment.35mm
rec.photo.film+labs
rec.photo.darkroom

Regards,

John S. Douglas, Photographer - http://www.puresilver.org
Vote "No! for the status quo. Vote 3rd party !!
 
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On Sun, 31 Oct 2004 22:37:20 -0500, "Gymmy Bob" <nospamming@bite.me>
wrote:

> I never was a big
>picture taker but now I am. I can afford it.

You see right there is the difference. You are a "picture
taker". I am a photographer.

Regards,

John S. Douglas, Photographer - http://www.puresilver.org
Vote "No! for the status quo. Vote 3rd party !!
 
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While the current crop of digital cameras can hold their own against 35mm they
have a long way to go before they can produce the image quality of a well printed
4x5 or larger negative.


In rec.photo.darkroom Gymmy Bob <nospamming@bite.me> wrote:
: Antique craftmanship will always hold people in awe. This doesn't mean it
: was necessarily better, only people will wonder how the hell somebody could
: actually spend that much effort on something despite the primitive
: technology.

: Despite all the snark, I do agree with larger format chemical film for
: quality but that will change some day also. The digitals have made so many
: more users and with no brains or experience required...LOL

: I believe the 35mm is done. I have a small Pentax unit with 135mm lens on it
: that has shot about 8 rolls of film. I got my first $150 digital 1Mp camera
: and I have never touched the 35mm again in about 3 years. I never was a big
: picture taker but now I am. I can afford it.


: "John" <use_net@puresilver.org> wrote in message
: news:l0bbo055foagejv1v4ldfg82vrjdfqdmv4@4ax.com...
: > On Sun, 31 Oct 2004 18:37:14 -0500, "Gymmy Bob" <nospamming@bite.me>
: > wrote:
: >
: > >Don't bother defending. Chemical film addicts will all die someday as
: well
: > >as the technology.
: >
: > No doubt. That doesn't mean that there will be suitable
: > replacements. Probably just mediocrity just as we see in most other
: > crafts these days. Perhaps some consider darkroom practitioners to be
: > anachronisms but lets see who has the more valued works on the walls
: > of galleries.
: >
: > Regards,
: >
: > John S. Douglas, Photographer - http://www.puresilver.org
: > Vote "No! for the status quo. Vote 3rd party !!



--




Keep working millions on welfare depend on you
-------------------
fwp@deepthought.com
 
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"Frank Pittel" <fwp@warlock.deepthought.com> wrote in message
news:76OdnQfH5bIrQRjcRVn-hg@giganews.com...
> In rec.photo.darkroom Gregory W Blank <gblank@despamit.net> wrote:
> : In article <bcidndMvCshfGRjcRVn-3Q@golden.net>,
> : "Gymmy Bob" <nospamming@bite.me> wrote:
>
> : > When was the last time you went to a party and shot 200 frames just
for fun
> : > with your chemical film antique?
> : >
> : > Why not?
>
> : I've never shot 200 frames for the fun of it, ever.
>
> : > Do you carry your 2.25^2 camera with you at work, to parties, to the
> : > theatre?
> : >
> : > Why not?
>
> : Because I have 4- 35mm cameras that do the job better, that is less
> : conspicuously.
>
> : > Can you go and play catch with the kids with your chemical film
camera?
> : >
> : > Why not?
>
> : You play catch with your camera? The cost of film and processing has
never
> : bothered me because I have always practiced something called restraint.
> : You might try it sometime 🙂
>
> It may be that I shoot LF 95+% of the time but I never understood why
people
> brag about how many photos they took in a given time period. I remember
talking
> to a co-worker a couple of years ago when he bragged about having to take
three
> hundred photos at a party to get one good one. He didn't answer when I
asked why
> he didn't just take the one good and not take the bad ones. 🙂

I'm with you Frank. With digital you record everything and discard nothing.
It does make hard drive manufacturers happy! ;-)
me
 
Archived from groups: alt.comp.periphs.dcameras,rec.photo.digital,rec.photo.equipment.35mm,rec.photo.film+labs,rec.photo.darkroom (More info?)

In article <bnihd.3162$zx1.1848@newssvr13.news.prodigy.com>,
Mike Russell <REgeigyMOVE@pacbellTHIS.net> wrote:
>Chris Brown wrote:
>
>How about your computer room? It it's like mine, it has a couple dozen tiny
>LED's that should give an interesting lighting effect.

That's worth a try. I'll see what happens.

>Or re-do your (very impressive) 15 minute exposure, but at a smaller
>aperture, or with an ND filter?

You are too kind (although it was 30 minutes). 🙂 However, I won't get the
opportunity to redo that one for some time, as I'm currently several
thousand miles away from where it was taken. ;-)
 
Archived from groups: alt.comp.periphs.dcameras,rec.photo.digital,rec.photo.equipment.35mm,rec.photo.film+labs,rec.photo.darkroom (More info?)

"David Nebenzahl" <nobody@but.us.chickens> wrote in message
news:4185A69C.1050407@but.us.chickens...
Your opposition seems to come from folks who just don't
> *like* digital and don't like the idea that it is about to supplant
> traditional wet photography.

In your not so humble opinion! What a hot steamy load of unmittigated shyte
(IMO)!

> I should state my own prejudices up front: I don't particularly care for
> digital myself, which should make my arguments (as a devil's advocate, as
it
> were) more believable.

No it does not.

> Don't know if it'll be a decade or sooner, but it's inevitable that
> digital is going to swamp everything else.

If you chose to abandon quality and integrity in favor of cheap and fast you
may do so but I do not!

> And the anti-digital crowd never admits the point you made, that one
> can make infinite copies of a digital image with no degradation in
quality,
> unlike optical images.

The question is not the number of copies but the *quality* of the work. But
please do continue to make as many copies as you like with my blessing.

> I'm sure I'll regret posting this soon enough.

You may begin regretting right now!

> ... voting for John Kerry now is like voting for LBJ in 1964 with full
> precognition of what he was going to do in Vietnam for the next four
years.
>
> - Alexander Cockburn in _Counterpunch_
> (http://counterpunch.org/cockburn10282004.html)

And what kind OT rebublician shyte is that? Spare us! I will vote for John
Kerry and save you from GWB!
Have a Nice Day
me
 
Archived from groups: alt.comp.periphs.dcameras,rec.photo.digital,rec.photo.equipment.35mm,rec.photo.film+labs,rec.photo.darkroom (More info?)

"David J. Littleboy" wrote:
>
> "Tom Phillips" <nospam777@aol.com> wrote:
> > Dave Martindale wrote:
> > > Tom Phillips <nospam777@aol.com> writes:
> > >
> > > >Let's keep things in pragmatic context here. MTF is the
> > > >ability of the _entire_ imaging system to resolve detail:
> > > >imager, optics, etc.
>
> If this were correct, then neither Canon nor Zeiss (in their lens specs) nor
> Fuji nor Kodak (in their film specs), would provide MTF charts. But,
> surprise:
> they all do.

Well once again you only show how little you know...


> >> > Nyquist limits the entire digital
> > > >system. Nyquist does not affect film or film optics.
> > >
> > > >That's a scientific fact.
> > >
> > > It's an irrelevant fact.
> >
> > You're an idiot. It's the _most_ relevant fact in
> > digital resolving abilities. If it weren't, there would
> > be no need to have as many pixles (photodetector sites)
> > as possible on a silicon sensor. Or in a scanner.
>
> It's irrelevant because it doesn't tell you what you need to know, namely
> the lp/mm at 50% and 10% MTF.
>
> Again, your blind faith in film is based on a mistaken belief that than an
> MTF of 10% or lower is useful for pictorial imaging: it's not. In actual
> use, for the same size sensor area, film is pitiful in comparison to
> digital. Full-frame 35mm film, even the best films around, is only slightly
> better than 6MP digital which has less than 40% of the area.
>
> > Go ahead. try to put a Leica lens on your little digital
> > P&S. You'd just be wasting your money all all that good
> > quality opitical resolution.
>
> Quite the contrary: the digital P&S camera lenses have a far higher 50%MTF
> resolution than Leica lenses. The Sony and Canon P&S lenses provide MTFs at
> 100 lp/mm that Leica can only dream of at 50 lp/mm.
>
> Try making an A4 print from an 6.6 x 8.8 mm area of film: it would be a
> horrendously pitiful joke. Yet the 2/3" P&S cameras make lovely A4s.
>
> David J. Littleboy
> Tokyo, Japan
 
Archived from groups: alt.comp.periphs.dcameras,rec.photo.digital,rec.photo.equipment.35mm,rec.photo.film+labs,rec.photo.darkroom (More info?)

JPS@no.komm wrote:
>
> In message <418482E4.7DE34413@aol.com>,
> Tom Phillips <nospam777@aol.com> wrote:
>
> >Gop ahead. try to put a Leica lens on your little digital
> >P&S. You'd just be wasting your money all all that good
> >quality opitical resolution.
>
> Optical resolution is not a brick wall. The contrast drops as you move
> to higher frequencies. If the sensor in a digital camera has a proper
> anti-aliasing filter in it, there is no such thing as a lens that is too
> sharp,

Well, I agree. In that case you simply have a dumbed down
lens and it doesn't matter...


> and the contrast, pixel-to-pixel, will be higher than it would be
> with a softer lens, even if both can provide at least some contrast at
> the nyquist.
> --
>
> <>>< ><<> ><<> <>>< ><<> <>>< <>>< ><<>
> John P Sheehy <JPS@no.komm>
> ><<> <>>< <>>< ><<> <>>< ><<> ><<> <>><
 
Archived from groups: alt.comp.periphs.dcameras,rec.photo.digital,rec.photo.equipment.35mm,rec.photo.film+labs,rec.photo.darkroom (More info?)

JPS@no.komm wrote:
>
> In message <41847F73.7CAC2C2B@aol.com>,
> Tom Phillips <nospam777@aol.com> wrote:
>
> >Foveon 3D requires a much larger pixel to do what it does. It's
> >an improvent in digital color over bayer pattern color filter
> >arrays,
>
> No, it's a technological farce. The color separation is poor, and it is
> unable to deliver the color accuracy it promises. Rather than having a
> neat set of three over-lapping bell curves for the three layers'
> response to color, it has three weird shapes and the area between green
> and blue have overlapping curves with almost no slope to them, so the
> resolution of blue vs green is very flaky and the smallest
> inconsistencies in doping cause huge blotches of off-color to appear in
> skies and seas. It also seems very difficult to get skin colors right
> if the rest of the image is porperly white-balanced.

I won't argue. Foveon has rarely been able to back up
it's marketing claims...

> >which reduce actual color pixels captured by 1/4 and
> >interpolate the rest (amazing how little some of you seem
> >to know about how digital works...),
>
> Have you ever actually taken an image that had full RGB sampling per
> pixel, and pixellated the hue channel, or given it a 2-pixel-radius
> blur? Unless you zoomed in so that each pixel in the image was several
> pixels high and wide, you would not see a difference A/B-ing between the
> original and the color-blurred image. Human color resolution is *way*
> below its luminance resolution.

Ah, the mediocrity factor...

> Bayer is not as good as full RGB sampling at the same resolution, for
> scientific imaging purposes, but for photography, it sacrifices very
> little (unless you like to make mosaics from your pixels).

It has to do with more than resolution. Film is 3
dimensional RGB and that does make a difference.
A 3-shot or trilinear scan also makes a difference
in pictorial imaging.

> >but not an improvement
> >in resolution. Unless Foveon somehow suspended the laws of
> >physics (e.g., Nyquist.)
>
> Sigma tried to suspend the nyquist issues, by releasing two DSLRs using
> the Foveon chip without an anti-aliasing filter. The first one didn't
> even have microlenses, to capture light falling outside of the well
> boundaries. The result is horrible aliasing effects on the original
> (SD9), and moderate aliasing artifacts on the next model (SD10).
>
> <>>< ><<> ><<> <>>< ><<> <>>< <>>< ><<>
> John P Sheehy <JPS@no.komm>
> ><<> <>>< <>>< ><<> <>>< ><<> ><<> <>><
 
Archived from groups: alt.comp.periphs.dcameras,rec.photo.digital,rec.photo.equipment.35mm,rec.photo.film+labs,rec.photo.darkroom (More info?)

David Nebenzahl wrote:
>
> On 10/31/2004 1:10 AM Colin D spake thus:
>
> > Tom Phillips wrote:
> >
> >> John wrote:
> >> >
> >> > On Sun, 31 Oct 2004 12:37:06 +1300, Colin D <ColinD@killspam.127.0.0.1> wrote:
> >> >
> >> > >Where does he store his negatives, I wonder? What if the place burns down? Of
> >> > >course digital backups cost - but dupe negs cost more, and they lose quality,
> >> > >which digital doesn't.
> >>
> >> Frankly and even realistically, I could store my negatives
> >> in a cave (cold dark storage with stable relative humidity)
> >> and they would last a thousands years longer than any
> >> electronic storage medium.
> >
> > Jeez, you don't know when you are beaten, do you? You *might* store your negs as
> > above, but the question is do you? No, I thought not. So your statement is worth
> > nothing. Further, a cave might have a stable humidity, but is it optimum? Don't
> > know? Thought not. Your negs will last more than a thousand years (digital storage
> > lifetime plus 1,000 years)? On acetate? no chance. On glass, maybe. You'll at least
> > have the glass, even if the emulsion has long gone.
> >
> >> A bird in the hand is worth any bunch of 1's and 0's
> >> that don;t really exist...
> >
> > What?

What? What? What? ????

Is that all you can incredulously say? Pay attention and use
your gray matter and _think_:

1's and 0's are binary code, i.e., an abstraction used
to represent something else. What they represent doesn't
really exist, as in actual photographs and images on your
hard drive. Not there, representational, virtual, it's *data.*

Your _hard drive_ isn't a photograph. NOw, what's so hard
to understand about that, what? (as the british say.)

> cause you can't see or feel them, they don't exist? A 1 or a 0, as you put
> > it, is really the state, or polarisation, of a tiny magnetic field in a magnetic
> > material that exhibits high coercivity and hence remanence, which to the uninitiated
> > means simply that the magnetic polarisation is very stable. New materials are being
> > developed that promise to have much geater life than current, and may well have a
> > stable life measured in hundreds if not thousands of years. Your statement is based
> > on ignorance and, I suspect, a degree of desperation that you might be forced to
> > reckon with digital imaging against your will.
>
> I've been watching this debate unfold for a while now, and I have to say that
> you (Colin) are right. Your opposition seems to come from folks who just don't
> *like* digital and don't like the idea that it is about to supplant
> traditional wet photography.

1's and 0's are not images. They are binary code
that software reads and uses to represent an
image. The ISO says so...

Now, no one could accuse the ISO of not liking
digital. They write the standards for all digital
cameras. Course David just doesn't understand
abstract matters very well, even one as simple
as "there's no photograph because silicon doesn't
record images, it produces photoelectric data..."

***FILM*** doesn't produce data, photoelectrons, a
voltage, or digital signals. It actually creates a
real, tangible, physical photograph. Nothing
representational at all.

>
> I should state my own prejudices up front: I don't particularly care for
> digital myself, which should make my arguments (as a devil's advocate, as it
> were) more believable. However, I'm sane enough to read the handwriting on the
> wall. Don't know if it'll be a decade or sooner, but it's inevitable that
> digital is going to swamp everything else. Just like the fact that practically
> nobody prints from lead type anymore (outside of a few boutique printers).
>
> By the way, it's interesting to note how this discussion has become distorted

The only thing distorted here is your understanding
and ability to understand the simple concepts about
what these two very different processes produce and
don;t produce.

> and people are no longer arguing the original premise. Pointing out the
> problems of digital image storage and retrieval in no way proves that digital
> photography is not "photography", nor does it prove either one superior to the
> other. And the anti-digital crowd never admits the point you made, that one
> can make infinite copies of a digital image with no degradation in quality,
> unlike optical images.
>
> I'm sure I'll regret posting this soon enough.

Well hey, at least you don't have to crosspost to get
attention, since it's already crossposted.
 
Archived from groups: alt.comp.periphs.dcameras,rec.photo.digital,rec.photo.equipment.35mm,rec.photo.film+labs,rec.photo.darkroom (More info?)

On Mon, 1 Nov 2004 11:46:32 -0600, "me" <anonymous@_.com> wrote:

>I'm with you Frank. With digital you record everything and discard nothing.
>It does make hard drive manufacturers happy! ;-)

http://www.bestbargainpc.com/hii40seata1e.html

Just get four of those monsters and run them in a 0+1 RAID.

Regards,

John S. Douglas, Photographer - http://www.puresilver.org
Vote "No! for the status quo. Vote 3rd party !!