Difficult technical question on ISO & light

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On Mon, 01 Nov 2004 14:26:55 -0700, Tom Phillips <nospam777@aol.com>
wrote:

>
>
>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.*

Just the same as the light-altered grains in your emulsion.
The negative image on your film, especially before developing, is no
more substantial than the 1/0s.

>
>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.
 
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In rec.photo.darkroom Tom Phillips <nospam777@aol.com> wrote:


: John wrote:
: >
: > On Mon, 01 Nov 2004 20:07:21 -0700, Tom Phillips <nospam777@aol.com>
: > wrote:
: >
: > >
: > >give it a rest.
: >
: > Please ?

: PLeeease, I really want to kill this thread!

Why?? All you're going to do is restart the flame in another thread.
--




Keep working millions on welfare depend on you
-------------------
fwp@deepthought.com
 
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Frank Pittel wrote:
>
> In rec.photo.darkroom Tom Phillips <nospam777@aol.com> wrote:
>
> : John wrote:
> : >
> : > On Mon, 01 Nov 2004 20:07:21 -0700, Tom Phillips <nospam777@aol.com>
> : > wrote:
> : >
> : > >
> : > >give it a rest.
> : >
> : > Please ?
>
> : PLeeease, I really want to kill this thread!
>
> Why?? All you're going to do is restart the flame in another thread.

No, I won't. I promise 😉
 
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In article <BDAC43CC.3A5D1%chris.woodhouse@zetnet.co.uk>,
Christopher Woodhouse <chris.woodhouse@zetnet.co.uk> wrote:

> For fine art work I am
> assuming that the eye can resolve 1 minute of arc (as a guideline) and my
> research was an exploration of the limits of digital cameras vs scanning
> primarily MF film.

1 minute at 10 feet, 100 feet or 1000 ? ;-)

> You CAN put shadow detail into slide films by using a small amount of
> pre-exposure, much in the same way as Adams did for monofilm. Precisely
> done, it can lift shadow detail slightly.

Good point. I've had some success pulling slide films after over exposure of about
1/2 stop, supposedly you can pull up to 2 stops.
--
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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In article <O_xhd.278$Oh1.244@newsfe1-gui.ntli.net>,
"Harvey" <harvey@not.ntlworld.com> wrote:

> [snip]
> > ***FILM*** doesn't produce data, photoelectrons, a
> > voltage, or digital signals. It actually creates a
> > real, tangible, physical photograph. Nothing
> > representational at all.
>
> Last time I checked ***FILM*** actually holds a latent image that needs to
> be developed chemically to produce **a representation** of the original
> image. Or are you suggesting that the silver halides actually hold some
> metaphysical part of the image?

Everything found in the world is representational otherwise it ceases
or never did exist. :-(
--
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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In article <74ddo01ce9shp0tlpupiig45v30im0veqb@4ax.com>, JPS@no.komm
wrote:

>
> We've had plenty of time to discover Cartier-Bresson's photos. We've
> had almost no time to discover digital gems. Art often takes a long
> time to be recognized.

With regard to digital;

About as long as some archivist to push the delete key.
No evidence.
--
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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In article <nafdo0d6uv82qjvf33ah7knmff1t3jtnft@4ax.com>,
kashe@sonic.net wrote:
> >
> >I've always looked at my prints as being individual works art. No two are the
> >same.
>
> Poor quality control?

Yeah like the kind that has produced the great works of art through
history, The Word is "UNIQUE" something the Borg wouldn't
understand, also an effective weapon.

There is no perfection, meerly unlimited imperfection.
--
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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On Mon, 01 Nov 2004 22:43:52 -0700, Tom Phillips <nospam777@aol.com>
wrote:

>> >give it a rest.
>>
>> Please ?
>
>PLeeease, I really want to kill this thread!

OK, if you insist !

Thanks to all the digital enthusiast for the info. You're
welcome to come over to the dark(room) side anytime.

Regards,

John S. Douglas, Photographer - http://www.puresilver.org
Vote "No! for the status quo. Vote 3rd party !!
 
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In article <vOadnWHVH7imWhvcRVn-1w@golden.net>,
"Gymmy Bob" <nospamming@bite.me> wrote:

> I guess he's somebody important. I have bever heard of him. I only want to
> capture things on storage mmedium not have to train for years to get one
> picture.
>
> Besides, I have seen you so-called professionals take 20 and 30 rolls of
> film at event to get one prize winner. The difference is with digital it
> doesn't cost us an arm and a leg to do it. I have money to waste on other
> toys.

I personally know maybe a handfull of people that shoot that
much film, I personally have gotten "winners" while doing other
work, seldom specifically setting out to make a winner. Although that
has happened as well. Although it was around five frames instead of
the 720 you think is needed. Oh I won a 700 dollar camera with that
one so my profit margin was well over 100% of money outlaid.

Your jealous and making excuses for not being serious.
Its not a waste if it produces the desire outcome and the profit
outweighs the expense.
--
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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Just out of curiousity what backwoods part of the country
are you posting from. Or is it a trailer park.

In article <_MedncZN8fOyVBvcRVn-qA@golden.net>,
"Gymmy Bob" <nospamming@bite.me> wrote:

> Oh I agree, they have a long way to go. They will probably surpass them no
> sooner than Jan 2005 though...LOL
--
LOL!!!
 
Archived from groups: alt.comp.periphs.dcameras,rec.photo.digital,rec.photo.equipment.35mm,rec.photo.film+labs,rec.photo.darkroom (More info?)

I'm thinking he comes from a family that's spent the last two hundred years practicing
an aggressive inbreeding policy.


In rec.photo.darkroom Udie Lafing <SPAM_@uce.gov> wrote:
: Just out of curiousity what backwoods part of the country
: are you posting from. Or is it a trailer park.

: In article <_MedncZN8fOyVBvcRVn-qA@golden.net>,
: "Gymmy Bob" <nospamming@bite.me> wrote:

: > Oh I agree, they have a long way to go. They will probably surpass them no
: > sooner than Jan 2005 though...LOL
: --
: LOL!!!

--




Keep working millions on welfare depend on you
-------------------
fwp@deepthought.com
 
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Udie Lafing wrote:
>
> Just out of curiousity what backwoods part of the country
> are you posting from. Or is it a trailer park.


<chuckling> 🙂

> In article <_MedncZN8fOyVBvcRVn-qA@golden.net>,
> "Gymmy Bob" <nospamming@bite.me> wrote:
>
> > Oh I agree, they have a long way to go. They will probably surpass them no
> > sooner than Jan 2005 though...LOL
> --
> LOL!!!
 
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In article <d3c57e81.0411011557.69918646@posting.google.com>,
eawckyegcy@yahoo.com wrote:

> Gregory W Blank <gblank@despamit.net> wrote:
>
> > Digital copying certainly presents a very viscous ball of wax in
> > terms of art in general- that is regarding worth and copyright,
> > if your vision is the selling point unlimited copies sort of
> > cheapens your value doncha think.
>
> It only cheapens it with respect to archaic, artifact-based
> distribution systems. There are ways to profit in an economy where
> the cost of making a copy is essentially zero. Of course, you aren't
> hearing much about this because the Dominant Paradigm's cadre of
> lawyers and myopic clientel are still being dragged, kicking and
> screaming, from the 19th to the 21st century.

So why not enlighten us, instead of being pragmatic.
--
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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"Tom Phillips" <nospam777@aol.com> wrote in message
news:4186D29F.1843CDC0@aol.com...
>
>
> Harvey wrote:
>>
>> [snip]
>> > ***FILM*** doesn't produce data, photoelectrons, a
>> > voltage, or digital signals. It actually creates a
>> > real, tangible, physical photograph. Nothing
>> > representational at all.
>>
>> Last time I checked ***FILM*** actually holds a latent image that needs
>> to
>> be developed chemically to produce **a representation** of the original
>> image. Or are you suggesting that the silver halides actually hold some
>> metaphysical part of the image?
>
> WHY do people say such things without thinking first?
>
> The image is created upon exposure to light, through
> chemical decomposition. The chemical change to silver
> is already there. A "latent" image is a chemical image.

Last time I took a film out of a camera and looked at it I couldn't see any
image......

> It's not data representing an image.

In the same sense that film contains a chemical change 'representing an
image' ?
 
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Harvey wrote:
>
> "Tom Phillips" <nospam777@aol.com> wrote in message
> news:4186D29F.1843CDC0@aol.com...
> >
> >
> > Harvey wrote:
> >>
> >> [snip]
> >> > ***FILM*** doesn't produce data, photoelectrons, a
> >> > voltage, or digital signals. It actually creates a
> >> > real, tangible, physical photograph. Nothing
> >> > representational at all.
> >>
> >> Last time I checked ***FILM*** actually holds a latent image that needs
> >> to
> >> be developed chemically to produce **a representation** of the original
> >> image. Or are you suggesting that the silver halides actually hold some
> >> metaphysical part of the image?
> >
> > WHY do people say such things without thinking first?
> >
> > The image is created upon exposure to light, through
> > chemical decomposition. The chemical change to silver
> > is already there. A "latent" image is a chemical image.
>
> Last time I took a film out of a camera and looked at it I couldn't see any
> image......

Not surprising, since you also lack an understanding of
the physics involved...

> > It's not data representing an image.
>
> In the same sense that film contains a chemical change 'representing an
> image' ?

Photolysis begins before development, upon exposure.
I.e., image formation....

You don't need glasses to see it, you need a brain...
 
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In article <QqSdnexVxq7IThvcRVn-oA@golden.net>,
"Gymmy Bob" <nospamming@bite.me> wrote:

> My pictures have no grain and I don't have to pollute the environment with
> chemicals to print them.

Beep wrong answer!!! Digital photography is way way more costly
to the environment than film will ever be. Most chemicals for film
processing are biologically sound or can readily be made so with proper
care. Producers of Printed circuit boards are some of
the worst enviromental offenders in existance & coupled with the lbs of lead in that
key board your sharing your "knowledge" with 🙂 , you haven't a leg to stand on.
--
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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In rec.photo.darkroom Gregory W Blank <gblank@despamit.net> wrote:
: In article <QqSdnexVxq7IThvcRVn-oA@golden.net>,
: "Gymmy Bob" <nospamming@bite.me> wrote:
:
: > My pictures have no grain and I don't have to pollute the environment with
: > chemicals to print them.

: Beep wrong answer!!! Digital photography is way way more costly
: to the environment than film will ever be. Most chemicals for film
: processing are biologically sound or can readily be made so with proper
: care. Producers of Printed circuit boards are some of
: the worst enviromental offenders in existance & coupled with the lbs of lead in that
: key board your sharing your "knowledge" with 🙂 , you haven't a leg to stand on.

The chemicals involved in making the semiconductors make the ferric chloride used for
the PC boards look enviro friendly.
--




Keep working millions on welfare depend on you
-------------------
fwp@deepthought.com
 
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Take the PCB out of your camera and see what it does then.

"Frank Pittel" <fwp@warlock.deepthought.com> wrote in message
news:9eqdnTRxYKXLcRvcRVn-3w@giganews.com...
> In rec.photo.darkroom Gregory W Blank <gblank@despamit.net> wrote:
> : In article <QqSdnexVxq7IThvcRVn-oA@golden.net>,
> : "Gymmy Bob" <nospamming@bite.me> wrote:
> :
> : > My pictures have no grain and I don't have to pollute the environment
with
> : > chemicals to print them.
>
> : Beep wrong answer!!! Digital photography is way way more costly
> : to the environment than film will ever be. Most chemicals for film
> : processing are biologically sound or can readily be made so with proper
> : care. Producers of Printed circuit boards are some of
> : the worst enviromental offenders in existance & coupled with the lbs of
lead in that
> : key board your sharing your "knowledge" with 🙂 , you haven't a leg to
stand on.
>
> The chemicals involved in making the semiconductors make the ferric
chloride used for
> the PC boards look enviro friendly.
> --
>
>
>
>
> Keep working millions on welfare depend on you
> -------------------
> fwp@deepthought.com
 
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In rec.photo.darkroom Gymmy Bob <nospamming@bite.me> wrote:
: Take the PCB out of your camera and see what it does then.

My cameras work find without any PCBs. No electronics of any kind.


: "Frank Pittel" <fwp@warlock.deepthought.com> wrote in message
: news:9eqdnTRxYKXLcRvcRVn-3w@giganews.com...
: > In rec.photo.darkroom Gregory W Blank <gblank@despamit.net> wrote:
: > : In article <QqSdnexVxq7IThvcRVn-oA@golden.net>,
: > : "Gymmy Bob" <nospamming@bite.me> wrote:
: > :
: > : > My pictures have no grain and I don't have to pollute the environment
: with
: > : > chemicals to print them.
: >
: > : Beep wrong answer!!! Digital photography is way way more costly
: > : to the environment than film will ever be. Most chemicals for film
: > : processing are biologically sound or can readily be made so with proper
: > : care. Producers of Printed circuit boards are some of
: > : the worst enviromental offenders in existance & coupled with the lbs of
: lead in that
: > : key board your sharing your "knowledge" with 🙂 , you haven't a leg to
: stand on.
: >
: > The chemicals involved in making the semiconductors make the ferric
: chloride used for
: > the PC boards look enviro friendly.
: > --
: >
: >
: >
: >
: > Keep working millions on welfare depend on you
: > -------------------
: > fwp@deepthought.com



--




Keep working millions on welfare depend on you
-------------------
fwp@deepthought.com
 
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In article <W9-dnXinJ7NYShvcRVn-iQ@giganews.com>,
Frank Pittel <fwp@warlock.deepthought.com> wrote:

> an aggressive inbreeding policy.

Hey ;

That's what Arkansas insurance agents sell 🙂
--
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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In rec.photo.darkroom Gregory W Blank <gblank@despamit.net> wrote:
: In article <W9-dnXinJ7NYShvcRVn-iQ@giganews.com>,
: Frank Pittel <fwp@warlock.deepthought.com> wrote:

: > an aggressive inbreeding policy.

: Hey ;

: That's what Arkansas insurance agents sell 🙂

My father retired to northern Arkansas and I've met some Arkansas natives that
would be able to cash in on that policy. 🙂
--




Keep working millions on welfare depend on you
-------------------
fwp@deepthought.com
 
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"Tom Phillips" <nospam777@aol.com> wrote in message
news:4186E240.D2811267@aol.com...
>
>
> Frank Pittel wrote:
>>
>> In rec.photo.darkroom Tom Phillips <nospam777@aol.com> wrote:
>>
>> : Alan Browne wrote:
>> : >
>> : > John wrote:
>> : >
>> : > > Nope. The human eye is an analog mechanism. Photography is an
>> : > > effort to capture what the eyes can see in a relatively permanent
>> : > > medium. Digital is an effort to make money. Digital images are not
>> : > > analog nor are they permanent. It follows that digital is NOT
>> : > > photography.
>> : >
>> : > One of the stupidest statements lately seen.
>> : >
>>
>> : Actually John is correct. The human eye perceives light
>> : and objects that reflect light _non-linearly_, the same
>> : as film and photochemical imaging. These compliment
>> : each other.
>>
>> : Digital is inherently linear.
>>
>> You may want to take a look at the response curve of the sensors.
>
> The whole point of gamma correction is to get things "linear."
> OTOH, when an image gets to the typical uncorrected computer
> monitor it's really screwed up...
>
> _FILM_ records light very close to the way the human eye
> actually sees it. No gamma corection required...

....assuming you totally ignore high / low contrast development, lith film...
etc. etc.etc...
 
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Harvey wrote:
>
> "Tom Phillips" <nospam777@aol.com> wrote in message
> news:4186E240.D2811267@aol.com...
> >
> >
> > Frank Pittel wrote:
> >>
> >> In rec.photo.darkroom Tom Phillips <nospam777@aol.com> wrote:
> >>
> >> : Alan Browne wrote:
> >> : >
> >> : > John wrote:
> >> : >
> >> : > > Nope. The human eye is an analog mechanism. Photography is an
> >> : > > effort to capture what the eyes can see in a relatively permanent
> >> : > > medium. Digital is an effort to make money. Digital images are not
> >> : > > analog nor are they permanent. It follows that digital is NOT
> >> : > > photography.
> >> : >
> >> : > One of the stupidest statements lately seen.
> >> : >
> >>
> >> : Actually John is correct. The human eye perceives light
> >> : and objects that reflect light _non-linearly_, the same
> >> : as film and photochemical imaging. These compliment
> >> : each other.
> >>
> >> : Digital is inherently linear.
> >>
> >> You may want to take a look at the response curve of the sensors.
> >
> > The whole point of gamma correction is to get things "linear."
> > OTOH, when an image gets to the typical uncorrected computer
> > monitor it's really screwed up...
> >
> > _FILM_ records light very close to the way the human eye
> > actually sees it. No gamma corection required...
>
> ...assuming you totally ignore high / low contrast development, lith film...
> etc. etc.etc...

Gamma "correction" applies only to computer monitors. Or TV
monitors. Not films. There is no etc. etc. etc. You don't
apply gamma correction. Stop saying stupid things...

Anyone (who knows anything about photography, that is), can
take *any* HC film and get a normal nonlinear contrast range
out of it. regardless of development, the curve shape in
inherently similar...
 
Archived from groups: alt.comp.periphs.dcameras,rec.photo.digital,rec.photo.equipment.35mm,rec.photo.film+labs,rec.photo.darkroom (More info?)

In rec.photo.darkroom Harvey <harvey@not.ntlworld.com> wrote:

: "Tom Phillips" <nospam777@aol.com> wrote in message
: news:4186E240.D2811267@aol.com...
: >
: >
: > Frank Pittel wrote:
: >>
: >> In rec.photo.darkroom Tom Phillips <nospam777@aol.com> wrote:
: >>
: >> : Alan Browne wrote:
: >> : >
: >> : > John wrote:
: >> : >
: >> : > > Nope. The human eye is an analog mechanism. Photography is an
: >> : > > effort to capture what the eyes can see in a relatively permanent
: >> : > > medium. Digital is an effort to make money. Digital images are not
: >> : > > analog nor are they permanent. It follows that digital is NOT
: >> : > > photography.
: >> : >
: >> : > One of the stupidest statements lately seen.
: >> : >
: >>
: >> : Actually John is correct. The human eye perceives light
: >> : and objects that reflect light _non-linearly_, the same
: >> : as film and photochemical imaging. These compliment
: >> : each other.
: >>
: >> : Digital is inherently linear.
: >>
: >> You may want to take a look at the response curve of the sensors.
: >
: > The whole point of gamma correction is to get things "linear."
: > OTOH, when an image gets to the typical uncorrected computer
: > monitor it's really screwed up...
: >
: > _FILM_ records light very close to the way the human eye
: > actually sees it. No gamma corection required...

: ...assuming you totally ignore high / low contrast development, lith film...
: etc. etc.etc...

Then there are all the highly saturated, super saturated, ultra saturated, unsaturated
films.



--




Keep working millions on welfare depend on you
-------------------
fwp@deepthought.com
 
Archived from groups: alt.comp.periphs.dcameras,rec.photo.digital,rec.photo.equipment.35mm,rec.photo.film+labs,rec.photo.darkroom (More info?)

"Tom Phillips" <nospam777@aol.com> wrote in message
news:4186E312.CF6CB08C@aol.com...
>
>
> Harvey wrote:
>>
>> "Tom Phillips" <nospam777@aol.com> wrote in message
>> news:4186D29F.1843CDC0@aol.com...
>> >
>> >
>> > Harvey wrote:
>> >>
>> >> [snip]
>> >> > ***FILM*** doesn't produce data, photoelectrons, a
>> >> > voltage, or digital signals. It actually creates a
>> >> > real, tangible, physical photograph. Nothing
>> >> > representational at all.
>> >>
>> >> Last time I checked ***FILM*** actually holds a latent image that
>> >> needs
>> >> to
>> >> be developed chemically to produce **a representation** of the
>> >> original
>> >> image. Or are you suggesting that the silver halides actually hold
>> >> some
>> >> metaphysical part of the image?
>> >
>> > WHY do people say such things without thinking first?
>> >
>> > The image is created upon exposure to light, through
>> > chemical decomposition. The chemical change to silver
>> > is already there. A "latent" image is a chemical image.
>>
>> Last time I took a film out of a camera and looked at it I couldn't see
>> any
>> image......
>
> Not surprising, since you also lack an understanding of
> the physics involved...
>
>> > It's not data representing an image.
>>
>> In the same sense that film contains a chemical change 'representing an
>> image' ?
>
> Photolysis begins before development, upon exposure.
> I.e., image formation....
>

But its not exactly in a useable form is it? It needs to be chemically
enhanced / stabilized to become a 'real, tangible, physical photograph'...
in a similar way to the image stored in a CCD need to be read out [and
processed] to become usable..... spot any similarity here?