NOISE

[Stacey]

Archived from groups: rec.photo.digital (More info?)

paul wrote:

> Stacey wrote:

>>
>> You should be able to do this with a slow lens as well unless it is a
>> poor quality one. F8 is F8 no matter if the lens is a F5.6 max lens or a
>> f2.8 max lens.
>
>
> Am I understanding this wrong?

Yes you are!

> A fast lens should shoot at a faster
> speed at the same f-stop

Nope, same f stop need the same shutter speed no matter what lens is being
used.. Doesn't matter what lens or format. F8 at 1/60 is the same on a tiny
sensor digicam or an 8X10 film camera.

> as a slow lens as I understand. It's not just
> that it's capable of going to a lower f-stop number.

That's ALL the difference, to get the faster shutter speed, you have to use
the larger lens opening.

--

Stacey

 

[Paul]

Archived from groups: rec.photo.digital (More info?)

Confused wrote:
> On Thu, 17 Feb 2005 08:23:23 -0800
> In message <WuSdnd379KJhWYnfRVn-ow@speakeasy.net>
> paul <paul@not.net> wrote:
>
>>>>><snip>
>>>>
>>>>I do have patience to sort through a billion pics
>>>>later though.
>>>
>>>That sounds awful!
>
>
> Indeed.


I'm usually doing documentation, not strictly looking for art photos so
yes I want a lot of pictures. Obviously I don't want to sort a lot of
rejects.


>
>>Well, we all have our personalities. For me spending time in the field
>>fiddling with a tripod would drive me nuts, once I settle down on the
>>computer in the evening, I have no problem with patience.
>
>
> Try a compromise, and don't settle for a cheaper smaller head, or a
> non-rotating lock monopod. Find and try a Gitzo mono pod with a
> NOVOFLEX CLASSICBALL 5 BallHead.


Wow, that alone is $500. I'd rather pay for an Image Stabilized lens.


> It will serve as an "almost" tripod,
> won't slow you down, can be used without touching the ground (it acts
> like a stabilizer)


Hmm, that makes sense, just the weight & bulk would stabilize things
considerably hand held.


> and will actually save you time composing shots.
> If you find a better, smoother, easier to use and more functional ball
> head let me know... and do NOT settle for a small jerky light weight
> head.
>
> (there are a couple other heads in this class, but it's the only one I
> could get my hands on. gonna get one for my gitzo explorer tripod,
> too, so I can keep them tightly and permanently mounted. don't forget
> quality quick releases and spare camera/lens side adaptors. ;^)
>
> Jeff

 

[Paul]

Archived from groups: rec.photo.digital (More info?)

Stacey wrote:

> paul wrote:
>
>
>>Stacey wrote:
>
>
>>>You should be able to do this with a slow lens as well unless it is a
>>>poor quality one. F8 is F8 no matter if the lens is a F5.6 max lens or a
>>>f2.8 max lens.
>>
>>
>>Am I understanding this wrong?
>
>
> Yes you are!


Better late than never. I had photography 101 in college 20 years ago
<grin>.


>
>
>>A fast lens should shoot at a faster
>>speed at the same f-stop
>
>
> Nope, same f stop need the same shutter speed no matter what lens is being
> used.. Doesn't matter what lens or format. F8 at 1/60 is the same on a tiny
> sensor digicam or an 8X10 film camera.
>
>
>>as a slow lens as I understand. It's not just
>>that it's capable of going to a lower f-stop number.
>
>
> That's ALL the difference, to get the faster shutter speed, you have to use
> the larger lens opening.


Hmm, so any lens at f/8 will need the same shutter speed under the same
lighting conditions. A 'Fast' would necessarily have to be wider, larger
I guess, and probably longer?

http://www.armguard.com/security%20terms%20glossary.htm
" A term used to describe the speed of a lens, or its ability to pass
light through its lensing and onto the imager. It is determined by
dividing the focal length of the lens by the diameter."