That's a variable aperture lens, I have a couple of Varifocus lenses and
they don't change the exposure at all.
Doug Brewer wrote:
On a lens that changes from 4.5 on the short end to 5.6 on the long
end, it's difficult to ascertain exactly where it changes, so you
don't know which value is being used, thus making it harder to
determine the exact exposure.
At least, this =seems= to be what Shel means.
frank theriault wrote:
On 5/18/05, Shel Belinkoff <[EMAIL PROTECTED]> wrote:
<snip>Do not use a
variable focus zoom lens when learning exposure. <snip>
Why would you give that advice, Shel, when talking about exposure?
I would think that when learning composition, eliminating as many
variables as possible means that one can concentrate on the task at
hand, rather than fiddling with focal length.
But what does it have to do with exposure?
I'm not taking you to task WRT your statement, or or questioning the
validity of it, I just don't understand it.
thanks,
frank
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