Yes, of course you are right. But when you are loosing one stop a decade
to failing clarity of the lens in your eye (as we are all doing, so I've
read) anything that can slow down the process is appreciated. Either that
or go to auto focus. Can't believe I said that!
Gregg
Winsor wrote:
What fools a lot of people, Mark, is that the view
through the camera does not "look" twice as bright
when we open up one stop. I,ve had a difficult time
explaining this to people who insist the screen only
looks twice as bright when you open up two stops. They
believe their eyes before they accept the math. John
--- "Mark A. Thalman" <mthalman@xxxxxxxxxxxxx> wrote:
I think this is sort of what I was driving at when I have pooh-poohed
upgrading to the series 2 screens in the past. John Hermanson said, I
believe, that you get a measurable increase in screen brightness of .6 of
an F stop. Thank goodness for John's objectivity. An easy way then to
check whether those of you who have been thinking about it really need a
series 2 screen would be to take your fastest lens on your OM, stop it
down 1/2 F stop from wide open and look through the viewfinder while
pressing in the preview button on the lens. While looking through the lens
let up on the preview button so that the aperture opens to its widest and
note the difference with 1/2 stop more light. It ain't dramatic. At least
not to me.
If brightness is very important then the clear screens with microprism
centers such as 1-5, 1-6, or 1-7 are very bright subjectively. You just
don't get as flexible a viewfinder tool for most shooting as the 1-13.
Winsor
--
Winsor Crosby
Long Beach, California, USA
mailto:wincros@xxxxxxxxxxx
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