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greenwing

Yorkshire, UK
1304 posts

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"RE: Help me out please"

greenwing Registered since 18th May 2006
Mon 29-Oct-12 02:01 PM | edited Mon 29-Oct-12 04:09 PM by greenwing

>
>>What am I missing? Where do you get the information to
>make
>>the EV11 call, Brian ?
>
>I'm wondering as well, as about when he was posting that I was
>about to post that it was +14, which was three stops
>different. I just dug up (thanks to Google) a calculator
>here:
>
>http://www.giangrandi.ch/optics/lenses/expcalc.html
>
>And it gives 13.9. Now the lens focuses wide open and the
>comment was in the AF usage sense, so at F5.6 you get about
>EV+.3 more for focus.
>
>

That calculator doesn't seem to movethe EV when you change ISO. The Luminance changes, but not the EV.

Chris

This is a hot, active topic! Help me out please [View all] , Escaladieu Silver Member , Tue 23-Oct-12 12:27 PM
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