Understanding exposure question

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Jason B.
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p.1 #1 · Understanding exposure question

Hello eveyone, I am about halfway thru this book and byran
keeps mentioning that in order to achieve full frame sharpness
in the f/22 range I need to use " distance focus". Now before
I read any further what exactley does this mean? He mentions
a distance ring on fixed lenses but my 50 1.8 doesnt have it
or I am missing it. So my question is when you guys take a
photo that you want the whole frame in focus as sharp as you can
get what do you focus on and how far into the frame? I think he said
something about 1/3 up but want to ask anyway. Thanks for the help!

Apr 05, 2008 at 05:51 PM

floris
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p.1 #2 · Understanding exposure question

Google "hyperfocal distance".. essentially it's a way to make sure you get the most of your scene in focus.

The 50/1.8 mkII does not have a distance ring, nearly every other lens does.

Apr 05, 2008 at 05:55 PM

Jason B.
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p.1 #3 · Understanding exposure question

I will do that many thanks....

Apr 05, 2008 at 06:02 PM

ShaneEngelking
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p.1 #4 · Understanding exposure question

http://www.dofmaster.com/dofjs.html is a great link for finding precisely what your DOF is. For instance, with a 5D focused 15 feet away at 31mm and f/7.1, everything from 7.5 feet away until infinity will be in focus, so if you keep anything within 7.5 feet out of frame, EVERYTHING will be in focus.

Edited on Apr 05, 2008 at 06:19 PM

Apr 05, 2008 at 06:17 PM


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