Comments on: Lesson 3: aperture http://christinegacharna.com/blog/2009/07/03/lesson-3-aperture/ maternity, newborn, baby, children + family Fri, 30 Jul 2010 01:31:49 +0000 hourly 1 http://wordpress.org/?v=3.0.1 By: christine http://christinegacharna.com/blog/2009/07/03/lesson-3-aperture/comment-page-1/#comment-1382 christine Sun, 12 Jul 2009 14:33:06 +0000 http://christinegacharna.com/blog/?p=2610#comment-1382 thank you, Greg! very well done. except that you forgot to link your portfolio to collect on your extra credit! :) thank you, Greg! very well done. except that you forgot to link your portfolio to collect on your extra credit! :)

]]> By: Greg http://christinegacharna.com/blog/2009/07/03/lesson-3-aperture/comment-page-1/#comment-1381 Greg Sat, 11 Jul 2009 19:33:03 +0000 http://christinegacharna.com/blog/?p=2610#comment-1381 Just out of curiosity.. in the "critical aperture" section you said that the best performance can be excepted from the lens which has max aperture say 1.2, about two stops up (from this aperture) Then you said that: we should expect the best performance at f4.0 which isn't two stops. Each stop is about a previous number times 1.414. F1.2 is half stop from 1.0. So let's imagine we talking about lens that has max aperture 1.4 instead of 1.2 1.4 * 1.414 = 2.0 (it's actually 1.9796) but 2.0 is close enough. This is first stop. Then: 2.0 * 1.414 = 2.8 second stop. So the best performance for this lens is about 2.8 not 4.0. For the lens with 1.2 max aperture the "critical aperture" should be a half stop less. (which is about f/2.4) Love your tutorial :grin: Just out of curiosity.. in the “critical aperture” section you said that the best
performance can be excepted from the lens which has max aperture say 1.2, about two stops up (from this aperture)
Then you said that: we should expect the best performance at f4.0 which isn’t two stops. Each stop is about a previous number times 1.414.
F1.2 is half stop from 1.0.
So let’s imagine we talking about lens that has max aperture 1.4 instead of 1.2
1.4 * 1.414 = 2.0 (it’s actually 1.9796) but 2.0 is close enough. This is first stop.
Then: 2.0 * 1.414 = 2.8 second stop.
So the best performance for this lens is about 2.8 not 4.0.
For the lens with 1.2 max aperture the “critical aperture” should be a half stop less.
(which is about f/2.4)
Love your tutorial :grin:

]]> By: christine http://christinegacharna.com/blog/2009/07/03/lesson-3-aperture/comment-page-1/#comment-1367 christine Sun, 05 Jul 2009 22:07:08 +0000 http://christinegacharna.com/blog/?p=2610#comment-1367 Ray, a writer couldn't ask for a nicer compliment coming from you. Please don't apologize for recusing yourself; I definitely don't aim to teach you EVERYTHING I know, as I hope to land the job shooting you author photo when you publish your next book. :) Ray, a writer couldn’t ask for a nicer compliment coming from you. Please don’t apologize for recusing yourself; I definitely don’t aim to teach you EVERYTHING I know, as I hope to land the job shooting you author photo when you publish your next book. :)

]]> By: Flash http://christinegacharna.com/blog/2009/07/03/lesson-3-aperture/comment-page-1/#comment-1365 Flash Sun, 05 Jul 2009 14:20:56 +0000 http://christinegacharna.com/blog/?p=2610#comment-1365 Nice! Nice!

]]> By: Ray http://christinegacharna.com/blog/2009/07/03/lesson-3-aperture/comment-page-1/#comment-1360 Ray Sat, 04 Jul 2009 05:41:07 +0000 http://christinegacharna.com/blog/?p=2610#comment-1360 Sorry. I must recuse myself. But I thought your post was extraordinarily well written. Happy Independence Day. Sorry. I must recuse myself. But I thought your post was extraordinarily well written.

Happy Independence Day.

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