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flyer · 10-21-2009, 02:00 AM

Originally posted by mysticcowboy

There's a trade off in using f22. Yes, you get a wider depth of field but most lenses start losing sharpness through diffraction after f11.

The difference is negligible with normal sized prints. You will see a difference only in very LARGE prints. You won't even see the difference on the computer screen.

ully · 10-26-2009, 06:43 PM

Just set the infinity symbol to the aperture you are using.

jgredline · 10-26-2009, 07:45 PM

Originally posted by ully

Just set the infinity symbol to the aperture you are using.

No, not really. You need to factor in the crop factor of 1.5 for DSLRs'

flyer · 10-27-2009, 01:58 AM

Originally posted by jgredline

No, not really. You need to factor in the crop factor of 1.5 for DSLRs'

I wouldn't worry about that, since DOF is larger (deeper?) with an APS-C sensor than FF sensor.

Andreas · 10-27-2009, 04:39 AM

Originally posted by ChrisJ

Most lenses have 1/3rd of the available DOF in front of the focus point and 2/3rds behind, so in 5. above try moving the focus scale just 1/3rd of the difference rather than halfway.

ChrisJ

"Most lenses have 1/3rd of the available DOF in front of the focus point" -no! Check a DOF calculator and you will see. It has nothing to do with "most lenses". And "try moving the focus scale just 1/3rd rather than halfway" -no, halfway it is.

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10-21-2009, 02:00 AM	#16
flyer Veteran Member Join Date: Jan 2008 Location: Ste-Anne des Plaines, Qc., Canada Posts: 2,013	Originally posted by mysticcowboy There's a trade off in using f22. Yes, you get a wider depth of field but most lenses start losing sharpness through diffraction after f11. The difference is negligible with normal sized prints. You will see a difference only in very LARGE prints. You won't even see the difference on the computer screen.

10-26-2009, 06:43 PM	#17
ully Forum Member Join Date: Sep 2006 Location: Seattle, Wash. USA Photos: Gallery Posts: 63	Just set the infinity symbol to the aperture you are using.

10-26-2009, 07:45 PM	#18
jgredline Veteran Member Join Date: Oct 2007 Location: LosAngeles, Ca. Photos: Albums Posts: 10,628	Originally posted by ully Just set the infinity symbol to the aperture you are using. No, not really. You need to factor in the crop factor of 1.5 for DSLRs'

10-27-2009, 01:58 AM	#19
flyer Veteran Member Join Date: Jan 2008 Location: Ste-Anne des Plaines, Qc., Canada Posts: 2,013	Originally posted by jgredline No, not really. You need to factor in the crop factor of 1.5 for DSLRs' I wouldn't worry about that, since DOF is larger (deeper?) with an APS-C sensor than FF sensor.

10-27-2009, 04:39 AM	#20
Andreas Inactive Account Join Date: Jun 2007 Posts: 75	Originally posted by ChrisJ Most lenses have 1/3rd of the available DOF in front of the focus point and 2/3rds behind, so in 5. above try moving the focus scale just 1/3rd of the difference rather than halfway. ChrisJ "Most lenses have 1/3rd of the available DOF in front of the focus point" -no! Check a DOF calculator and you will see. It has nothing to do with "most lenses". And "try moving the focus scale just 1/3rd rather than halfway" -no, halfway it is.

Simple Hyperfocal DOF

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