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Pontus
Joined: 18 Dec 2011 Posts: 1471 Location: Jakobstad, Finland
Expire: 2016-08-25
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Posted: Mon Apr 09, 2012 4:56 am Post subject: Diffraction limited aperture in real life |
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Pontus wrote:
I would imagine that the diffraction limits are not so much limits but more the point where you reach optimum performance (sharpness wise). If I want to get the maximum depth of field (a macro shot for example) I still need to use a small aperture. The diffraction limit might mean that the picture is less sharp but at least more of the picture is sharp. More depth of field can give a crisper image because we perceive it as sharper since more is in focus. Just some thoughts over my morning coffee. Is the diffraction thing a bit of a hype? _________________ Follow this link for my FOR SALE list (partially updated 19.11.2015) |
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poilu
Joined: 26 Aug 2007 Posts: 10472 Location: Greece
Expire: 2019-08-29
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Posted: Mon Apr 09, 2012 6:47 am Post subject: |
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poilu wrote:
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I would imagine that the diffraction limits are not so much limits but more the point where you reach optimum performance (sharpness wise) |
exactly, optimum performance (sharpness wise)
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If I want to get the maximum depth of field (a macro shot for example) |
best macros are at f5.6 with focus stacking to get dof
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More depth of field can give a crisper image because we perceive it as sharper since more is in focus |
less depth of field give a crisper image because the subject in focus pop
if everything is sharp, image is flat (usually called p&s or phone pic)
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Is the diffraction thing a bit of a hype? |
for those viewing their pics at 800x600 , yes it is a hype
even an out of focus pic can be made crisp at 800x600 with little sharpening _________________ T* |
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ilguercio
Joined: 08 Mar 2012 Posts: 414 Location: Southern Italy-Calabria!
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Posted: Thu Apr 12, 2012 5:07 pm Post subject: |
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ilguercio wrote:
The trouble really comes early with overcrowded sensors. My 50D is rated to reach diffraction at f/7.1 which is a bit worrying since f/8 and f/11 are still widely useful with wide lenses.
I have yet to do a test between my 50D and my 20D but i'm expecting more detail out of the former since has more megapixels until f/8, then the results should change according to the maths.
I guess one should do some tests with his gear to better understand what are the real limits of the things he's using. Anyway, i never use apertures narrower than f/11 so i'm still within the acceptable. |
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Himself
Joined: 01 Mar 2007 Posts: 3240 Location: Montreal
Expire: 2013-05-30
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Posted: Wed May 30, 2012 3:38 am Post subject: Re: Diffraction limited aperture in real life |
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Himself wrote:
Pontus wrote: |
Is the diffraction thing a bit of a hype? |
It's not a hype at all.
Without this phenomenon photography wouldn't existed. _________________ Moderator Himself |
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visualopsins
Joined: 05 Mar 2009 Posts: 10957 Location: California
Expire: 2025-04-11
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Posted: Wed May 30, 2012 3:48 pm Post subject: |
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visualopsins wrote:
poilu wrote: |
[...]
Quote: |
If I want to get the maximum depth of field (a macro shot for example) |
best macros are at f5.6 with focus stacking to get dof
[...] |
Depends on sensor, right? f/5.6 for APS-C, f/8 for FF & 35mm film... |
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fuzzywuzzy
Joined: 18 Dec 2010 Posts: 1258 Location: Down East, Canada, eh?
Expire: 2013-11-30
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Posted: Thu May 31, 2012 11:06 pm Post subject: |
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fuzzywuzzy wrote:
visualopsins wrote: |
poilu wrote: |
[...]
Quote: |
If I want to get the maximum depth of field (a macro shot for example) |
best macros are at f5.6 with focus stacking to get dof
[...] |
Depends on sensor, right? f/5.6 for APS-C, f/8 for FF & 35mm film... |
Dpends on pixel density.
Calculator here: http://www.cambridgeincolour.com/tutorials/diffraction-photography.htm _________________ I welcome C&C, editing my pics and reposting them on the forum is fine.
NEX-F3
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CZJ Sonnar 135/4, Biotar 58/2, Pancolar 50/2, Tessar 50/2.8, Flek 35/2.8, Flek 25/4
Super Takumar 135/2.5, 135/3.5, 100/4 bellows, 50/1.4, 28/3.5
Helios 58/2, 3M-5A 500/8, Mir 20M
Vivitar Series 1 70-210 - - - - - - - - Nikkor 200/4
Rikenon 28/2.8 - - - - - - - - Zeiss 50/1.7 Planar
PB 50/2.4, 135/2.8
Yashica 50/1.9, 28/2.8, 135/2.8
Hexanon 28/3.5, 50/1.4 |
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Pontus
Joined: 18 Dec 2011 Posts: 1471 Location: Jakobstad, Finland
Expire: 2016-08-25
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Posted: Thu May 31, 2012 11:32 pm Post subject: Re: Diffraction limited aperture in real life |
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Pontus wrote:
Himself wrote: |
Pontus wrote: |
Is the diffraction thing a bit of a hype? |
It's not a hype at all.
Without this phenomenon photography wouldn't existed. |
I guess I expressed myself poorly. Of course diffraction exists as a physical phenomenon. What I meant was that diffraction limited does not mean that a nice (or even nicer) picture cannot be taken at a smaller aperture than the diffraction limit. I'm trying to say that yes, the optimum sharpness is at the diffraction limit but maybe the picture will look sharper at a smaller aperture because the depth of field is greater. As in architecture or landscape. _________________ Follow this link for my FOR SALE list (partially updated 19.11.2015) |
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erkie
Joined: 08 Oct 2011 Posts: 308 Location: Missouri
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Posted: Fri Jun 01, 2012 12:32 pm Post subject: |
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erkie wrote:
We have stopped down to whatever aperture is necessary for the shot for a very long time . I don't plan on changing that any time soon _________________
I shoot film and meter with digital
Asahi H3v, Praktica FX3, Retina IIa, Spotmatic sp1000, Fujica V2, Yashica lynx5000, Pentax Sf1, Minolta SRT102, Minolta7000i, Pentax MX, Pentax ME, Pentax Kx
lensesM42- Isco Gottingen Westanar 50/2.8, Isco Gottingen Westron 35/2.8, Rikenon 35/2.8, Spiratone Tc 105/2.5, Spiratone Tc 200/4.5, Sankyo Kohki Komura 300/5, Sankyo Kohki Komura 135/3.5, Auto Tak 35/3.5, Super Tak 150/4, S-M-C Tak 50/1.4, S-M-C Tak 28/3.5, SMC Tak 55/2, Mamya Sekor 55/1.8
K- mount- Helios 44-K-4, Jc penny 28/2.8, Da 18-55, Da 55-300, Pentax F 35-70, SMCP M 50/1.4, SMCP M 50/1.7
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sichko
Joined: 20 Jun 2008 Posts: 2475 Location: South West UK
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Posted: Fri Jun 01, 2012 12:36 pm Post subject: |
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sichko wrote:
erkie wrote: |
We have stopped down to whatever aperture is necessary for the shot for a very long time . I don't plan on changing that any time soon |
Nicely put. _________________ John |
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