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Eric wrote:Hiamazing50 wrote:Defraction is caused by two things, a small f stop and sensor or film resolution. Old low resolution film in plate cameras would allow f64 exposures with no defraction and a great depth of field, but improved higher resolution fined grain films moved this back to f22 or f16. Now with higher pixel counts it's pushed back even further to f6.3. Doesn't mean you can't shoot at f16 with a D600, just that the pix won't be as sharp, for pixel peepers, as if you took the same shot at f6.3.
Eric wrote:My main reasons for buying a D600 would be image quality in a lighter body. FX sensors have traditionally meant better IQ than their corresponding DX models. So does the D600 produce better images than the D5200, D7100 or whater its DX equivalent is?
On the D600 this comes into play at f8 and above so a minimum f6.3 should be used.
Don't understand ...did you mean maximum? Either way that sounds a bit restrictive.
I understand the phenomena, just confused that you said the issue 'came into play at f8 and above' ...and then said 'a minimum of f6.3 should be used'. Guess that is a safety margin?
Aside from my interpretation of the wording, I find this issue a tad hard to wrestle with. (grammar!)
Like many, I have for years shot film and digital being aware that lens optimum performance, though varying, invariably peaked around f8 - f11.
But the subject dictated the aperture choice, not the ability of the lens or (now) the digital sensor to deliver optimum 'results' (however that is defined).
If I am shooting close to a 'deep' subject, I may have to use f16 to get the desired dof. I dont say "oh hang on... the lens won't be at its best, so I better change my shooting position" or accept a dof that I didnt want.
I suppose there are people out there, the pixel peepers you mention, who feel this sort of analysis is of merit. Analogous to hifi people telling me my speakers hiss when I just listen to the music.
Personally, the day someone rejects my images due to small aperture artefacts, has yet to come along. It will be an interesting day if it does. LOL
Last edited on Thu Aug 22nd, 2013 04:56 by Eric
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Eric