![]() ![]() Then the question is can their lenses resolve the full 16MP, and if DxOmark ratings are anything to go by (which generally gives their lenses resolving power in the 8-11MP range), is it correct to say because effective resolution is slightly less than sensor resolution, that in fact they only see diffraction limits on their lenses somewhere quite a bit higher than where the theoretical limit kicks in? I mean let's say on the Olympus 75-300/4.8-6.7 - is it already diffraction limited at the long end wide open? You couldn't stop it down for better sharpness in any way? M4/3 can go somewhere just above f5.6 but not much more. Thanks, that solves it nicely! So taking realistic camera options: larger sensor means more MP with same aperture. f/8 on the A7r vs f/6.3 on NEX 7).Īll this means is if you had an A7 and A7r and shot at f/11, you would lose most (probably not quite all) of the A7r resolution advantage.ĭiffraction is completely limited by aperture, but sensor size determines what MP you can get (i.e. ![]() Full frame cameras tend to perform better than smaller sensor cameras since they are well stopped down by the time you reach the diffraction limit for the sensor (i.e. You have aberration limited at large apertures and diffraction limited at small apertures. Not many (any) full frame lenses could resolve 1500 MP at f/1.2. I think you can do better or worse than those figures depending on how you calculate it, there is a bit of a fuzzy area.īut as you can see, with A7, I like to keep at f/11 or less, A7r at f/8 or less, but remember, you need better and better lenses to shoot at large apertures. I think there are more ways then one to calculate it, I just use tawbaware page:Īt the same depth of field they are the same (note 4/3 at f/11 = FF at f/22). all involved in the calculation.ĭiffraction is completely limited by aperture, but sensor size determines what MP you can get (i.e. Ok I'm trying to understand this since there's a combination of megapixels, aperture, sensor size, etc. ![]()
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