Is DXO Right - D800 only 2-3 mp more than D600

Started Mar 17, 2013 | Discussions thread
Tony Beach
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Re: Is DXO Right - D800 only 2-3 mp more than D600
In reply to A Owens, Mar 20, 2013

Tony Beach wrote:

A Owens wrote:

If we take the Nikons best lens (85/F1.4),

Does this lens resolve more than the D800 is capable of revealing?

So your theory is lens constraint. Basically that resolution diminishes sharply after about 20mp (at least on the lens). Makes sense but a bit disconcerting given that the 85/1.4 is the highest resolving Nikon lens tested by DXO.

Just to be clear, resolution does not diminish, the increases in resolution diminish. There was an increase in resolution going from 24 MP to 36 MP, and there will an increase in resolution going from 36 MP to 54 MP; it's just that as we get closer and closer to what any lens is theoretically capable of achieving, it will require exponentially more sensor resolution to get there.

The truth is that for most of us resolution stopped being an issue around 24 MP with FX/135 format. Realizing greater resolution requires longer lenses, wider apertures, more and more support, etcetera. In the real world -- even one where the photographer is using a solid tripod, a great lens, mirror lock-up with a remote trigger, and shooting subjects at low ISOs -- you just aren't going to squeeze much more resolution out of a 36 MP FX/135 format sensor than out of a 24 MP FX/135 format sensor. To get more we are back to stitching, and the dirty little secret about stitching is that when you do that you are no longer working in FX/135 format (you are in fact working in a larger format, the one that equates to the total sensor area from your combined frames).

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