Not excited about my D800

Started Jun 4, 2012 | Discussions thread
Antony John Senior Member • Posts: 1,252
Re: Grow into it

Thanks Luke,

I was thinking more of the downsampling procedure and not considering the effects of the sensor MFTs.
Now it makes sense.

Luke Kaven wrote:

1) The difference in AA filters. The AA filter gives you the effect of rolling off the high spatial frequencies before the nyquist limit.

2) Bayer demosaicking artifacts. A bayer matrix in a 12MP sample space does not give you all spatial frequencies up to the nyquist limit. Again, there is a roll-off on the higher frequencies.

3) The increased information content of the 36MP sensor over the 12MP sensor (includes augmented spatial information).

The key thing you would be observing is MTF -- the MTF of a native 12MP capture compared to the MTF of a native 36MP capture downsampled to 12MP. The native 36MP capture will show slightly more in the high frequenceis carried through to the 12MP sample space.

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