Is a FF camera worth it for these reasons? Locked

Started May 21, 2014 | Discussions thread
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Great Bustard Forum Pro • Posts: 42,819
FF vs crop

qianp2k wrote:

Absolutely difference between crop and FF. FF system (lens + sensor) is much better than APS-C or smaller crop system in IQ.

My point is that,

if APS-C lens is equally well designed and optimized on APS-C, then it will perform better than a FF lens designed and optimized on an APS-C camera with the same or similar FL on the same FF eq spec such as a F1.8 lens on APS-C vs a F2.8 lens on FF;

However the same APS-C lens on APS-C camera is still not as good as the FF lens on a FF camera.

Sigma 18-35/1.8 is such a good sample.

FF most certainly comes out on top over crop (Canon vs Canon -- other APS-C, or mFT, has various advantages over Canon FF due to the superior Sony sensors).

However, there are three situations where the IQ advantages of FF are severely limited:

  • Equivalent Photos (same DOF and shutter speed)
  • Deep DOF Photos (due to diffraction)
  • Small Display Size (display on a computer monitor and/or prints at, say, 8x12 inches or smaller)

In these situations, the IQ advantage of FF over crop are greatly diminished, and one might well find the operational advantages of crop, not to mention the lower cost, to make crop the better system.  In my opinion, more, by far, are better served with crop than with FF.

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