APS-C IMAGE QUALITY VS fULL fRAME AT TESTING

Started Feb 24, 2013 | Discussions thread
Great Bustard Forum Pro • Posts: 41,916
I can help.
1

qianp2k wrote:



So let's understand what "resolution" really mean to us? If is there crop factor and penalty from crop magnficaiton (enlargement)?

http://www.josephjamesphotography.com/equivalence/index.htm#lensvssensor

In short, the resolution as a function of sensor size and pixel count can be summed up as follows:

  • For a given lens sharpness, the difference in resolution (lw/ph) between two systems will be between the ratio of the sensor heights (enlargement ratio) and the ratio of picture height in pixels (linear pixel density).  The sharper the lens, the closer the balance will be to the ratio of linear pixel density, the less sharp the lens, the closer the balance will be to the enlargement ratio.

However, the lenses specifically designed for smaller formats are often sharper than the lenses designed for larger formats.  Whether or not this is enough to overcome the difference in sensor size depends on the specific lens-sensor combination, and, of course, whether or not we are comparing at the same AOV and DOF.

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