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Kit Lens Comparison; RF-S 18-45 vs EF-M 15-45, Charts, Imatest, Design

Started 1 month ago | Discussions thread
BobKnDP Senior Member • Posts: 3,140
Re: Kit Lens Comparison; RF-S 18-45 vs EF-M 15-45, Charts, Imatest, Design

koenkooi wrote:

BobKnDP wrote:

What are the units on the horizontal axis of the MTF plots?

10 cycles/mm seems low, so I assume it's something else.

The horizontal axis is distance from the center of the sensor, in mm. So the rightmost section is the corner and the left most section is the center of the sensor.

OK.

In a former life, I was accustomed to seeing MTF plots as a function of spatial frequency.

What is plotted here? Obviously not MTF at a fixed spatial frequency, as that can only have a value of 1 at zero spatial frequency.

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