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R5+100-500+1.4x or R7+100-500?

Started 8 months ago | Questions thread
RDM5546
RDM5546 Senior Member • Posts: 3,654
Re: R5+100-500+1.4x or R7+100-500?

TimP111 wrote:

would be surprising if the R7 out resolves the R5.. ofc it doesnt

You are right that with slight cropping and good sharp lens the R5 wins but this issue is about extreme cropping where is not possible possible to get closer to the subject like you experience in skittish wildlife.

At some degree of cropping the higher pixel density on the image circle wins. The APS-C 1.6X crop covers 1/2.56=.391 (39%) of the FF sensor with 72% of the 45MP of the R5.   The APS-C sensor of the R7 has 84% more pixels as the FF camera put on the this part of the center image.  The center image image pixels of the R5 will have less noise resulting from the bigger but fewer pixels.

The use of TC will reduce the aperture size of the R5 images  and that aperture size reduction the R7 does not experience (f7.1 for the R7 and f10 for the R5/1.4X case and f14 for the R5/2X case).   Diffraction effects will pay a bigger role using the 2X extender.

 RDM5546's gear list:RDM5546's gear list
Canon RF 100-500mm F4.5-7.1L IS USM Canon G5 X II Canon EOS 70D Canon EOS 7D Mark II Canon EOS 5D Mark IV +47 more
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