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R5 with 100-500 + 1.4tc vs R7 with Canon 100-500

Started 7 months ago | Discussions thread
drsnoopy Senior Member • Posts: 1,216
Re: Re shoot (more precise focusing)
1

Interesting comparison.  On your second test, I still see a slight advantage to the R5. 
However I have a question - what did you do to get the image scale identical?  The R7 image should be 14% larger (800mm EFL vs 700mm FL).  Did you zoom back to 437mm on the R7 to get 700mm EFL?  In which case the different position of the zoom lens elements could affect the results.  Or did you match the sizes by using different magnification on-screen in Lightroom?  In which case apparent resolution is affected by interpolation (fractional magnifications show best screen resolution at 16.7, 25, 33.3,50, 66.7 and 75%, scales in between appear less sharp) - you would need about 87% on the R7 vs 100% on the R5.

Just interested to know what you did - not intended as a criticism, but to point out that there are confounding factors in such a test.

 drsnoopy's gear list:drsnoopy's gear list
Canon EOS RP Canon EOS R5 Canon EOS R10 Canon EF 100mm F2.8L Macro IS USM Canon RF 35mm F1.8 IS STM Macro +10 more
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