EF-S/EF-M vs EF Lenses & Perceptual Megapixels

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jonbennell New Member • Posts: 15
EF-S/EF-M vs EF Lenses & Perceptual Megapixels


As we all strive to improve image quality, this topic caught my interest:

DxOMark introduces 'Perceptual MPix' score for lens sharpness

Should you use Full Frame Lenses on Crop Bodies? Yes and No...

I came from a 400D , then 40D and now a M6. Over the course of time I have a handful of lenses, including:

EF 100mm f/2.8L IS
EF 70-300mm f/4-5.6L IS

If I've understood the above properly, using a APC-S sensor with these lenses is actually worse (lower sharpness and effective use of the camera sensors entire resolution) than using either native EF-M/EF-S lenses at the same focal lengths.

Is this just all therotical or is there really substance to this?

 jonbennell's gear list:jonbennell's gear list
Canon EOS M6 Canon EF-S 17-55mm f/2.8 IS USM Canon EF 100mm F2.8L Macro IS USM Canon EF 70-300mm f/4-5.6L IS USM Canon EF-M 22mm f/2 STM +2 more
Canon EOS 400D (EOS Digital Rebel XTi / EOS Kiss Digital X) Canon EOS 40D Canon EOS M6
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