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APS-C + Extender = ???
APS-C + Extender = ??? How does that math work? So I have an R7, which has a crop factor of 1.6x. I typically use either the Tamron 100-400 or the Sigma 150-600. At their max focal length, with Canon(?) extenders (1.4/2x) is it: 400/600 x 1.6 = 640/960 then x 1.4/2 = 896/1280 and 1344/1920 Or..? Am I missing anything? Also, bonus points if anyone can give me any insig...
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