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RP and 100-400 EF (not version II) and 2X Canon converter

Started Jan 21, 2021 | Questions thread
Karl_Guttag Senior Member • Posts: 1,883
Re: RP and 100-400 EF (not version II) and 2X Canon converter

jboyer wrote:

I fitted this combination on the RP while questioning the idea of trading this for a RF 800mm.
I believe the 100-400 is a better lens. But for birds, 400 is somewhat short.

Suggestions and opinions?

Thanks.

As others have said, you can get a teleconverter, either Canon or one of the 3rd party ones. I have the 100-400 IS L mk.1 and some old Kenko 2x and 1.4x extenders and the RP will autofocus with one or both of them on via the ef to rf converter as the RF will autofocus above F5.6 (used to be restricted on old DSLRs). It will only "report" the corrected f-number and the focal length if one of the extenders is attached (with both it only reports the correction for one of them depending on the order of the TCs).

My guess is that the new RF800f11 might be a bit sharper but maybe not be much. No idea about the speed of the autofocus.

 Karl_Guttag's gear list:Karl_Guttag's gear list
Canon EOS R5 Canon RF 15-35mm F2.8L IS USM Canon RF 24-70mm F2.8L IS USM Canon RF 70-200mm F2.8L IS USM Canon RF 24-240mm F4-6.3 +14 more
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