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

Started Jan 21, 2021 | Questions thread
davev8
davev8 Veteran Member • Posts: 4,833
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.

i had a friend with the 100-400mki and i have researched and looked at a lot of photos from that lens and came conclusion that evan without a converter and with no cropping the IQ from that lens is border line for ..the RF 800 is MUCH sharper than the 100-400 + X2 but the 800 is a one trick pony

here you can see the tamron 150-600 G2 is  better than the 100-400 + 1.4X mkiii and faster at F6.3 VS F9

the tamron 150-600 + 1.4x vs RF 800mm the 800 has the edge but the tamron is faster evan with the X1.4 at F9 vs F11

i would not entertain the 100-400 mki...the 800 has the best IQ but i think the versatility of the 150-600 makes it a much more usable lens unless you are only ever need 800mm

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