Image quality of 5D4+100-400II+1.4x iii

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an_also
an_also Regular Member • Posts: 155
Image quality of 5D4+100-400II+1.4x iii
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Hi all. I just purchased a 5D4 and I've paired it with my 100-400ii. The results are pretty amazing from my few days of using this combo.

I'm aware that 5d4 has all of the autofocus points at f8 and the i've read that the af is still really really good with the TC.

I'm wondering what the image quality loss will be like if I added the 1.4iii to my setup? (specifically as it relates to the 5d4). And if there is a quality hit, would it still be better than a 80D+100-400ii results?

FYI: I like to mostly shoot mammals (Deer, Moose, Foxes, Coyotes, Goats etc). I do shoot birds but mostly bigger birds. I don't really shoot BIF but sometimes i give it a go.

For my subjects should i even bother investing in a TC?

Any input will be appreciated.

Thanks

 an_also's gear list:an_also's gear list
Canon EOS 5D Mark IV Canon EF 100-400mm F4.5-5.6L IS II Canon EOS M50 Canon EF-M 11-22mm f/4-5.6 IS STM Canon EF-M 15-45mm F3.5-6.3 IS STM
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