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800mm f/5.6L vs 200-400mm f/4L 1.4x

Started Jan 10, 2016 | Discussions
tvstaff
tvstaff Veteran Member • Posts: 3,264
800mm f/5.6L vs 200-400mm f/4L 1.4x

Canon EF 800mm f/5.6L IS USM Lens vs. Canon EF IS USM Lens with Internal 1.4x Extender

I shoot a tremendous amount of sports and use the f/2.8 70-200, 300 and 400 all the time.  I'm now in a situation where I feel I need much more lens to get what I need off shore.

I can only have one of these lenses and they will have to mate well with my 1DX's and the new 1DX MKII.

My initial thoughts are the 200-400 at 4/f is the way to go. I've used my 1.4 II TC on all my lenses and I'm worried about degradation.  Perhaps the 200-400 is mated better???

Has anyone here shot sports with both lenses?

I shoot surfers and kitesurfers.

Thank you

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 tvstaff's gear list:tvstaff's gear list
Canon EOS-1D X Canon EOS-1D X Mark II Canon EOS-1D X Mark III Fujifilm GFX 100S Canon EF 35mm F1.4L USM +28 more
Canon EF 200-400mm f/4L IS USM Extender 1.4x Canon EF 800mm f/5.6L IS USM Canon EOS-1D Canon EOS-1D X
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