Douglas L wrote: CPWarner wrote:
I think this is a great lens as an alternative to the 300 f/2.8 for sports where you could benefit from the zoom range. I don't think it is a lens to supplement a 400-800mm or 600mm for wildlife to carry with one of those lenses. There was a rumored 100-400mm G lens coming. The Sony FE 100-400mm f/4.5-5.6 GM pairs better with the 400-800mm for a two lens setup for wildlife in my opinion, unless you want a much lighter wallet and a much heavier load to carry. The 400-800mm with the 100-400mm f/4.5 and two bodies would fill up my Guragear pack without room for anything else.
I don't shoot sports or wildlife other than birds. I think the new lens may have a lot of appeal to folks who can use this focal range at F4.5. I shoots birds and airplanes. If the 100-400+2XTC is equally sharp as the 400-800, I can see myself getting one, 200-800mm is a lot more versatile than 400-800. I am still waiting for more in depth reviews and comparison.
Not a chance the 100-400 + 2x is as good as the 400-800 in IQ and the AF will be noticeably weaker. There is no free lunch especially with a 2x TC.
Steve Perry's own testing on the Nikon 400 f/4.5 which is very good shows IQ with the 2x is not in the same league as the 800 PF and the 400-800 @ 800 is pretty damn close to the prime. The 600 PF + 1.4 is very close to the 800 PF.
I would never use a 2x on a zoom and I have superb zooms that eats 1.4x TCs for breakfast, but falls short with a 2x. People were saying you could use a 70-200 f/2.8 GM II with 2x and replace the 100-400GMand it's just not true. Hwever as a 98-280 f/4 it's an excellent option so for me replaces a 100-300 f/4 as an option.
May 17, 2026 at 08:50 PM
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