Only this hasn’t got a teleconverter on, has it? It’s natively 7.1. Sure, its nice to have the option to slap a TC on an f5.6 lens but when you don’t need it you can take it off. For most subjects and situations f7.1 will be absolutely fine, but there’s a large number of birders, myself included, that really struggle with a max aperture of f5.6.Seriously? Somehow everybody is fine with the 100–400mm with 1.4x at f/8 but the same lens with a "1.25x" builtin extender that you don't even have to toggle on and off is somehow "not L"? Sheesh…
The only reason f/5.6 was the limit for so long was that DSLRs could not focus reliably much beyond that. But DPAF can focus down to f/11, and at the same time sensors and IS systems are better than ever. There's absolutely no reason to artificially limit engineers by imposing an arbitrary f/5.6 max aperture limit.
Given the focal length I would have though f6.3 to be honest.
thats exactly my point regarding the f7.1 max aperture. Even though the high iso IQ of these new cameras is going to be good, freezing action of small animals, usually in forests or in poor light, with my f5.6 lens can require an iso of up to 3200! F7.1 would be asking too much in my opinion.Of course the biggie here, what are those extenders going to go on. Surely something brighter than the 100-500mm. As fun as a 1000mm f14 sounds.
Still hoping for a 200-500 f/5.6 for those that don't use the 100-200mm mark. But this 100-500 is something I can shove in my backpack with a gripped R5 and bring out everywhere. Bit slow for 'sunny' Scotland, but not even f/2.8 has saved me during much of the year. And we have something like 8 stops of IS, it won't freeze action, but should work fine on less timid animals.
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