[davidmanze]

[quote pid='51211' dateline='1591795920']

"And at 150mm? Are you just writing nonsense?" 

I know you don't do birding or you wouldn't ask that question ...

..... any one who does will understand what I was saying because they have done it themselves it's called versatility ......  zooming out when a bird gets close ... in this case to 150mm if necessary!!

   "It appears that these 600mm and 800mm f11 lenses will bring something others do not yet offer, small and compact tele prime. If that will be attractive for certain uses/users depends especially on price, weight and size"

  Yeah, an additional lens to carry over and above your standard tele, zoom or otherwise, that could be replaced by a tele-converter or cropping  with shallower DOF, letting in way more light.

 I generally like Canon glass but they've gone from one extreme to another here , the 24-70mm F2 at one end of the spectrum ........ to 800mm F11 at the other ......

 I repeat, this is my sphere, the 800mm F11 is too dark! 

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