Opticallimits

The MTF at 600 are rather impressive for such a mega zoom!

Yeah, if there's real-world truth to these MTFs, it's basically as good as the 150-600mm DN.

Is it the same optical formula of the DSLR version ??

The DN version has better MTFs than the DSLR version at least.

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So here it is ... the new BIGMA

https://www.sigma-global.com/en/lenses/s...600_45_63/

Interesting ... 7 f-stop OS2

Looks very good ..... we're up to 27 elements now ...... so 2.4  Kgs !....

An insane number of elements seem to be the trend. I don't like it really. Less so because of the weight but because of the required centering accuracy.

So much for the "same design..."
Well anyway, I loved this comment from DPReview:

"This is basically for wedding photographers that are not allowed to attend to the wedding".
:-)

Christopher Frost has already tested the lens see here:

https://www.youtube.com/watch?v=5uFOfvQs46I

Christopher seems to have an "in" to obtain almost any lenses from manufactures ...... it must be devine intervention .....

................ he is a vicar after all

great lens ....... personally I prefer the brighter F6.3 @ 600mm even in spite of the weight rather than the current trend towards F7.1 lenses at the long end.