Does anyone have experience whether the lens works on the Canon 90D? I would be particularly interested in the autofocus in viewfinder mode (precision and speed).
Does it make sense to replace my 100-400 + 1.4 converter with the 15-600? Thank you for your feedback.

Question

Does anyone have experience whether the lens works on the Canon 90D? I would be particularly interested in the autofocus in viewfinder mode (precision and speed). 
Does it make sense to replace my 100-400 + 1.4 converter with the 15-600? Thank you for your feedback.

Answer

I used the Sigma 150-600 Sports on an EOS 80D a few years ago. The autofocus wasn't that great. I then sold the 3kg block and bought the Canon EF 100-400 L IS II. I also used it with the 1.4x Tk. The AF of the 100-400 is worlds faster. I.e. the answer to the question: No, in my opinion it makes no sense at all.

Your data. Your choice.

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Question about Sigma 150-600mm f/5-6.3 DG OS HSM (C)

Does anyone have experience whether the lens works on the Canon 90D? I would be particularly interested in the autofocus in viewfinder mode (precision and speed). Does it make sense to replace my 100-400 + 1.4 converter with the 15-600? Thank you for your feedback.