cpe1991 wrote:
I had, until yesterday, a great copy of the 150-600mm C, very sharp but a bit slow AF on my 5DIV, 5DSR etc, and was really pleased with it. On the R5, it leisurely focussed, and with the Sigma 1.4xTC, very, very slow. Conversely, the 100-400mm II is blazingly fast, and still very fast with a 2xTC. So, yesterday, it was reluctantly packed up and sent for sale. Maybe a new firmware upgrade from Sigma would fix it (it was on the latest firmware). Perhaps others have had different experiences.
Agree with your thoughts regarding the C 150-600 on the 5DIV . In my case, I use canon 1.4 not the sig 1.4
Sounds like it did not perform as well on the R5. Luckily I also have a 100-400II so your report of it working much better than the C 150-600 is good to hear.
Ironically I can't get the C 150 -600 + 1.4 to AF on the Sony A7rIII. Maybe the TC or MC11 is the issue.
Oct 21, 2020 at 12:20 PM
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