Another day of attempting to test the Sigma 150-600 + 1.4X III combo with the R6. Hoped to find eagles trying a different location, but skunked again with the only subjects available being much smaller. Was hoping to also find a rarity here of a white throated sparrow known to be frequenting the area, but no luck.
I have the 800 f11 but also the 150-600 C and 1.4 iii. Your results look pretty, pretty good to me. I'd been wondering how the combo you used would do, so I'm glad you reported this and I'll be following your posts if you do more.