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- Scott
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Hi everyone, considering the above options to use with the Canon 90D for aviation, motorsport and wildlife. Would welcome any opinions/experience, as quite a big price difference.
I tried both and bought the canon. Even with a 1.4x TC mounted the images were better, and the focus felt quicker (on a 7d2). No regrets.
I had to tune the focus on my Sigma 100-400 as it was front focussing noticeably when I first got it. Going through that rigmarole was a few hours of my life I won't get back, but it's spot on now, so time well spent in the end, considering how unhappy I was with it before I bought the dock and tuned it! It's also good to have the ability to update the firmware too, which is another benefit of the USB dock system.I agree with ShropshireLad, just back of full zoom on the 150-600 a little as I often find this gives best results. The docking station will help fine tune the sigma bazooka and there are plenty of YouTube videos on how to do this. You need to do the tuning at various focal lengths and apertures.