cooltouch wrote in post #7112856
Did you manage to find your Sigma mirror in EOS mount, or are you using an adapter?
I know that there are EF mount models out there, but I am using an adaptor (no glass, mechanical only). I presume that the adaptor isn't perfect since the distance scale seems off a bit and I have to focus a little past infinity to reach infinity but it is close enough since it reaches.
Apparently the newer version of this lens that is a bit larger in diameter vignettes less. It really is kind of a circular hotspot though, not so much normal vignetting. Turning up the contrast makes it worse too. If I see one of the latest models with an EOS mount for sale reasonably, I may sell this one and try the newer one.
Birds in flight are possible. I used 1600 ISO to get a high shutter speed, then picked a big slow bird like this heron. I focused continously while tracking and whenever the focus seemed to really pop, I'd press the shutter. The lens was on a monopod.
It is a difficult lens. I probably wouldn't like it on film. At least here I have the benefit of raw capture and DXO to make my ISO1600 shots look not too bad.
This was the full frame. 1/1600s, f/8, 1600 ISO, 600mm. If the rings in the background are distracting, a quick wipe across the shoreline with the blur tool in PS will make it look normal.
I'll post a crop next
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