thatkatmat wrote in post #5936782
This is an interesting topic, I too own and love the lens and have a UV12xx. But around f1.8 to f2.8 at very close distances it will exibit a shift of sorts.
I typically shoot it wide open to 1.6 close in like that so the issue rarely comes to play. If you expect to be shooting close subjects in the zone I spoke of, i'd think twice about this lens. You will see people either love it or hate it and the shift is 99% of the reason for this...I rate it as my favorite walkaround.
It'll probably do that occasionally, but I reckon that is because of the very limited DoF rather than the old focus shift problem, just like with any extremely large aperture lens.
With the focus shift problem it does it consistently, all the time, for those lenses that exhibited the problem. In my case that was all three I tried early last year. I found that with the 40D and close distances in combination with the UV07 and later specimens I tried, it would miss focus every 20th shot or so when close by at large apertures.
Kind regards, Wim