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My OM 85/2 (third version) arrived and I tested it out for shift. On the X-T2, it's a very fine lens. As is widely know, it's soft at f/2, better at f/2.8, very good at f/4 and excellent at f5.6 and f/8. I'd use it without hesitation at f/11 if I needed the depth of field. At f/16, diffraction soften the image a fair bit, but it's still sharper than f/2.
For comparison, I shot the same target with my Fuji 90/2. The Fuji is a phenomenal lens and is sharper at every aperture. But I was surprised to see that at f/5.6 the old Oly 85/2 is very, very good -- amazingly good actually in comparison to what is one of the very best Fuji lenses. At only 260g I can see carrying the Oly around when the Fuji is just too much.
OK, now he shift test results for the Oly 85/2:
* At 5mm shift, in the shifted edge, it's good at f/5.6 and very good from f/8 to f/11 right down to the edges. (It's not great a f/4, and just plain bad at f/2 and f/2.8)
* At 8mm shift, it's OK at f/8 at the bottom of the shifted edge and a bit better at f/11 (but it's not great). I'd use it shifted 8mm at f/8, but I'd pay careful attention to what's at the shifted edge.
* At 10mm shift, f/8 is barely usable down to the shifted edge, while f/11 is potentially OK if you make sure you don't need fine detail there (e.g., clouds and sky would be fine).
All of these shifts are in portrait orientation, so the "shifted edge" is the long edge.
All in all, this lens is not as good for shifting on the Fuji X-T2 as other OM lenses (see above posts). But it's a very nice light lens (260g).
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