Negative for me:
- At the Pentax-variant, the distance scale is not up, but right on the side
(A problem of the T2 adapter?)
- The complete range is 3 m to infinity is crossed in a quarter of a turn
(A fine focusing is not possible)
- The focusing ring is rather sluggish
(You have the T2 adapter firmly tighten)
- The large case diameter makes use of 410PL-exchange plates from Manfrotto difficult because the locking lever abuts