Leonard Shepherd
Veteran Member
Plus 1.Many people didn't like it because they didn't understand how to use it.
Digressing lenses like the Plena combined if wanted with image "softening" in front, behind, around or of the subject in post are much, much more flexible with higher image resolution and better starting point bokeh than when the 105 D was introduced a long time ago.
It does not AF on ML bodies.
Overall as a former owner my view is it is best consigned to history unless budget and lower second hand prices are the major issue.
Like many older lenses it can produce image quality that was good toward the end on last century though no longer IMO a front runner.