Originally posted by kenafein Are you a fan of any of the other Isco lenses?
The only other I could afford is an Isco Westar 100/4.5, nice but not magickal. I *am* a fan of lenses from Isco's parent company, Schneider. Most available Schneiders won't work on Pentax without a bit of work, or an expensive adapter. But Schneider enlarger lenses work fine on bellows and can be found cheap.
And another of my don't-leave-home-without-it lenses is the absolutely incredible
Schneider Betavaron 50-125/4-5.6 enlarger zoom. (Actually it's marked as Betavaron 3,5...11/0.08 Schneider-Kreuznach.) Brutally sharp, quite dense and heavy. Only 5 aperture blades but creamy smooth bokeh -- maybe 2 pounds of glass helps there, eh? List price: US$3500. A couple years ago a USA liquidator was offing them at US$70 NIB. I couldn't resist and I'm HAPPY HAPPY HAPPY! I really need a 30-50mm focusing helicoid to get the most out of it, but when I mount it on about 32mm of tubes it's fine for general work.
The aperture isn't marked with f-stops, but as 1-2-3-4-5. The focus scale isn't marked with distance but with reproduction ratios: 3.5-4-5-6-7-8-9-10-11. It's extremely weird to use: Focus by zooming, so far shots are at 50mm and closeups are at 125mm. Focusing means reframing, so grabbing any shot involves dancing back and forth a bit. See the world in an entirely different way! A helicoid will tame it somewhat. But helicoids are costly, and aren't available in 30-50mm or 30-70mm or anywhere around there. If I can just get hold of a cheap junky macro-focusing TC, any mount...
ObTopic: You can't go wrong with the SuperTak 35/3.5.