Keith
The best camera is one that still works!
I have the M Hex 35 and it's a pretty good lens for what you can pick them up for ... I've thought about the UC but the price has been rather high and they aren't easily found.
The M version is sharp, has smooth OOF rendering and is near impossible to make flare ... I've shot mine straight into lights and directly into the sun and it doesn't seem to faze it at all ... BUT ... for me it doesn't have a lot of character so it tends to get ignored while I use my 35mm Nokton for almost all my 35mm shooting in spite of it's size disadvantage and extra weight.
The M version is sharp, has smooth OOF rendering and is near impossible to make flare ... I've shot mine straight into lights and directly into the sun and it doesn't seem to faze it at all ... BUT ... for me it doesn't have a lot of character so it tends to get ignored while I use my 35mm Nokton for almost all my 35mm shooting in spite of it's size disadvantage and extra weight.