I've got the 90 macro elmar, but no macro adaptor.
My thoughts, for what it's worth........
As a compact 90mm lens, it's absolutely superb, if f4 is fast enough for you. For me, it's fine, and therefore it's a really compact and great lens that with the 35 'cron is my main take everywhere kit.
I didn't buy the macro adapter because a) it's ludicrously expensive, and b) it's not **really** all that macro.........
It allows the lens and camera to focus from 0.77m (from the manual, not measured.... 🙂 ) down to 0.5m, with a reproduction ration of 1:3. Better than any "normal" rangefinder lens, but still not all that useful for true macro photography. And the adaptor alone costs more than half again what the lens does.
I love my Leica, and it's going to have to be prised from my cold dead hands, but I know it's shortcomings - if you really want to do macro work - use an SLR.
Saying that technically you can do it is true, like saying that using a visoflex you can use 300 or 400 mm lenses. Sure you can, but there are better tools for the job.......
Of course, YMMV...........
:angel: