Hmm, interesting. In 35mm, I have a Nikkor 35/1.8 LTM, Canon 35/1.5, UC-Hex 35/2 and Summaron 35/2.8. One will probably have to go to help fund the M9. Which would you part with?
Ari,
Only last week I owned a 35/2.8 Summaron, and I may have to buy another one.
This particular Summaron was sold to me at an insider price, I sold it to another friend at the same insider price, and later bought it back, but most recently I sold it back to the original owner as part of a camera deal. Yeah, I'm known to day-trade cameras an lenses. LOL.
Because I own a Monochrom it became very easy to perform lens testing between the 35/1.8 Nikkor, the 35/2.8 Summaron and my 35 Lux ASPH Pre-FLE.
As you know the Nikkor has this special rendering and glow to the highlights wide open and at F2, but at F5.6 the Summaron has this center sharpness that is as sharp as any modern Leica ASPH lens, but don't expect sharp corners like a modern lens.
On my Monochrom the lower contrast of the single coated lenses is a great asset that provides enhanced midrange, and I have found that the use of yellow filters can tame or eliminate clipping on the Monochrom so that almost no post processing is required. As a result there is a more organic quality and I think better highlight detail as well as less digital artifact because contrast and exposure is not amped up electronically bringing up the noise.
The Nikkor has a very special rendering that is truely magical on the Monochrom, but because the slow Summaron has less need of optical corrections it rivals any modern ASPH lens except in the corners.
For me the 35 Lux compresses the contrast too much in that it lacks the 120 like midrange of the single coated glass, and this modern glass does not make as wide/broad a histogram.
The problem I have with my black Canon 28/3.5 or other retro LTM Canon glass is the lack of and hard to find filters. It seems that those 40mm filters are a hassle to find. From what I know the UC-Hex is almost a clone of the Nikkor, and it might have better ergonomics or a closer focus.
Of course my advice is strictly limited to the lenses I own or have owned and how they relate specifically to the Monochrom. Also be aware that the 0.68 VF'er on digital M-bodies seems to favor 35mm FOV, but I also find that the 28 Cron is an exceptional lens on the Monochrome. Very different than a 35 Lux ASPH Pre-FLE.
Raid,
Sorry for going off topic.
Cal