rscheffler Offline Upload & Sell: Off
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Really lovely images!
I just sold my LTM version, but owned it for some time alongside a bunch of other rangefinder 50s. I also have the new 35/1.7, so am familiar with the ergonomics of the new 50/1.5's design. Let's just say it will be subjective and I'm in the pro-tab camp. For a while I was ambivalent about the need for focusing tabs, but have come around after some time using both types of lenses.
I change lenses a lot and my complaint about the 35/1.7 design, and by extension, the new 50/1.5, is that it's very difficult, if not impossible, to orient the lens by feel for a quick change. I have to look at it to line it up properly. It doesn't have the raised hemisphere bump nor many other cues. The Leica raised hemisphere, tab and often square lens hoods, make for faster changes. The tab is also very useful for presetting focusing distance in anticipation of potential photos. The feel of the tab's location at any position directly translates to a specific focusing distance. This might be more useful with rangefinder shooting and/or hyperfocal focusing situations. With a Sony camera you'll need an adapter properly adjusted for accurate infinity focus for the distance scale to remain accurate.
As for the 50/1.5's image quality... in the comparisons I did with the LTM version (same optical formula but different coatings) against the 50 Lux ASPH, it is very close in respect to background rendering, with the Lux being slightly smoother at near subject distances. The 50/1.5 is very sharp centrally but gives up a bit to the Lux in the outer areas. It also can purple fringe in wider aperture high contrasts transitions, whereas the Lux needs a lot more provoking to do so. The 50/1.5 Sonnars, new and old, are somewhat different lenses. More character driven. IMO, the Voigtlander is a pretty close competitor to the Lux and a great deal considering its price point.
If you're looking for a sharp 35, consider the 35/1.7. However, it does suffer from relatively strong field curvature induced by the Sony sensor stack design, which isn't a factor if using it on a digital Leica or, IIRC, a Kolari-modified Sony camera. The field curvature problem should be less of a factor for the types of images you've posted above where edge to edge sharpness isn't a primary concern.
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