Finally pulled the trigger on an SL2 for my Dolomites trip next month and I'm so stoked! I keep reading that the M 21mm Super-Elmar is the gold standard for sharpness but then others say the native SL 21mm APO is better corrected for the sensor. Which one is actually gonna give me the sharpest corners for big landscape prints?
> Which one is actually gonna give me the sharpest corners for big landscape prints? I'd really suggest sticking with the native glass for a trip as big as the Dolomites. I learned the hard way when I took my Leica Super-Elmar-M 21mm f/3.4 ASPH out to the Alps a few years back. On paper, it is a legendary lens, but the SL2 sensor has a thick cover glass that just doesnt play nice with M-mount optics, especially wides. I ended up with these weird purple color shifts and soft corners that basically ruined my larger prints. You might want to consider the weight, but if sharpness is the priority, the Leica APO-Summicron-SL 21mm f/2 ASPH is the only way to go. It is corrected to a level that the M glass just cant touch because it is designed specifically for that digital sensor stack. Make sure to check your weather sealing too... the native SL lenses have those rubber gaskets which saved my gear when a sudden storm hit me near Seceda. With an adapted lens, you are leaving a gap for moisture to crawl into the mount. I wouldnt risk a brand new SL2 with an adapter in mountain weather tbh. Just be careful about the size tho, it is way bigger than the M version, but for prints, you wont regret the extra glass.
