I'm done with September and time to do wrap up of the month. Focal length was bit difficult for me. On FF I found 28mm to be too wide and not wide enough at the same time
The lens... Usable from wide open, but in typical way gets sharper when stopped down. For landscapes f5.6 is enough to provide corner sharpness, but there is some vignetting on FF even at f8. When set to infinity everything is sharp from around 3m at f8, so pretty easy to snap casual shots. Didn't push for starbursts as this lens is not as good on those as M28/2.8. Sharpness is good enough, but nothing to get stoked about.
Now that I'm done with this lens on SIC, I think I could put it on sale. I find both M35 lenses better for me. I think they perform better and, I like that focal length more. If I keep 28mm on the shelf, it will be M28/2.8 due to better starbursts and PF performance, but even that would get in my camera bag only in rare occasions.
I go into october SIC with K1ii and M100/4 macro.
Wide open:
f4:
f5.6:
f8: