This lens is amazing. You will not need a better-corrected lens than this. Unless you shoot UV. Then you need the lens on the Right.
When received, I noted the overall size was about the same as my Pentax 85/4.5 Ultra-Achromatic-Takumar (UAT). The latter is 50 years old, maybe 40 lenses known to exist today. It now sells for about 5 times what the APO-Lanthar cost. Amazing.
I bought the APO primarily for the M Monochrom, where CA cannot be corrected using post-processing software. I'm shooting mostly on the M9 as it does much better in cold weather. And it has been cold. Plus- most people want to see what an APO lens does in color.
After the first outing, I turned off lens profile on the M9. Any corrections applied in firmware would just degrade the image. It does well "just optically". Perfect for a film camera as well.
Focus is perfect on the M9 out of the box.
F2
F4
NO focus shift.
When received, I noted the overall size was about the same as my Pentax 85/4.5 Ultra-Achromatic-Takumar (UAT). The latter is 50 years old, maybe 40 lenses known to exist today. It now sells for about 5 times what the APO-Lanthar cost. Amazing.
I bought the APO primarily for the M Monochrom, where CA cannot be corrected using post-processing software. I'm shooting mostly on the M9 as it does much better in cold weather. And it has been cold. Plus- most people want to see what an APO lens does in color.
After the first outing, I turned off lens profile on the M9. Any corrections applied in firmware would just degrade the image. It does well "just optically". Perfect for a film camera as well.
Focus is perfect on the M9 out of the box.
F2
F4
NO focus shift.