I don't know. Am I getting older? yes. Is my eye site getting worse. Weill it was but I had cataract surgery and things are great now. So, why am I having such a difficult time focusing my 75 APO Summicron on my M11's. It was never this difficult with the M10. So, is that 60mp sensor really unforgiving or is it theoretical? I mean, some are spot on focus some are not.
No. It really isn’t. The issue is purely related to output size. MP doesn’t matter, except that we tend to look at images critically at 100% in LrC or whatever your poison is. So you’re magnifying the image more during critical inspection.
If you’re seeing an issue at the same output sizes of your old cameras the likely culprit is calibration tolerances between the body and lenses.
Two of the images are clearly out of focus and at this tiny viewing size it would have been visible with 15 mpix too. So it has nothing with the sensor resolution to do.
With the EV1, I no longer have focusing issues like I used to have with the RF. I do not use Focus peaking as it is just not accurate enough with an M for me. However, magnification is terrific to nail focus.
stgrove wrote:
With the EV1, I no longer have focusing issues like I used to have with the RF. I do not use Focus peaking as it is just not accurate enough with an M for me. However, magnification is terrific to nail focus.
Could some of your subjects been moving?
Curious about this, is focus peaking not being accurate. Is it a consistently inaccurate that you could calibrate (your eye not the camera) to where it becomes the most accurate?
I’m relatively new to this lens, but on my M11 Monochrome the resulting RF image survives pixel peeping. So, may be time to shoot on a tripod with a static image comparing RF vs LCD/Visoflex.
bwcolor wrote:
I’m relatively new to this lens, but on my M11 Monochrome the resulting RF image survives pixel peeping. So, may be time to shoot on a tripod with a static image comparing RF vs LCD/Visoflex.
Curious you mention this issue with the 75mm apo M, I had the exact same issue with my m11. Critical focus was just difficult and moderate distances. It focused fine with live view or Evf. When looking at the rangefinder patch it looked aligned as well. It just is slightly off sometimes so sharp focus was very hit or miss, a 50 1.4 and 90mm 2.8 lenses did not have this issue. I can’t really explain it but the 75mm was jsut very difficult to deal with for focus on the rangefinder. I even tried a magnifier and that helped a bit. I think this lens with the DOF just really needs higher mag and very precise focus.
Don't have an M11, but just acquired the M EV1. My answer to your question is yes, the 60 mpx sensor is unforgiving of any misfocus or camera movement. My rangefinder M bodies are 24 mpx and shutter speeds that produce sharp images with them consistently produce (properly focused) soft images on my M EV1. Leica recommends that shutter speeds be at least 4 times focal length for this reason. This oftens puts me at ISO levels where noise becomes a factor. I wish that Leica did with the M series what it does with the SL series and always keep a 24 mpx version in the line up. Especially since the SL cameras have IBIS, so slower shutter speeds are not an issue. I'm not advocating for IBIS in the M. That would require making the body thicker like my Typ 240.
That said I love my M EV1 and deal with the issue in several ways. If light is good I apply the 4 times focal length rule. If the light requires me to use slower shutter speeds I will either go to 36 mpx mode which hides much of the camera shake/misfocus blur/noise, or process the blur in Topaz Sharpen Ai which can usually eliminate it without affecting image quality. Most or what I photograph ends up in web galleries and at web gallery resolution the image blur from camera shake or slight misfocus is not visible.
The take away is the 60 mpx Leica sensor will reveal on my 4K monitor faults in my technique that can be mitigated, but in most cases can be ignored since they will not be seen in the final output. YMMV
If the issue is blur other than missed focus, on the M11 it really requires 1/4x focal length for the shutter speed, I have tried less but it alway has blur. It’s penalty due to the close open close open shutter in the m11 and no efcs option. It’s jsust nearly impossible to get fully sharp results and negate the shutter shock without the high shutter speed.