I have an older Lumix 12-32mm that had a dirty inner lens element (significant flare/haze when there was any bright light in the picture).
I took it apart and cleaned it. Putting it together it is impossible to reverse lense elements as they are fixed into modules and slot together using various mechanisms.
After putting it back together, the haze was gone, but I noticed that most of the pictures were a bit blurry unless the F stop is high (>7+).
When I say blurry i mean that while the image looks passable on the preview screen, when I zoom in, I can't read text in the picture a few feet away. I am using this on a OM5 mki mounted on a tripod and i am comparing it using equivalent settings to a an olympus 14-42mm kit zoom and a lumx 14mm f2.5, where i can clearly read the text at the respective zooms and aperture and shutter settings. At the higher fstops, the clarity of the image rivals the other lenses. The same issue exists when I use a panasonic GF3 so it is not a cross compatibility issue.
I have taken it apart several times thinking maybe something was out of alignment but the design of it is pretty much idiotproof (it is possible my idiocy transcends this though, but i think the lens alignment is fine). All of the connectors seem in place and ribbons are intact to visual inspection. I cleaned all the connectors using alcohol.
It is pretty much impossible to use P or Automatic modes as they are always blurry. The only way to make it clear is to force the Fstop high using A mode (or S mode altering the shutter speed).
Autofocus seems to work ok (focusing on something closer / background yields clear pictures (assuming im keeping Fstop high). If i use a lower fstop, it is blurry but focusing on nearer objects seem slightly clearer than focusing on something far away.
All 4 corners seem to be equally blurry (no corners are sharper than others making me think it is not misalignment).
There is no signficant aberration if I shoot a white text on black background (fstop at 9).
What can i do further to diagnose the root cause of why my lense is blurry?
Why does it not work when I use P or A? is this a focus problem? is this a communication problem between the camera and lens? Or is this an inherent lens problem?
Thanks for any help and looking forward to your insights!
btw - this is a cheap lens so its not worth it for me to send out to a pro.. i'd like to take this opportunity to understand cameras/lens function even if I never get this to work correctly, it would be nice to fix it though!