Hi bought a Carl Zeiss Jena DDR Flektogon 2.8/20mm M42 and K-x yesterday and am disappointed.
I don't know if the lens is broken or not compatible with the K-x.
I got the M42 adapter from a Pentax store it's from the HOYA corporation Japan.
The problem is when I screw the lens all the way in the focus will be somewhat infinite on short ranges. Between 1 -5 meters everything is pretty sharp but nut really. So I can run video and don't need to focus and it looks somewhat fine but not brilliant.
When I want to focus anything like 19cm or 25 centimeter it's impossible. Turning the on the sharpness does not change anything.
When I loosen the lens from the adapter about 2 complete turns I can focus 19 cm and focusing seems to work.
When then taking pictures with an aperture of 2.8 only the center is sharp the edges become very blurry.
At aperture 8 everything seems to look fine.
Any suggestions?
Here are some crops and shots made with the lens unscrewed.
Aperture 2.8
ISO 200
Aperture 8
ISO 200
Aperture 8
ISO 200
Aperture 2.8
ISO 200
Aperture 2.8
ISO 200