Jason Lu

I think it's a problem with the rear lens group. There is a cemented lens, a lens and a ring inside

Hi. I recently got a Cooke lens from a friend. He said this lens was broken and couldn't focus, when I mounted it on my arri16s to test it I found that the lens wouldn't focus in the correct position, but the lens would focus when it was taken out of 10mm, I disassembled the lens and found that there were marks on the inside that someone else had taken it out of place so I suspect that one of the lenses had been mounted in the wrong position. Does anyone have a database of this lens or a picture of the lens position, any info would help!