I purchased this lens already converted; one of the questions that I asked was whether it focused to infinity and with the assurance that it did I closed the deal. Turns out it doesn't.
It focuses OK at about 150 yards when set to infinity. I have yet to take it apart and look for ways to bring the lens closer to the sensor. It came with one of the James Lao "4 lens" chips which I would like to replace with a single-lens chip. I'm wondering if anyone has info on thickness of various chipped bayonets, experience converting this particular lens, is there an adjustable stop for infinity, etc.
Markings are as follows:
Barrel: "Made in Japan"
Front Ring: "Carl Zeiss Sonnar 2.8/135 T* 6869037"