Contax T 38mm on Sony A7II and A7RII Part II (updated - 2019)

I converted the Contax T 38mm lens into E-mount (using a metal 55mm cap and 55mm-to-E adapter in latest version, not the plastic cap) year ago.  It seems that it is better to plant the lens onto a LTM (Leica Thread Mount) so I can use this lens on my Techart Pro LM-EA7. it is not that difficult to make this modification and what you need to have are :

1.  33mm hole saw (a 1mm wider than the lens)
2.  LTM body cap
3.  Scotch Rubber Splicing Tape 23

It is a bit difficult to hold the cap when you drill the hole and here is trick.  Drill two smaller holes besides the holding bit hole and screw the cap onto a wooden board.  Using WD40 as lubricant when drilling the hole.

Fitting the lens onto the cap is straight forward.  Using Scotch rubber slicing tape and hot glue to set the lens position temporarily. Check the centering and focus.  Once ready use epoxy to fix the lens onto the cap.

Now I have the auto focus Contax Zeiss 2.8/38.   Here is some examples on A7II

f/2.8 (no pro-process and click the image to see the actual )

F/5.6

f/2.8

UPDATE:   Contax T 38mm on A7RII

Sony A7RII has a  BSI-CMOS sensor which gives a better corner performance with legacy wide angle lenses. The below images were taken with A7Rii at f/5.6