Thanks for the tip. My Rafcamera adapter only allows me to add shims to move the lens further away from the camera, not closer. I removed the six screws that hold down the stainless steel ARRI bayonet mount "bell" and added four pieces of Scotch Matte tape to move the Vario-Sonnar 10-100 F/2.8 lens closer to the sensor. This modification allows the bayonet "bell" to sit deeper into the Rafcamera adapter. It seems to have infinity focus now.
As you can see in this picture, the lens extends toward the camera's sensor. Due to this extension, you cannot use an ARRI B to EOS adapter with this lens, but it works fine with M4/3 cameras.
With two pieces of Scotch Matte tape as shims I took these pictures in Blackmagic Raw 3.1 on my BMPCC 4K a couple of days ago.
In the 2.6K sensor area at a focal length of 32mm and the aperture at T4, I shot this picture at the MH DeYoung Museum at Golden Gate Park from 12 feet away. This is where it starts to vignette and it is clean from 50 to 100mm.
In the HD sensor window at a focal length of 20mm and the aperture at T4, I shot this picture.
I attached a a CAVISION CR82-75 72mm to 82mm Clamp-On step-up ring, then 82mm to 77mm, 77mm to 72mm, and 72mm to 67mm step down rings and mounted a Vormax Compact 1.33x ver. 1 anamorphic adapter. I have the ver. 4 on order and I hope that it will improve the chromatic aberration issue. This adapter prefers a sharp lens.
Here is a lens test I did with the Zeiss 10-100 Zoom at Golden Gate Park a couple of days ago with just the two pieces of tape for the back Focus adjustment with this combination, shot in HD at 25mm and the aperture wide open at T3.3, using a monopod. I focused on the tree trunks 15 feet away. That is why the foilage at the start is a little soft. The anamorphic adapter greatly reduced the depth of field.
I'm happy with this lens. I have money left over for more other gear since the cost is comparable to a Meike M4/3 Cinema prime. At 160mm long, 75mm wide, with a weight about 1 kg., it's much easier to handle than it would be if it was a larger adapted Super 35 lens at equivalent focal lengths.