In my collection I had a 75mm/1.3 Kilfitt Zoomar, http://www.kilfitt.org/Lenses/Zoomar_75.htm that I had never been able to use before. It is an odd lens that has both a C-mount and a Leica screw mount attachment. As I have not yet received the ordered C adapter, I tried attaching it to the G1 via the LSM. It turned out that I could not focus on anything, it needed a spacer. I am not very good with my hands, so I looked for the thinnest LSM extension ring I could find, a 17675 X that adds approx.10mm. It proved too long and set at Infinity the lens would focus at about 30cm.
I was impatient to get some results. Although this is not a macro lens, I decided to take an orchid at approx. 30cm . On the first image, I drew a black circle on the point I focused on.
The good surprise: it covers the whole sensor without any vignetting. Fully open, as is to be expected the DOF is minimal,
Zoomar 75mm on the G1 at f/1.3 - a bit on the soft side
Zoomar 75mm on the G1 at f/2.8 - already quite sharp
Zoomar 75mm on the G1 at f/5.6 - sharpness is excellent
I am looking forward to the C adapter, hoping that it will allow to focus correctly. On the other hand, I also wonder whether a C-mount adapter on the G1 will bear the weight of the lens, approx. 500g on my kitchen scale Otherwise I would need a thinner extension ring to continue using the LSM
I shall be glad for any tips.