Firstly, I did mean .036\" or 36/1000s. That is almost a millimeter. Which in my mind is alot. One of my calibrated M to Sony E adapters is 9.78 millimeters thick. That one is my tried and true reference that gives hardstop infinity focus with either new Leica M lenses or ones just returned from New Jersey on a Sony E camera. I have another custom adapter that is off that by .001\" or so. I\'d say the variance of this adapter is +/- .001-.002\" from the theoretical thickness it needs to be.
The reason I mentioned the TAP thickness is because I am in the process of mounting a Nikkor-S on the TAP that doesn\'t have a helical, similar to the Heliar 40. I used my calibrated adapter with a custom mount for the Nikkor-S and with the TAP, it auto focused at infinity (confirmed with MF) and the chrome mount of the TAP extended out almost a millimeter.
I then shimmed the custom M mount of the Nikkor-S enough where after AF on infinity, switching to MF, there was no movement of the TAP at all. My TAP at infinity park is 9.42 millimeters thick. That\'s where I got the .036\" or .91 millimeters.
Furthermore, my just received Leicaist macro M to E adapter measured 9.63 millimeters thick, not as thin as the TAP, but thinner than theoretical and therefore should focus a M lens past infinity.
Firstly, I did mean .036\" or 36/1000s. That is almost a millimeter. Which in my mind is alot. One of my calibrated M to Sony E adapters is .978 inches thick. That one is my tried and true reference that gives hardstop infinity focus with either new Leica M lenses or ones just returned from New Jersey on a Sony E camera. I have another custom adapter that is off that by .001\" or so. I\'d say the variance of this adapter is +/- .001-.002\" from the theoretical thickness it needs to be.
The reason I mentioned the TAP thickness is because I am in the process of mounting a Nikkor-S on the TAP that doesn\'t have a helical, similar to the Heliar 40. I used my calibrated adapter with a custom mount for the Nikkor-S and with the TAP, it auto focused at infinity (confirmed with MF) and the chrome mount of the TAP extended out almost a millimeter.
I then shimmed the custom M mount of the Nikkor-S enough where after AF on infinity, switching to MF, there was no movement of the TAP at all. My TAP at infinity park is .942 inches thick. That\'s where I got the .036\".
Furthermore, my just received Leicaist macro M to E adapter measured .963\" thick, not as thin as the TAP, but thinner than theoretical and therefore should focus a M lens past infinity.
