Amadeo M Contax to LTM adapters

[#FT2_8*fffg.]

Had some bad luck a few years ago with ones from HK, it wouldn't focus correctly at close range. Since this march, I've been using a Nikkor f1.4 in LTM since then.

I'd like to use my Sonnar F1.5, because it was passed down to me. Has anyone used the newer Amadeo M adapters? His new auctions claim to have solved the close focus problems.

 

[Hacker]

Had some bad luck a few years ago with ones from HK, it wouldn't focus correctly at close range. Since this march, I've been using a Nikkor f1.4 in LTM since then.

I'd like to use my Sonnar F1.5, because it was passed down to me. Has anyone used the newer Amadeo M adapters? His new auctions claim to have solved the close focus problems.

Yes it does. It also comes with 6-bit code if that is important to you.

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=140204933333&ih=004&category=30063&_trksid=p3984.m106&_trkparms=algo%3DMESSL%26itu%3DSS%252BSI%26otn%3D4%26po%3DOp1%26ps%3D15

 

[former member]

Do you have the Zeiss-Opton Sonnar, or the Zeiss-Jena Sonnar?

Hard to tell from the back of the adapter, but the RF cam looks flat. To adapt a 52.3mm lens to work at all ranges on a Leica, the back of the cam has to have a shallow cut made in it. Roland (Ferider) made two of these, and I have his first. It works. i can put an unmodified Sonnar or Helios-103 onto it, and it works wide-open and at all ranges.

The second way of doing this is to make the RF coupling flat, and to shim it so the "sweet-Spot" is wide-open and around 8ft. Sonnar focus shift allows it to be used wide-open and close up and at infinity at F2.8 and beyond. (Buzz Lightyear lens).

The third way of doing this is to get the adapter and to shim the Sonnar to work properly wide-open and close up. Variation on this is to also move the rear group in slightly to reduce the focal lenght. It works.

I've done all three methods. The easiest is to get the adpater and to shim the lens for any residual error.

This is taken using the Post-Way CZJ Sonnar F2 on the Cut-Cam Contax to M adapter.

Wide-Open:

THis next shot is made with the Zeiss-Opton Sonnar 50mm F1.5 which has been modified to work on a Nikon RF. Shimmed and Focal Length changed, on the Straight CAM LTM adapter. This adapter works perfectly for Nikon S-Mount lenses:

 

[furcafe]

If the "amedeo" adapters do work close-up, I strongly suspect that he's basically done #2. I'm pretty sure that's the case w/both my Japanese Orion copy & Cook & Perkins adapters (though they're both still off @ closest focus), as they all have flat cams.

Do you have the Zeiss-Opton Sonnar, or the Zeiss-Jena Sonnar?

Hard to tell from the back of the adapter, but the RF cam looks flat. To adapt a 52.3mm lens to work at all ranges on a Leica, the back of the cam has to have a shallow cut made in it. Roland (Ferider) made two of these, and I have his first. It works. i can put an unmodified Sonnar or Helios-103 onto it, and it works wide-open and at all ranges.

The second way of doing this is to make the RF coupling flat, and to shim it so the "sweet-Spot" is wide-open and around 8ft. Sonnar focus shift allows it to be used wide-open and close up and at infinity at F2.8 and beyond. (Buzz Lightyear lens).

The third way of doing this is to get the adapter and to shim the Sonnar to work properly wide-open and close up. Variation on this is to also move the rear group in slightly to reduce the focal lenght. It works.

I've done all three methods. The easiest is to get the adpater and to shim the lens for any residual error.