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Adapters for Nikon and Contax/Yashica glass on Sony/Minolta?
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PostPosted: Thu Dec 02, 2010 4:15 pm    Post subject: Adapters for Nikon and Contax/Yashica glass on Sony/Minolta? Reply with quote
Why can't these be made? Why?! Why?! Why?! Why?! Crying or Very sad

Register distance of Sony Alpha/Minolta AF is 44.6mm.

Nikon is 46.5mm, C/Y is 45.5mm.

Canon EOS, at 44...which easily takes Nikon and C/Y adapters, and with a little shaving and adjusting, Exakta lenses too, at 44.7mm, so it seems you should be able to make an adapter if the register difference is 1.5-2mm. Is there some mount obstruction with Sony/Minolta?

Source of info: at this link

I'm going to be in the market for a new dSLR early next year, preferable full frame, and the Sony A850, with it's in body image stabilization is so very tempting...


PostPosted: Thu Dec 02, 2010 4:26 pm    Post subject: Reply with quote
I'm not sure an adapter 0.9mm thick is going to last very long TBH!

Adapters exist for Canon->Exakta but they are too thick to allow infinity focusing. They need to be thicker as they're not strong enough otherwise, as far as I understand it.

Have you looked at Leitax mounts for MM coupled C/Y lenses?


PostPosted: Fri Dec 03, 2010 3:22 pm    Post subject: Reply with quote
ManualFocus-G wrote:
I'm not sure an adapter 0.9mm thick is going to last very long TBH!

Adapters exist for Canon->Exakta but they are too thick to allow infinity focusing. They need to be thicker as they're not strong enough otherwise, as far as I understand it.

Have you looked at Leitax mounts for MM coupled C/Y lenses?


The Exakta/Canon adaptors vary wildly across samples as far as thickness goes. I've got 3 different styles and one is VERY close. Luckily I'm fairly lens-savvy so I then adjusted the infinity focus so I'm good to go. To get a good Exakta/Canon adapter thin enough and strong enough requires stainless steel, which is strong, but much more difficult, which means expensive, to manufacture. Brass or aluminum don't cut it. I had worked with a master machinist to get see if I could get a run...and he quoted US$300 each for stainless steel! Alas, I could not afford...so I just adjusted infinity focus for my set of prewar Zeiss/Meyer/Schneider lenses.

My C/Y Zeiss lenses are not MM, alas...so the Leitax route means selling my AE lenses and purchasing MM if I go to Sony.

I still don't understand why Nikon lenses can't be adapted tho'. There's 1.9mm difference...must be some protrusion or something?
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