Contax/Yashica & K mounts

Started Jan 21, 2008 | Discussions
SBS
SBS Senior Member • Posts: 2,559
Contax/Yashica & K mounts

Does anyone know if the Contax/Yashica bayonet mount will fit Pentax K mount cameras? There is only a .04 difference in the registers (flanges) of these two mounts. Thanks in advance.

Michael

Anastigmat Forum Pro • Posts: 12,675
Re: Contax/Yashica & K mounts

SBS wrote:

Does anyone know if the Contax/Yashica bayonet mount will fit Pentax
K mount cameras? There is only a .04 difference in the registers
(flanges) of these two mounts. Thanks in advance.

Michael

No they won't fit. A Contax lens will not mount on a Pentax K camera and a K mount lens will not mount on a Contax/Yashica camera.

steephill Veteran Member • Posts: 9,861
sort of

Read the text that accompanies the photo in this link

http://www.pbase.com/steephill/image/44705399

I have also found a website which shows how to modify the K mount to fully accept a C/Y lens and still allow full use of K mount lenses. I'll post the link tonight when I get home.

-- hide signature --
Anastigmat Forum Pro • Posts: 12,675
Re: sort of

I tried a Yashica ML lens on a Pentax ZX-5 body. I could not get the lens to fit into the body. After seeing your photo, I tried again, and I discovered the reason I could not do it. The aperture coupling cam of the ZX-5 body prevents the Yashica lens from being inserted into the body. Since the Pentax DSLR cameras have the crippled K mount, the aperture coupling cam is absent, so the lens can indeed be inserted into the camera body.

Here is a web site that shows how to convert a Contax/Yashica lens so it will mount securely on a K mount body:

http://www5e.biglobe.ne.jp/~leicaman/Kmount_PLAN.htm

It is in Japanese but the illustrations are excellent.

steephill wrote:

Read the text that accompanies the photo in this link

http://www.pbase.com/steephill/image/44705399

I have also found a website which shows how to modify the K mount to
fully accept a C/Y lens and still allow full use of K mount lenses.
I'll post the link tonight when I get home.

Anastigmat Forum Pro • Posts: 12,675
Re: here's the link

That is an interesting link, but it can be somewhat destructive to the Pentax body, especially if part of the body material is removed so the C/Y lenses can focus to infinity. I do not have any Carl Zeiss lenses, so I will probably not be doing any modification to my Pentax body any time soon.

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