Jump to content

CA-1 to PL adapter?


Recommended Posts

Has anyone had any experiences with the CA-1 to PL mount adapters that are floating around ebay? I've heard from other places that an adapter like this wouldn't allow for infinity focusing. Any other ways of getting a CA-1 lens on a PL mount camera?

Link to comment
Share on other sites

Quite right. The inexpensive adapters sold by an eBayer in The Netherlands do not allow infinity focus.

It may be possible to have a custom PL-mount made for your lens but again it will depend whether the physical dimensions of lens will allow such a modification.

 

Cheers,

Jean-Louis

Link to comment
Share on other sites

  • Premium Member

To say for sure, we'd have to know the flange-focal distance for the CA-1. I tried Google and Wikipedia, and came up empty.

 

CA-1 was never a good lens mount, it was tempermental and loose. So, if you have any CA-1 lenses, you have to decide whether to get them re-mounted, or preserve them as antiques.

 

 

 

 

 

-- J.S.

Link to comment
Share on other sites

To say for sure, we'd have to know the flange-focal distance for the CA-1. I tried Google and Wikipedia, and came up empty.

 

 

The CA-1 flange-focal distance is 48mm. Don't recall the mount diameter, but it is wider than the Arri std. & bay.

 

The PL and other Arri flane-focal distance is 52mm.

Link to comment
Share on other sites

  • 1 month later...

PL Mount is 54mm diameter with a FFD of 52mm

CA-1 Mount is 46mm diameter with a FFD of 48mm.

 

 

As already stated, an adapter to fit a PL mount lens on a CA-1 mount camera is not feasible - the lens is already too large to fit in the camera before you've put it in an adapter.

 

An adapter to fit a CA-1 mount lens on a PL mount camera might be feasible depending on the lens in quesion. The smaller diameter of the lens means there would be a 4mm wall thickness on the adapter, this just leaves the different FFD. To work perfectly the CA-1 lens seating surface needs to be recessed 4mm behind the PL mount seating surface ie. back inside the camera.

 

In most real world situations I suspect there won't be enough room to actually accomodate the back end of the CA-1 lens body within the available space. However, if you had a small enough diameter lens then it might be possible to get a custom adapter made. Really the lens body would need to be no larger than the CA-1 mount itself. Some of the bolex c-mount lenses seem fairly small diameter, so perhaps if you'd come across one of those which had been modified to CA-1 mount you might be able to get away with it, but I guess the chances of all that are pretty slim! :lol:

Link to comment
Share on other sites

  • 3 weeks later...

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
×
×
  • Create New...