Sankyo Tele Converter x1.5

[jenr07]

I apologize if this is not the right forum for this question, but I wanted to ask about a lens I bought at a estate sale.
I have a Sankyo Tele Converter x1.5 with crystal clear optics.
It has a screw-type mount.
I am wondering if it isn't actually for a movie camera rather than still.

Are you familiar with this lens?

Thanks in advance!

Pictures:

 

[harry01562]

not really the place

not really the place

This isn't really the place for a general question, but Peter has been very generous with his knowledge. I'd pose a question to you.... what is the approximate diameter of the small, threaded end? If it's about an inch + then it is designed for 16mm movie cameras. It's called the C-mount. If larger than that, it could be several possibilities.

Harry

 

[jenr07]

Thanks and sorry

Thanks and sorry

I came across this forum while doing a Google search about this lens, and thought I'd try it out -- if there are any recommendations for alternate forums I'd be grateful!
I measured the diameter of the threaded end of the lens -- it is 2 and 1/8 inches, so I am guessing that it isn't a lens for a 16mm movie camera. 😕
Thanks for your response, it is appreciated!

 

[nodyad]

The lens pictured is an afocal auxilliary converter, not a true "prime lens." It can be used for any camera for which the rear thread of the converter fits the filter thread on the existing lens. The telephoto effect is moderate, and the quality will depend greatly on how closely it fits up to the original lens and how you use it. If you adapt it to a zoom lens, use the zoom only in its already-longest position. Stopping down may improve some of the softness off center that is common with auxilliary lenses. To figure out the telephoto equivalent of adding this lens, multiply the longest focal length on your lens by 1.5 (that's what the "X1.5" on the side is meant to convey).

These are popular accessories becaue they are the only way to extend the functionality of fixed-lens cameras, whether video, digital, or 35mm. But if you really need more than moderate extension of the telephoto effect, you might be better off saving for a camera with better future options (one that has a longer zoom range, or that allows interchanging lenses in order to fit longer "prime" telephotos, which will always have better quality imaging properties).