Thanks.  Should have thought of that as it also explains the mounting 
threads on the very bottom.
Chuck Norcutt
Mark Marr-Lyon wrote:
> Yes, it is a C/CS mount adapter. It's still used on many small video
> cameras, e.g. scientific or surveillance cameras.
> 
> Mark
> 
> On 4/30/05, BllPear@xxxxxxxxxxxx <BllPear@xxxxxxxxxxxx> wrote: 
> 
>>Looks like something I owned a million years ago for pentax screw mount 
>>lenses. I'm sure it's a C mount adapter for 16mm movie cameras. Don't we have 
>>some people on this list that have shot mp film since 1978? They could tell 
>>more accurately.
>>
>>Bill Pearce
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