8mm Forum: Thread size on Elf RM1 Lens

This is topic Thread size on Elf RM1 Lens in forum 16mm Forum at 8mm Forum.

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Posted by Alan Paterson (Member # 661) on April 15, 2007, 05:19 PM:

Does anyone know what the thread size is on the Kowa Super Prominar 16 1.3/50 fitted to the Elf RM1 projector.
It's less than 49mm and greater than 46mm, but I don't have a 47 or 48mm threaded filter to test it with.
I'm going to have to get a stepping ring to fit an add on Bell & Howell Filmovara zoom lens. The Filmovara takes a Series VII adaptor. I just need to know the front thread size on the Kowa.
Thanks
Alan

[ April 16, 2007, 04:24 PM: Message edited by: Alan Paterson ]

Posted by Alan Paterson (Member # 661) on April 22, 2007, 10:55 AM:

I've found that it's bigger than 48mm and less than 49mm.
Must be an old imperial thread.
However, a 48mm to 52 mm stepping ring with some Araldite on the thread did the trick.
You can easily get 52mm stepping rings to screw into that.

Just in case someone else has this issue.
Alan

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