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#1 jeff wedding

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Posted 23 November 2007 - 01:07 PM

Hi. Does anyone happen to know the screw-on filter thread size for step-up rings, etc. for the 10mm & 25mm C-mount Switar lenses for use on a Bolex? The lens caps are the same size, thus the filter thread size would be the same. I have several step-up rings, which none of them fit and I cannot find these specs anywhere online. Any help would be greatly appreciated.

P.S. I've measured the threading myself (which most certainly could be wrong) and I've come up with the neighborhood of 32mm. However, I can't be sure until I actually get something to screw on. Thanks to all.

jw
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#2 Jean-Louis Seguin

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Posted 23 November 2007 - 01:43 PM

Hi. Does anyone happen to know the screw-on filter thread size for step-up rings, etc. for the 10mm & 25mm C-mount Switar lenses for use on a Bolex? The lens caps are the same size, thus the filter thread size would be the same. I have several step-up rings, which none of them fit and I cannot find these specs anywhere online. Any help would be greatly appreciated.

P.S. I've measured the threading myself (which most certainly could be wrong) and I've come up with the neighborhood of 32mm. However, I can't be sure until I actually get something to screw on. Thanks to all.

jw




Hi,

It is 32mm but you will find it very difficult to find anything that size on the market.
Check out this guy: http://www.brentfinley.com/switar.htm
He sells an adapter. I have purchased from him before and he is very reputable.

Cheers,
Jean-Louis
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#3 jeff wedding

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Posted 23 November 2007 - 03:14 PM

Thanks very much. I will most certainly check him out.

Best,

jw

Hi,

It is 32mm but you will find it very difficult to find anything that size on the market.
Check out this guy: http://www.brentfinley.com/switar.htm
He sells an adapter. I have purchased from him before and he is very reputable.

Cheers,
Jean-Louis


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#4 marc barbé

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Posted 24 November 2007 - 05:32 AM

Thanks very much. I will most certainly check him out.

Best,

jw


Hi,
Check out e-bay. 32mm step-up rings are hard to come by, but a 34mm slip-on adapter (to series 5 filters or bigger) would do the job.
Regards,
Marc.
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