Re: [Frameworks] single perf through double perf

From: Pablo Marin (email suppressed)
Date: Mon Jun 28 2010 - 17:02:56 PDT

Thanks David,
well, this camera has double sprockets but single perf claw. it has the silvery speed knob, also, as you noted.
what about removing the sprocket part and filing out (smoothing out) the extra side? anyone has ever tryed that?

--- On Mon, 6/28/10, David Tetzlaff <email suppressed> wrote:

From: David Tetzlaff <email suppressed>
Subject: Re: [Frameworks] single perf through double perf
To: "Experimental Film Discussion List" <email suppressed>
Date: Monday, June 28, 2010, 5:49 PM

On Jun 28, 2010, at 4:25 PM, Pablo Marin wrote:

> hello all,
> a simple question that i'm sure has been made here before: is 
> possible to run single perf 16mm in an old bolex with double perf 
> bolts (or whatever their name is)?

I assume you mean sprockets? Anyway the answer is NO.

> Can those bolts be replaced?

Yes, if you can find the parts. But a camera with double-perf 
sprockets probably has a double perf claw. Single perf film won't work 
with that either, and replacing or modding the claw is not so easy. 
I've done it on a Filmo, but they're easy to take apart. A Bolex, not 
so much. Also, any Bolex old enough to have a double-perf claw, would 
I think, be so old as to predate the Bolex 'registration claw' 
movement, and I'd guess it would be more efficient to just look for a 
newer body than try to fix up that old one.

The tell-tale sign is the cameras with the old movement have an all 
silver speed setting knob, and the ones with the newer mechanisms have 
a black-ish speed knob.

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