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Beaulieu R16 & Canon Zoom Lens Vignetting?


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#1 Ian Cooper

Ian Cooper
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Posted 10 August 2008 - 06:52 AM

I've recently bought a Beaulieu R16. I haven't passed any film through it yet - which would obviously answer my question, as I'm sending it off to have the three lens turret plate replaced and give it some TLC first.

The lens on the camera is marked "Canon TV Zoom Lens V6x18", it is a 18-108mm f1.6 zoom and a fairly large heavy lump of glass! Looking through the viewfinder everything appears OK, but as you start to close the aperture down from f1.6 towards f16 the image appears to vignette, with the centre of the viewfinder remaining brighter than the edges!

I haven't seen this before on my K3 or various stills cameras, and when I put a 12.5mm lens on the Beaulieu it doesn't appear to happen with that either.

Is this just a quirk of the viewfinder system, or will it be repeated on film?
Does anyone have any experience with this lens? - A google search doesn't appear to throw up much information about it.

Searching around the web seems to suggest lenses will vignette more when the aperture is wide open than when they're stopped down a bit, so what I'm noticing is puzzling me a little!


Regards,
Ian.
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