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Using vintage 16mm lens with Original Blackmagic Pocket Cinema Camera

iKokomo

Member
Joined
Oct 16, 2017
Messages
12
Photography Experience
Intermediate
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Edit my images ?
Yes (recommended)
I know this is more of a video question, but maybe someone here knows about using this vintage lens?

I found a Rainbow TV Zoom Lens H6X8 8-48mm 1:1.0 1/2” C Mount Lens at a thrift-store that I would like to use with my 1st generation, 1080p Blackmagic Pocket Cinema Camera with a Super 16 sensor.

Whenever I use it there is a massive vignette and it is impossible to focus without closing the aperture all the way down.

I know I need some sort of adapter, but I was wondering which adapter I needed?
 

BrianS

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Jan 20, 2020
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The vignetting can be explained: this lens is intended for a 1/2 inch (12mm diagonal) sensor, the sensor in your camera is 12.48mm x 7.02mm ( I looked it up). C-Mount is not "completely standard". There is "compact c-mount" with a shorter back-focus. This will probably not work on the mu43 mount. C-Mount lenses made for 16mm movie cameras typically have the longer back-focus to clear the prism used for reflex viewing. Standard 16mm is smaller than your Super-16 sized sensor, but should not vignette too bad. Lenses made for 2/3" and 1" sensors should work.

I used a couple of C-mount lenses made for 1" sensors to my u43 Olympus E-P2. "not bad", but I ended up giving them away to a friend.
 
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