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Kinoptik 5.7mm Lens Collimation


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#1 Kori Perez

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Posted 16 September 2008 - 11:42 PM

I have a Bolex SBM that will soon be modified to super 16.
I wanted a nice wide angle that covered S16 and I picked up a c-mount Kinoptik 5.7mm 1.8.

It is a fixed focus lens that seems to be a bit out of focus thru the viewfinder. I think it needs to be collimated (?). Images only come into focus when I use the lens like a macro up close and personal. I'm sure this problem is due to my reflex prism.

How would one go about fixing this problem?
Thanks!

Edited by Kori Perez, 16 September 2008 - 11:43 PM.

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#2 Mitch Gross

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Posted 17 September 2008 - 12:13 PM

Send it to a camera rental house that can mount a c-mount lens on a collimator bench.
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#3 Kori Perez

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Posted 19 September 2008 - 07:33 PM

Will a collimator bench be able to fix the issue?
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#4 Ken Hale

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Posted 20 September 2008 - 03:35 PM

Will a collimator bench be able to fix the issue?

I think that the best way to set this lens is by using a lens test projector.
Optimize your focus for 5-6 feet, and everything from 18 inches to infinity should fall into focus due to the hyperfocal distance of this lens.
I recommend sending your lens to someone that specializes in Cine lens repair.
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