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Zeiss lenses, c-mount for Bolex


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#1 Eugene Lehnert

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Posted 28 July 2005 - 02:12 PM

I purchased a 25mm Zeiss c-mount lens off of Ebay. As it turned out it is a macro lens, but what a lens it is! It's really sharp and crisp. The color almost seems more saturated! Anyway I'm trying to find more c-mount Zeiss lenses for my Bolex. Does anyone know where to look? I can't find anything on Ebay right now. I got this on from Slovakia for $50. Any ideas?
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#2 Robert Morein

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Posted 29 July 2005 - 03:44 PM

Is your Bolex reflex (H-REX), or non?
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#3 Eugene Lehnert

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Posted 30 July 2005 - 04:36 PM

I have a reflex SBM Bolex converted to Super16.
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#4 Robert Morein

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Posted 01 August 2005 - 06:17 PM

Then you really should not use Zeiss lenses.
People keep asking this question over and over.
See http://www.city-net....olex/truth.html

As far as I know, Zeiss never made any of the special lenses required by RX Bolexes to compensate for the prism.

Switars are lenses of great optical reknown. The RX Switars were designed for your camera.
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#5 Eugene Lehnert

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Posted 02 August 2005 - 05:19 PM

I understand for the most part why I shouldn't use any lens but an RX but I have recently shot footage with this lens and the footage looks quite nice and sharp but with a very narrow depth of field. I originally thought the lens was a standard 25mm lens but I can only focus the lens a few inches from the camera so I thought it might be a macro lens. Could this macro effect be caused by the fact that it isn't an RX lens?
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#6 Eugene Lehnert

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Posted 02 August 2005 - 05:34 PM

I guess this lens must fall within the boundaries that allow it to work alright with RX Bolex cameras?

Maybe I would see a difference if the footage were blown up on a big screen?
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#7 Sam Wells

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Posted 03 August 2005 - 09:02 AM

  Could this macro effect be caused by the fact that it isn't an RX lens?

<{POST_SNAPBACK}>


Yes, it's further from the film plane than it was designed to be.

It could possibly be adjusted to have the proper rear focal distance but this would not correct for the aberrations the prism would introduce.

You'd have to weigh that against the performance of the lens in general.
Stopped down it might look OK.

(If you can only focus a few inches from the camera it's clearly NOT "within the boundaries that allow it to work" !)

What he said re RX Switars.

-Sam
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#8 Eugene Lehnert

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Posted 03 August 2005 - 10:05 AM

I have a 10mm Switar and a zoom so I'm find there. The stuff I have shot with this lens looks really interesting. What kind of aberations could there be that I am not seeing?
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