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Thread: Petzval in Shutter

  1. #1

    Petzval in Shutter

    I have a projector lens that is a Petzval by examining the reflections from a point light source.
    If the thing is mounted with new barrel components to preserver the original spacing will the introduction of a shutter change its behaviour.
    These creatures were meant to be used wide open. Therefore even a ex Polaroid Copal without a diaphragm would be suitable.
    I think the focal length is way too short for full frame on 4x5. Am I bothered?/ Nah, I'd try it anyway!

  2. #2

    Join Date
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    Re: Petzval in Shutter

    I gather your Petzval is a very small one. Most of the breed would demand a much bigger shutter than a Polaroid Copal. I'd suggest a shutter with iris, though. Although projection lenses are used wide open, on a camera an iris can be very desirable.

    Using a shutter won't do anything to the image because at the time the image is forming the shutter blades are out of the light path.

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