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Thread: Computar 270mm F9

  1. #1

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    Computar 270mm F9

    I was able to rescue this lens from possibly going to the scrap heap mounted on a process camera. I canít find much info on it other than it has some pretty good coverage for a smaller lens. Any info would be greatly appreciated. Didnít come with a shutter only a lens cap...which is perfect for me. Lol. Click image for larger version. 

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  2. #2

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    Re: Computar 270mm F9

    https://grossformatfotografie.de/att...-brochure-pdf/

    https://web.archive.org/web/20190718...-brochure-pdf/

    Even the serial of the lens in thedatasheet (500616) is close to the one in your glass...

  3. #3
    Do or do not. There is no try.
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    Re: Computar 270mm F9

    Great find! Huge coverage, I think 95 degrees at f/22. It fits a Copal 3S shutter.

  4. #4

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    Re: Computar 270mm F9

    Quote Originally Posted by Steve Goldstein View Post
    I think 95 degrees at f/22.
    I guess that datasheet says 72ļ wide open, 86ļ if well stopped, translation from japanesse is not perfect

  5. #5

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    Re: Computar 270mm F9

    Hmm. You may not be aware of this site's resources. One of the harder resources to find is the link in the first post in this https://www.largeformatphotography.i...mainly)-lenses discussion. That link will take you to a downloadable list of links to useful information, including to a discussion of f/9 Computar lenses in this very forum.

  6. #6
    ic-racer's Avatar
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    Re: Computar 270mm F9

    it has some pretty good coverage for a smaller lens
    If you are using it as an enlarging lens, I suspect it will work well with 5x7" format. Is that what you found?

  7. #7

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    Re: Computar 270mm F9

    I accidentally duplicated my thread

    Moderator's note: threads merged. -- Oren

  8. #8
    Corran's Avatar
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    Re: Computar 270mm F9

    Should be in excess of 500mm, maybe even enough for 8x20...
    Bryan | Blog | YouTube | Instagram
    All comments and thoughtful critique welcome

  9. #9

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    Re: Computar 270mm F9

    whoa.. That would be awesome. Im going to have to try and mount it on my 8 x 10 and do some landscapes.

  10. #10

    Re: Computar 270mm F9

    Quote Originally Posted by Corran View Post
    Should be in excess of 500mm, maybe even enough for 8x20...
    I owned one of the 270mm Computers in barrel and can confirm that in fact it did cover 8x20. Once I acquired the 305mm F9 Computar in Copal #3 (which really cover this format with plenty of room to spare) the 270mm was sold.

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