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Thread: Rapid View Portrait (RVP) Pictorial lens

  1. #81
    Mark Sawyer's Avatar
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    Re: Rapid View Portrait (RVP) Pictorial lens

    Congratulations! As there's nothing behind the mounting threads to grab onto on these, you need a flange or an iris mount. You could try making a tight-tolerance lensboard hole that you can thread it into, but I'd also tie a good cord around it and secure that to the lensboard, just-in-case.

    The Cooke mounting rings were a standard (for them) 13 tpi, were usually engraved TTH, and came in quarter-inch-diameter increments, so you might look around a little before having one made...
    "I love my Verito lens, but I always have to sharpen everything in Photoshop..."

  2. #82

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    Re: Rapid View Portrait (RVP) Pictorial lens

    Your RV was made for 8x5" - see post #87.
    The flange size is exactly 2" a very common UK size.

  3. #83

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    Re: Rapid View Portrait (RVP) Pictorial lens

    Quote Originally Posted by goamules View Post
    perhaps this one:
    Thanks to new posts in this old thread, I've discovered that image...

    Beyond footprint of the lens, it is impressive how photographer managed light...

  4. #84

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    Re: Rapid View Portrait (RVP) Pictorial lens

    I should get mine out and shoot some soft focus this winter.

  5. #85

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    Re: Rapid View Portrait (RVP) Pictorial lens

    Absolutely and post your new photos here... I will do the same.


    Quote Originally Posted by goamules View Post
    I should get mine out and shoot some soft focus this winter.

  6. #86

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    Jul 2018
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    Re: Rapid View Portrait (RVP) Pictorial lens

    Thanks Mark, good tips!


    Quote Originally Posted by Mark Sawyer View Post
    Congratulations! As there's nothing behind the mounting threads to grab onto on these, you need a flange or an iris mount. You could try making a tight-tolerance lensboard hole that you can thread it into, but I'd also tie a good cord around it and secure that to the lensboard, just-in-case.

    The Cooke mounting rings were a standard (for them) 13 tpi, were usually engraved TTH, and came in quarter-inch-diameter increments, so you might look around a little before having one made...

  7. #87

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    Jul 2018
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    Re: Rapid View Portrait (RVP) Pictorial lens

    Thanks Steven, that is very helpful. I will start my searches.

    Anyone have ideas on best places to try and find old mounting flanges like this?


    Quote Originally Posted by Steven Tribe View Post
    Your RV was made for 8x5" - see post #87.
    The flange size is exactly 2" a very common UK size.

  8. #88

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    Re: Rapid View Portrait (RVP) Pictorial lens

    13 TPI seems awfully coarse for a 2" dia lens thread area. They surely must have tightened that up for the smaller lenses? Measure number of threads and the area measured and do a calc to get a close estimate of threads per inch please. Or if you know someone with a good tap and die set there's usually a tpi gauge tool included.

  9. #89
    Mark Sawyer's Avatar
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    Re: Rapid View Portrait (RVP) Pictorial lens

    13 threads per inch is 13 threads per inch, regardless of the diameter. Cookes used a course thread that threaded on with three turns, every lens, every size! They also chamfered the start of the threads. I doubt you'd ever find a Cooke cross-threaded in it's flange. Even the most modern lf lenses seems a bit less "civilized" by comparison...
    Attached Thumbnails Attached Thumbnails ck.jpg  
    "I love my Verito lens, but I always have to sharpen everything in Photoshop..."

  10. #90
    Between here and there
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    Re: Rapid View Portrait (RVP) Pictorial lens

    " ... the ungrudging care ..." - what a way to describe it - they did indeed think of the small, but important details!
    "Be still and allow the mud to settle."

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