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  1. #21
    Reinhold's Avatar
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    To keep from getting getting sidetracked, I opened a new thread on mounting packard shutters on the front of a lens here...

    http://www.apug.org/forums/forum44/8...t-mounted.html

    Back on topic...

    Here's an example of using a front objective from some whopper binoculars.
    It's about 350 mm focal length achromat, about 80mm diameter.
    In this case I used the barrel from the binoculars, no need to make a mount.
    Aperture rings are held on with a Haagen-Dazs ice cream carton rim.

    It puts an image on the ground glass quite like Jim's photo of the toy car.
    Nice, but I prefer the character of the meniscus for portraiture.

    Reinhold

    www.classicBWphoto.com
    Attached Thumbnails Attached Thumbnails 355 x 80 ACR1.jpg   355x80 Acr2.jpg  

  2. #22
    Toffle's Avatar
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    Quote Originally Posted by Reinhold View Post
    Aperture rings are held on with a Haagen-Dazs ice cream carton rim.
    ...

    Reinhold

    www.classicBWphoto.com
    This is exactly what I'm talking about! Pure innovation. No need to stalk the plumbing aisles at the hardware store when we can reuse/recycle from our own trash.

    Every once in awhile I hear mention of Alexander McKay, who ground his own lenses out of the bottoms of whiskey bottles. (of course, in my case it would mean changing brands, but I might be willing to make a sacrifice... )
    Tom, on Point Pelee, Canada

    Ansel Adams had the Zone System... I'm working on the points system. First I points it here, and then I points it there...

    http://tom-overton-images.weebly.com


  3. #23
    Reinhold's Avatar
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    How about mounting a meniscus lens on an RB-67 ???

    Glad you asked...

    I machined a plastic replica of the bayonet mount for an RB...
    Attached it to a PVC barrel containing a 133mm x 63 mm meniscus lens...
    Added a 68mm filter ring to the barrel...

    Presto; a soft focus lens for my RB.

    Shot at f11, FP4, 1/2 second (guesstimate), straight negative scan.

    Reinhold

    www.classicBWphoto.com
    Attached Thumbnails Attached Thumbnails TTSL 005.jpg   Soft RB-1.jpg   Soft RB 2.jpg   Sofr RB 3.jpg  

  4. #24
    Jim Noel's Avatar
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    Reinhold,

    This is great. If more people would experiment in this and other areas instead of asking how others do everything from buying a lens to printing, they would be more knowledgeable and possibly advance the art and science of photography. Besides that, they could save a lot of money and buy more film to keep the manufacturers in the business.

    Jim
    [FONT=Comic Sans MS]Films NOT Dead - Just getting fixed![/FONT]

  5. #25
    Toffle's Avatar
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    Quote Originally Posted by Reinhold View Post
    How about mounting a meniscus lens on an RB-67 ???

    Glad you asked...

    I machined a plastic replica of the bayonet mount for an RB...
    Attached it to a PVC barrel containing a 133mm x 63 mm meniscus lens...
    Added a 68mm filter ring to the barrel...

    Presto; a soft focus lens for my RB.

    Shot at f11, FP4, 1/2 second (guesstimate), straight negative scan.

    Reinhold

    www.classicBWphoto.com
    I dunno... a little too sharp, don't you think? You're making it hard for the rest of us duffers to compete.

    (Ok, ok... I admit it's nice. )
    Tom, on Point Pelee, Canada

    Ansel Adams had the Zone System... I'm working on the points system. First I points it here, and then I points it there...

    http://tom-overton-images.weebly.com


  6. #26
    Jeff Bannow's Avatar
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    Quote Originally Posted by Reinhold View Post
    How about mounting a meniscus lens on an RB-67 ???

    Glad you asked...

    I machined a plastic replica of the bayonet mount for an RB...
    Attached it to a PVC barrel containing a 133mm x 63 mm meniscus lens...
    Added a 68mm filter ring to the barrel...

    Presto; a soft focus lens for my RB.

    Shot at f11, FP4, 1/2 second (guesstimate), straight negative scan.

    Reinhold

    www.classicBWphoto.com
    Nice! I wish I had something like that for my Hasselblad ....
    - Jeff (& sometimes Eva, too) - http://www.jeffbannow.com

  7. #27
    Reinhold's Avatar
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    Fitting a meniscus lens onto a SLR such as a Hassleblad, Mamiya, Bronica, or Pentax is not as easy as putting one on a flat lensboard.

    Without machining a special adapter, some ideas come to mind...

    ... Adapt a body cap.
    This is probably the quickest solution if the body cap has bayonet lugs.
    A slip-on style body cap may need some way to better secure it to the camera.
    The lens tube can be screwed, glued, or duct taped to the cap.

    ... Use an extension tube.
    The bayonet end of an extension tube set is an ideal connection.
    It could even be configured for interchangeable lens barrels.
    Machine each lens barrel to fit into the extension tube base unit.
    A light slip fit with an O-ring might be just the ticket...

    ... Cannibalize a junk lens body.
    Depending on design, the bayonet end portion might make a good adapter.
    Break out the hacksaw...

    For our 35mm friends, the ubiquitous "T" Mount would let them fit smaller meniscus lens tubes with minimal fuss...

    No excuses now: Go Forth and fill the earth with soft focus photo's...

    Reinhold

    www.classicBWphoto.com

  8. #28
    Lee L's Avatar
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    This little ebook on CD-ROM might be of interest to those in this thread. It has a huge variety of mounting suggestions for many different camera bodies, shutter ideas, focusing mechanism ideas, sources for lens elements, etc.

    http://www.surplusshed.com/pages/item/m2797.html

    Lee

  9. #29
    nhemann's Avatar
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    I own this e-book and by way of a review I would say that given there is not a lot of information out there regarding how to build your own lenses its a good place to start with but after that it gets tedious with just build summary after build summary - the whole document is close to 1200 pages. There is little to no discussion on how to get the best out of the lens (by stopping down - even minimally) so the pics provided generally exhibit distractingly large amounts of aberration.

    Also, while not specifically a problem with the book, LF lens makers should be aware that large format lenses are not discussed.

    That being said, if you are looking to understand the basics of lenses and how to get one built and onto your camera its a good starting point, but it is certainly not the end all and be all of reference materials.

  10. #30

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    [QUOTE=Reinhold;1142389]Soft Portrait Lens

    This is more than a patch-up collection of paper tube and duct tape.
    The barrel is machined from PVC tubing.
    The lens is seated against a machined stop and is secured with a machined PVC retaining ring.




    Love your homemade lens!

    Is that PVC, Sch 80?

    I see you made a nachined stop and retaining ring.

    I was wondering, does matter how far in the tube you put the lens with the machined stop an the retaining ring to hold the lens in?

    What type of lens would you use for lanscape?

    Thank you for the idea, I'm going to build one

    Delta

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