Site Sponsors
Results 1 to 10 of 10

Thread: Mamiya Auto Bellows

  1. #1
    Workshop Member
    Join Date
    Mar 2009
    Location
    Houston TX USA
    Posts
    273
    Post Thanks / Like

    Mamiya Auto Bellows

    I have been starting to look into macro with a MFDB ...

    There are a few sites out there on the web that show a slew of Rube Goldberg ways to get microscope objectives onto DSLR, and then move them around for focus stacking.

    That seems a bit complicated as a first go, so I'm going to stick with a simple bellows setup and either normal mount or reversed mount lenses.

    Good ole KEH has Mamiya (645 AF) Auto Bellows #NC401 This bellows, and all I can find is that "magnification varies with the lens mounted"

    Any ideas how to compute both the magnification and DOF when using various lenses?

    Thanks for the help.

    Dave

  2. #2
    Super Duper
    Senior Member
    Vivek's Avatar
    Join Date
    Apr 2008
    Location
    Netherlands
    Posts
    13,601
    Post Thanks / Like
    Images
    21

    Re: Mamiya Auto Bellows

    There are many publications available. Among which, I strongly recommend the Kodak publication No. N-12 (long out of print but easily found used, often for a pittance).

    "Close-Up Photography & Photomacrography", Eastman Kodak Comp., 1977, ISBN 0-87985-206-2

  3. #3
    Super Duper
    Senior Member
    Shashin's Avatar
    Join Date
    May 2011
    Location
    Florida, USA
    Posts
    4,499
    Post Thanks / Like
    Images
    141

    Re: Mamiya Auto Bellows

    I would look at a Novoflex Universal bellows and enlarger lenses. Enlarger lenses are really great lenses for macro work as they are optimized not only for small distances and flat fields, but also for resolving power. 80mm and up should have a good image circle for your sensor. If you buy the lenses from eBay rather than from Novoflex, you will get much better prices. You just have to tape off the aperture dial illumination path.

  4. #4
    Super Duper
    Senior Member
    Shashin's Avatar
    Join Date
    May 2011
    Location
    Florida, USA
    Posts
    4,499
    Post Thanks / Like
    Images
    141

    Re: Mamiya Auto Bellows

    Scale of reproduction = focal length / object distance – focal length

  5. #5
    Workshop Member
    Join Date
    May 2008
    Location
    NYC
    Posts
    3,275
    Post Thanks / Like
    Images
    7

    Re: Mamiya Auto Bellows

    If you decide to buy that bellows you could also buy it from a vendor that has done the exact kind of work you're looking to do and can provide expert guidance.

    http://www.captureintegration.com/20...extreme-macro/
    http://www.captureintegration.com/store/lenses/

    A lot of the formulas and technique you're inquiring about are outlined at those links.






    Doug Peterson (e-mail Me)
    __________________

    Head of Technical Services, Capture Integration
    Phase One Partner of the Year
    Leaf, Leica, Cambo, Arca Swiss, Canon, Apple, Profoto, Broncolor, Eizo & More

    National: 877.217.9870 *| *Cell: 740.707.2183
    Newsletter | RSS Feed
    Buy Capture One 6 at 10% off

  6. #6
    Super Duper
    Senior Member
    Vivek's Avatar
    Join Date
    Apr 2008
    Location
    Netherlands
    Posts
    13,601
    Post Thanks / Like
    Images
    21

    Re: Mamiya Auto Bellows

    Because of the nice picture above, I add this.

    Schneider make lenses (see: http://www.schneiderkreuznach.com/in...makro_zube.htm) more suitable than the enlarging lenses.

    If using the plastic enlarging lenses (Schneider or late Nikon ones or Rodenstock ones) you do need to tape up the illumination path as mentioned by Shashin. Otherwise, it will become a very expensive exercise in futility.

  7. #7
    Super Duper
    Senior Member
    Shashin's Avatar
    Join Date
    May 2011
    Location
    Florida, USA
    Posts
    4,499
    Post Thanks / Like
    Images
    141

    Re: Mamiya Auto Bellows

    Quote Originally Posted by Vivek View Post
    Schneider make lenses (see: http://www.schneiderkreuznach.com/in...makro_zube.htm) more suitable than the enlarging lenses.
    ??? But those are enlarger lenses in a different barrel.

  8. #8
    Super Duper
    Senior Member
    Vivek's Avatar
    Join Date
    Apr 2008
    Location
    Netherlands
    Posts
    13,601
    Post Thanks / Like
    Images
    21

    Re: Mamiya Auto Bellows

    Indeed. That is the whole point. If you read the pdf or better if you happen to compare the plastic ones vs the metal barreled ones you will see the advantages.

    To summarize:

    1. Better construction in terms of build.

    2. Symmetric barrel allows one to reverse the mounts easily (no extra adapters needed) as well as allowing the use of hoods (very important for anything serious).

    Schneider used to sell some of these labeled "APO-Makro Componon 60/4" and such. These were already reversed.

  9. #9
    Workshop Member
    Join Date
    May 2008
    Location
    NYC
    Posts
    3,275
    Post Thanks / Like
    Images
    7

    Re: Mamiya Auto Bellows

    Yes. All true. The picture was taken mid-way through my experimentation/learning process. :-)

  10. #10
    Super Duper
    Senior Member
    Shashin's Avatar
    Join Date
    May 2011
    Location
    Florida, USA
    Posts
    4,499
    Post Thanks / Like
    Images
    141

    Re: Mamiya Auto Bellows

    If you would like some expert help, I can think of no better place than this:

    http://www.photomacrography.net/

    It is a great forum and place for information.

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •