Switch to English Language Passer en langue française Omschakelen naar Nederlandse Taal Wechseln Sie zu deutschen Sprache Passa alla lingua italiana
Members: 71,517   Posts: 1,572,154   Online: 980
      
Page 1 of 2 12 LastLast
Results 1 to 10 of 13
  1. #1

    Join Date
    Jan 2007
    Shooter
    Medium Format
    Posts
    310

    Shooting panoramic with 35 mm films in Penta 67-ii

    I have a lot of 100 ft rolls of negative and slide films in my freezer. I am planning to consume them (but not eating them) faster by shooting them through my Pentax 67-ii. Has anyone done this before without using an adapter? There used be an adapter sold on eBay but no longer seen now. The price was a bit hard to reach for me anyway.

    I found that 35 mm film cassette can be easily loaded in the Pentax 67-ii's supply and take up cavities where normally 120 or 220 films are loaded. I do need to fabricate something to put the cassettes in the middle of the cavities so that the film will travel through the center of the film plane. I also need to fabricate a linkage so that when I crank the film advance lever it cranks the cassette in the take up cavity. This is not hard to fabricate.

    I also have some 46mm 100 ft rolls in the freezer too. I will try to consume them with my Pentax 67-ii as well. Have planned this for more than a year. Just have not got it started.

    Again has anyone done it? Will the resolution of the panoramic shots be reasonable still? I plan to use my 55 mm wide angle lens to make the shots to cover really a wide angle. Any suggestions welcome. Thanks.

  2. #2
    Steve Smith's Avatar
    Join Date
    May 2006
    Location
    Ryde, Isle of Wight
    Shooter
    Medium Format
    Posts
    8,661
    Images
    122
    There's only one way to find out if it works.... try it!

    I would cut up a 120 spool and modify it so it fits in the ends of the 35mm cassette and just wind onto another 120 spool. The film will have to be removed in darkness but that's not a big deal if you are going to process it yourself.


    Steve.
    "People who say things won't work are a dime a dozen. People who figure out how to make things work are worth a fortune" - Dave Rat.

  3. #3

    Join Date
    Jan 2007
    Shooter
    Medium Format
    Posts
    310
    Thanks, Steve. Your replay is almost instant. Amazing.

    I thought of doing what you suggested. The only drawback is that the finished roll needs to be removed in a changing bag. If I use a reloadable 35 mm cassette I can load and unload in daylight. The cassettes fits exactly perfectly in the Pentax 67-ii. Penatx must have designed it this way. For 46 mm films I have modified some 120 spools that will be perfect for the 46 mm films. I will cut the film of the length of 220 films and use the paper leaders from used 220 films. The leader paper needs to be trimmed down to the width of 46 mm. I should be able to load and unload the custom 46 mm films in daylight too.

    I will process the films myself with a Jobo ATL processor.

  4. #4
    Steve Smith's Avatar
    Join Date
    May 2006
    Location
    Ryde, Isle of Wight
    Shooter
    Medium Format
    Posts
    8,661
    Images
    122
    Could you run the film both from and into a 35mm cassette?


    Steve.
    "People who say things won't work are a dime a dozen. People who figure out how to make things work are worth a fortune" - Dave Rat.

  5. #5
    MattKing's Avatar
    Join Date
    Apr 2005
    Location
    Delta, British Columbia, Canada
    Shooter
    Multi Format
    Posts
    12,796
    Images
    60
    I bought a bunch of used RB67 backs here on APUG, and they included one with a home-made spools adapter to permit use of 35mm film for just this purpose. The advantage of course with removable backs is that when you get to the end of the film, you can put the dark slide in and remove the back, for later opening in the darkroom.

    I still haven't done the experiments with the back that I would like to.
    Matt

    “Photography is a complex and fluid medium, and its many factors are not applied in simple sequence. Rather, the process may be likened to the art of the juggler in keeping many balls in the air at one time!”

    Ansel Adams, from the introduction to The Negative - The New Ansel Adams Photography Series / Book 2

  6. #6
    SMBooth's Avatar
    Join Date
    Jun 2008
    Location
    Melbourne, North/West
    Shooter
    Multi Format
    Posts
    1,015
    Images
    7
    On Ebay there are conversion kits to do this. Includes mask and some do-dads to hold the cassette.
    Last edited by SMBooth; 06-03-2011 at 08:21 PM. Click to view previous post history. Reason: spelling

  7. #7

    Join Date
    Jan 2007
    Shooter
    Medium Format
    Posts
    310
    Quote Originally Posted by Steve Smith View Post
    Could you run the film both from and into a 35mm cassette?
    Yes, Steve. The cassettes I will be using are reloadable cassettes. Will need a 2" piece of scotch tape to tape the paper leader on the core, reassemble the cassete then load it into the take up cavity. I will just need to advance the paper leader to where the mark on it lines up with the camera then close the back and keep advancing to the first frame. This should be just like a roll of 220 film.

    The cassette will not be large enough for a 220 film's length of 35 mm film because of the leader and the tail of the roll paper. I did some calculation. It should be enough for 3/4th of a 220 film's length. That's about the length of a 35 mm 24 frame film. That will give me about 15 to 16 shots of the size of 24 mm x 68 mm panoramic shots.

    With a Watson 35 mm bulk film loader I can easily load a 24 frame length of my 35 mm film with trimmed paper leader and tail on both end of the film. There seems to be no other issues for me to overcome.

  8. #8

    Join Date
    Jan 2007
    Shooter
    Medium Format
    Posts
    310
    Putting a mask behind the curtain shutter is something I don't like. It changes the distance between the lens and the film. I would need to add the same thickness to the focusing screen beneath the prism. If the masks are too thick it may be a problem. If they are very thin then they may not be rigid enough and could be risky for the shutter. I will use no masks. I will need to draw two horizontal lines on the back of the focusing screen. That's easy to do. I have tried to put a piece of the 35 mm film in with the back closed. Then I fired the shutter set to B. With the lens removed I could see that the film was flat enough. I don't think film flatness will be an issue. I will shoot with small aperture to get deep DOF anyway. I don't need masks.

    Well, I really have a lot of 100 ft bulk films. Quite some Potra NC and Portra VC. Some are Vericolor III, Agfa and Konica. I also have some Velvia 50 and Provia 100. I better start to consume them. I had them for school portrait jobs with Camerz cameras. I guess I will produce tons of panoramic shots instead of portraits for kids.

  9. #9
    Jim Jones's Avatar
    Join Date
    Jan 2006
    Location
    Rural NW Missouri
    Shooter
    4x5 Format
    Posts
    1,845
    Unless one can maintain film flatness and position within a very few thousands of an inch, sharpness will suffer. This precision may be difficult to maintain with improvised 35mm film adaptors. Considering the time involved in making, testing, and perfecting the conversion, it may be more practical to shoot on the film for which the camera back is designed, and crop the image.

  10. #10
    resummerfield's Avatar
    Join Date
    Jan 2005
    Location
    Alaska
    Shooter
    Large Format
    Posts
    1,293
    Quote Originally Posted by Jim Jones View Post
    Unless one can maintain film flatness and position within a very few thousands of an inch, sharpness will suffer. This precision may be difficult to maintain with improvised 35mm film adaptors. Considering the time involved in making, testing, and perfecting the conversion, it may be more practical to shoot on the film for which the camera back is designed, and crop the image.
    I agree with Jim on this. I fear the 35mm film in the middle of the opening will curl on the sides unless it is properly supported.
    —Eric

Page 1 of 2 12 LastLast


 

APUG PARTNERS EQUALLY FUNDING OUR COMMUNITY:



Contact Us  |  Support Us!  |  Advertise  |  Site Terms  |  Archive  —   Search  |  Mobile Device Access  |  RSS  |  Facebook  |  Linkedin