Results 1 to 8 of 8

Thread: Filter behind the lens

  1. #1

    Join Date
    Jan 1999
    Posts
    94

    Filter behind the lens

    Other than the hassle, is there any reason why placing a filter behind a lens wo uld result in poorer performance compared to placing the filter in front of the lens? I guess the image circle may be reduced more, but let's ignore image circ le issues for the purposes of this discussion.

    Why don't manufacturers provide threads or an easy way to put on resin filters b ehind lenses? Heliopan makes an adapter that "clamps" on to lenses without thre ads, so filters or resin holders can be attached. Has anyone tried this? I tho ught that this was the main purpose for this adapter, but Bob Salomon tells me o therwise. Actually, Lee also makes a filter holder with two "rubber bands" for attachment.

    Taping resin filters to the back of my lenses seems too dirty for me.

  2. #2

    Join Date
    Jan 1999
    Posts
    94

    Filter behind the lens

    Of course, I don't intend to use grads, polarizers, etc. behind the lens. These go to the front. Only CC filters go to the back.

  3. #3

    Join Date
    Jan 1999
    Posts
    23

    Filter behind the lens

    I have taped filters for many years-I use four peices of tape foled into a circle- works great-

  4. #4

    Join Date
    Mar 1998
    Posts
    1,973

    Filter behind the lens

    This technique works great, especially if you are use gels or resin filters. It reduces flare/reflection problems to near zero. I use phototape or gaffer tape t hat leaves little residue on filter or lens barrel.

  5. #5

    Join Date
    Sep 1998
    Posts
    10,360

    Filter behind the lens

    What I told you was that placing filters behind lenses results in a focus shift of 1/3rd the thickness of the filter.

    Except for some gel holders there are no behind the lens filter holders for this reason and also because any dust, dirt, fingerprints, scratches, uneveness in a filter (glass or acrylic) will materially effect the image.

    The Heliopan adapter was desined to put filters on to the front of lenses without thr

  6. #6

    Join Date
    Mar 1998
    Posts
    1,973

    Filter behind the lens

    Yes Bob, you absolutely right! This why Sinar built a 100mm filter holder into t he rear of both the auto & digital shutters.

  7. #7

    Join Date
    Sep 1998
    Posts
    10,360

    Filter behind the lens

    Yes they did. And Xenophon Beake makes a holder too. For gels.

  8. #8

    Filter behind the lens

    I have a schnider 300 f:5.6 APO and what I have done is this. You use a coken pro size filter holder. For this lens I needed to cut the hole out a little and then I glued it to the metel parts on the rear of the lens with black silastic cement. This way if i choose to remove it it will not be difficult to do so. I then use the lens cover that comes with the cokin holder. I also use A pol. filter on the rear and in order to this i just view through the rear of the lens with the filter on and rotate the filter till the seen looks as I want.

Similar Threads

  1. Replies: 3
    Last Post: 14-Apr-2006, 12:19
  2. Behind the lens filter placement
    By Bill_1856 in forum Lenses & Lens Accessories
    Replies: 7
    Last Post: 26-May-2002, 21:22
  3. filter attachment to LF lens
    By Michael Krause in forum Gear
    Replies: 4
    Last Post: 12-Sep-2001, 10:47
  4. Convertable Lens and Filter
    By Chris Partti in forum Lenses & Lens Accessories
    Replies: 4
    Last Post: 20-Mar-2001, 10:04
  5. Lens/filter size
    By J.L. Frost in forum Lenses & Lens Accessories
    Replies: 3
    Last Post: 19-Jun-2000, 04:59

Bookmarks

Posting Permissions

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