Switch to English Language Passer en langue française Omschakelen naar Nederlandse Taal Wechseln Sie zu deutschen Sprache Passa alla lingua italiana
Members: 70,287   Posts: 1,535,332   Online: 864
      
Results 1 to 10 of 10
  1. #1
    JJB
    JJB is offline

    Join Date
    Dec 2007
    Location
    NJ
    Shooter
    Medium Format
    Posts
    67

    ND filters for all panoramic cameras?

    I have seen where one kind of pano camera needed a center weighted nd filter. Do they all?

    Thanks!

  2. #2
    Ian Grant's Avatar
    Join Date
    Aug 2004
    Location
    West Midlands, UK, and Turkey
    Shooter
    Multi Format
    Posts
    16,243
    Images
    148
    It's the lens that needs the filter not the camera, so no they don't all need a centre filter, only those using certain wide angle lenses.

    For example a 6x17 camear with a 90mm or longer doesn't need a centre filter, a shorter lens like a 75mm needs one particularly for colour work, however with B&W you can get away with out one. I usually have to work hand held (no tripods permitted) so can't afford the speed loss of a centre filter on my 75mm and as I only shoot B&W I can dodge the edges of the negatives at the printing stage.

    Ian

  3. #3
    JJB
    JJB is offline

    Join Date
    Dec 2007
    Location
    NJ
    Shooter
    Medium Format
    Posts
    67
    Thanks for the info Ian. I am doing a bit of reseach with the intention to build my own. Yes, I am crazy...

    A 6x17 uses a large format lens, correct?

    Thanks!

  4. #4
    Ian Grant's Avatar
    Join Date
    Aug 2004
    Location
    West Midlands, UK, and Turkey
    Shooter
    Multi Format
    Posts
    16,243
    Images
    148
    Yes a 6x17 need lenses that cover 5x4 with room for movements. So while a 65mm f8 Super Angulon just covers 5x4 it's not quite enough for 6x17, likewise a 90mm f6.8 Angulon won't cover 6x17. Some wider more exotic XL Schneider's will cover but are rather expensive.

    Ian

  5. #5
    JJB
    JJB is offline

    Join Date
    Dec 2007
    Location
    NJ
    Shooter
    Medium Format
    Posts
    67
    Well, a lens for a 4x5 should cover a 6x12 without trouble. I can either go in this direction or look to optics for an 8x10.

  6. #6
    Ian Grant's Avatar
    Join Date
    Aug 2004
    Location
    West Midlands, UK, and Turkey
    Shooter
    Multi Format
    Posts
    16,243
    Images
    148
    Nearly all decent 5x4 lenses will cover 6x17 easily, it's a much more interesting format than 6x12

    It's only the very wide lenses like a 65mm SA that don't cover 6x17, many users go no shorter than a 90mm which will have loads of coverage.

    Ian

  7. #7
    Steve Smith's Avatar
    Join Date
    May 2006
    Location
    Ryde, Isle of Wight
    Shooter
    Medium Format
    Posts
    8,591
    Images
    122
    Quote Originally Posted by JJB View Post
    Thanks for the info Ian. I am doing a bit of reseach with the intention to build my own. Yes, I am crazy...
    Nothing crazy there - see my 6x12 link below..... Actually, yes, it is a bit crazy.

    Quote Originally Posted by Ian Grant View Post
    Nearly all decent 5x4 lenses will cover 6x17 easily, it's a much more interesting format than 6x12
    Now he tells me!

    Quote Originally Posted by Ian Grant View Post
    It's only the very wide lenses like a 65mm SA that don't cover 6x17
    That's o.k. then.


    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.

  8. #8

    Join Date
    May 2009
    Shooter
    Medium Format
    Posts
    165
    If you mounted a polariser onto a fuji g617 on top of the centre filter, would you need to stop down another stop, for example @ f11 losing one or two stops, to f16 or even f22?

  9. #9
    LJH
    LJH is offline

    Join Date
    Nov 2008
    Location
    Melbourne, Australia
    Shooter
    ULarge Format
    Posts
    543
    Quote Originally Posted by pollux View Post
    If you mounted a polariser onto a fuji g617 on top of the centre filter, would you need to stop down another stop, for example @ f11 losing one or two stops, to f16 or even f22?
    1 - 1.5 stops for the CF; 2-2.5 for the Polariser. Total = 4 - 4.5 stops. 100 asa ends up somewhere around 5 asa.

    So you'll also need to get your head around reciprocity failure as well. I shoot Velvia/Provia in colour and Acros in B&W to minimise reciprocity failure. Shot some film today with a Pol and CF in rainforest. Exposures were around 2-4 minutes...

  10. #10

    Join Date
    Mar 2010
    Shooter
    Multi Format
    Posts
    317
    I use ND filters for my pinhole. I converted a 6x9 zeiss folder and removed the bellows and the arms and then used a piece of sheet metal to cover the front of the camera. The field of view is now very wide because of the short focal distance from the pinhole to the film. Because of this, even with low ISO films my exposure time was relatively fast so to slow it down a little I started using ND filters.



 

APUG PARTNERS EQUALLY FUNDING OUR COMMUNITY:



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