Switch to English Language Passer en langue française Omschakelen naar Nederlandse Taal Wechseln Sie zu deutschen Sprache Passa alla lingua italiana
Members: 71,840   Posts: 1,582,541   Online: 1026
      
Results 1 to 5 of 5

Thread: Didy Filter...

  1. #1
    ChristopherCoy's Avatar
    Join Date
    Aug 2011
    Location
    The Armpit of Texas
    Shooter
    Multi Format
    Posts
    1,298
    Images
    28

    Didy Filter...

    I have a lot if friends who work with hot glass, mostly torch work.

    They use didymium glasses so that they can "see" the flame. It's purple glass that cuts out the yellow/orange glare.

    I know I can get didymium plates that could hold in front of my camera, but is there an actual didy filter that I can put in my hassleblad? How would such a filter reproduce on a B&W negative?

    I'm wanting up photograph a friend while he works pretty soon.

  2. #2

    Join Date
    Jun 2003
    Location
    Portland, Oregon
    Posts
    1,344
    Tiffen color enhancing filters are didymium glass. http://www.tiffen.com/displayproduct...emnum=62WIDEF1

  3. #3

    Join Date
    Jun 2003
    Shooter
    Large Format
    Posts
    16,878
    Images
    23
    Quote Originally Posted by ChristopherCoy View Post
    I have a lot if friends who work with hot glass, mostly torch work.

    They use didymium glasses so that they can "see" the flame. It's purple glass that cuts out the yellow/orange glare.

    I know I can get didymium plates that could hold in front of my camera, but is there an actual didy filter that I can put in my hassleblad? How would such a filter reproduce on a B&W negative?

    I'm wanting up photograph a friend while he works pretty soon.


    hey christopher

    is there a way to borrow their glasses or a spare pair
    and just hold it infront of your camera ?

    it might be easier ( and less expensive ! ) then buying
    photo grade glass that might be a pspecial order ...

    have fuN !
    john

  4. #4
    polyglot's Avatar
    Join Date
    Jun 2009
    Location
    South Australia
    Shooter
    Medium Format
    Posts
    3,334
    Images
    12
    Didymium filters are a not-uncommon off-the-shelf item sold by a bunch of manufacturers including Hoya. They are a notch filter, i.e. they filter out a very narrow slice of spectrum; the ones used for glass blowing filter out the sodium emission line from high temperature glass.

    You can have the notch at different wavelengths, which means for photographic use you can buy red-enhancing, green-enhancing and blue-enhancing filters. B&H sells a B+W Redhancer, for the Hoyas I think you need to get on eBay.

    And this dpreview thread contains probably all the info you need for photographing glass blowing.

  5. #5

    Join Date
    Mar 2004
    Location
    San Francisco Bay Area
    Shooter
    Multi Format
    Posts
    858
    Images
    42
    Didymium filters used to be popular for filtering out the light from sodium (yellow) street lighting when doing astronomical photography. Not a perfect solution since those lights also used cadmium (a sort of dull red colour) as a starter as they warmed up.
    I feel, therefore I photograph.



 

APUG PARTNERS EQUALLY FUNDING OUR COMMUNITY:



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