Switch to English Language Passer en langue française Omschakelen naar Nederlandse Taal Wechseln Sie zu deutschen Sprache Passa alla lingua italiana
Members: 71,933   Posts: 1,585,529   Online: 838
      
Page 1 of 3 123 LastLast
Results 1 to 10 of 23
  1. #1
    bvy
    bvy is offline

    Join Date
    Jul 2009
    Location
    Pittsburgh
    Shooter
    Multi Format
    Posts
    998
    Images
    41

    Dichroic Red Safety Setting

    My Omega C700 enlarger has a color head but the red safety filter is long gone. I wonder, is there a dichroic setting that would be safe for orthochromaitc papers? Sometimes I work without an easel, and it would be a good aid for aligning the image on the paper. Thanks.

  2. #2
    Rick A's Avatar
    Join Date
    Mar 2009
    Location
    north central Pa
    Shooter
    Multi Format
    Posts
    6,250
    Images
    34
    Use a red filter under the lens. Either find a C-700 filteror hand hold a red camera filter.
    Rick A
    Argentum aevum

  3. #3
    AgX
    AgX is offline

    Join Date
    Apr 2007
    Location
    Germany
    Shooter
    Multi Format
    Posts
    9,098
    The Maximum red filtration you'd get from a colour head is by combing the Magenta and Yellow filter.

  4. #4
    David Brown's Avatar
    Join Date
    Feb 2004
    Location
    near Dallas, TX USA
    Shooter
    Medium Format
    Posts
    3,345
    Images
    8

  5. #5
    ic-racer's Avatar
    Join Date
    Feb 2007
    Location
    Midwest USA
    Shooter
    Multi Format
    Posts
    6,393
    Quote Originally Posted by AgX View Post
    The Maximum red filtration you'd get from a colour head is by combing the Magenta and Yellow filter.
    This.

  6. #6

    Join Date
    May 2005
    Location
    Daventry, Northamptonshire, England
    Shooter
    35mm
    Posts
    7,159
    Quote Originally Posted by ic-racer View Post
    This.
    Was the word "this" meant to be a link to something? By itself I cannot work out to what it refers? Any help appreciated

    Thanks

    pentaxuser

  7. #7
    cliveh's Avatar
    Join Date
    Oct 2010
    Shooter
    35mm RF
    Posts
    3,681
    Images
    344
    You need to use a red filter, not a magenta/yellow/cyan combination.

    “The contemplation of things as they are, without error or confusion, without substitution or imposture, is in itself a nobler thing than a whole harvest of invention”

    Francis Bacon

  8. #8
    AgX
    AgX is offline

    Join Date
    Apr 2007
    Location
    Germany
    Shooter
    Multi Format
    Posts
    9,098
    Quote Originally Posted by AgX View Post
    The maximum red filtration you'd get from a colour head is by combining the Magenta and Yellow filter.
    That would be a log. Red-density of about 1.

    (a colour seperation filter goes above Dlog 3)
    Last edited by AgX; 10-08-2013 at 05:01 PM. Click to view previous post history.

  9. #9

    Join Date
    Jul 2010
    Location
    Southern USA
    Shooter
    Multi Format
    Posts
    4,147
    Just buy a sheet of Rubylith and replace the red filter. This stuff is not expensive. People use it to make safelight filters.
    A rock pile ceases to be a rock pile the moment a single man contemplates it, bearing within him the image of a cathedral.

    ~Antoine de Saint-Exupery

  10. #10
    ic-racer's Avatar
    Join Date
    Feb 2007
    Location
    Midwest USA
    Shooter
    Multi Format
    Posts
    6,393
    Quote Originally Posted by pentaxuser View Post
    Was the word "this" meant to be a link to something?
    Alternative to "+++" to emphasize the value of AgX's comments.

Page 1 of 3 123 LastLast


 

APUG PARTNERS EQUALLY FUNDING OUR COMMUNITY:



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