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  1. #1

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    Adding An Extra Magenta Filter

    Hello to all,
    Does anyone have comments or suggestions about adding an extra magenta dichronic filter to a Super Chromega housing?
    I can't get really high contrast with the current magenta alone and would like to replace the cyan filter with a magenta filter. I'm assuming that the values will add when both filters are used. Using a dial is easier than inserting filters under the lens. I know that I'll lose some flexibility without the cyan but this seemed to be the best solution.
    Thanks

  2. #2

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    If your head is a D or DII you can fit a 6x6 filter in the bottom of the 4x5 mixing box. The lips under the diffuser are spaced perfectly. You can slide the filter in with the mixing box in place, and pull it out partway to remove. Not as elegant as dialing but cheap to try.

  3. #3
    ann
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    for printing black and white you don't use cyan, so it shouldn't be a big loss. Color , a different story,
    http://www.aclancyphotography.com

  4. #4
    Bob Carnie's Avatar
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    no the values will not add up.

    If you get 200 Magenta with your enlarger one filter is it , adding extra filter will not get you 400 magenta and extra contrast.
    You will just increase your exposure time, and quite dramatically as every 30 filter increase in the Magenta will reguire you an extra stop of exposure on your print.
    so I would not even consider this.

    Bob

    Quote Originally Posted by ragnar58 View Post
    Hello to all,
    Does anyone have comments or suggestions about adding an extra magenta dichronic filter to a Super Chromega housing?
    I can't get really high contrast with the current magenta alone and would like to replace the cyan filter with a magenta filter. I'm assuming that the values will add when both filters are used. Using a dial is easier than inserting filters under the lens. I know that I'll lose some flexibility without the cyan but this seemed to be the best solution.
    Thanks

  5. #5

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    So is 200 magenta equal to a grade 5 MG filter or....? I have never really compared them on my 45S head and seem to get plenty of contrast from the color head, but now I am curious...

  6. #6
    MattKing's Avatar
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    Check to see if the magenta dichroic filter needs cleaning.

    Also check that the cyan filter isn't stuck in the light path.
    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

  7. #7
    Bob Carnie's Avatar
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    Its the most contrast a diffusion enlarger can deliver without purchasing specific filters which is beyond the $$$scope of most darkroom workers.
    I consider it around a 4 1/2 to 5 for my workflow and do get a great DMax.

    Quote Originally Posted by PKM-25 View Post
    So is 200 magenta equal to a grade 5 MG filter or....? I have never really compared them on my 45S head and seem to get plenty of contrast from the color head, but now I am curious...

  8. #8
    Bob Carnie's Avatar
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    Very good point.

    Quote Originally Posted by MattKing View Post
    Check to see if the magenta dichroic filter needs cleaning.

    Also check that the cyan filter isn't stuck in the light path.

  9. #9

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    The fact remains that you cannot get any higher grade than the "hard" emulsion layer is capable of delivering. So past this point no increase in magenta filtration will have any effect other than making exposure times longer.
    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

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    ... also, adding another filter of the same exact color will not gain you anything. The strongest filter (assuming one is stronger than the other) will prevail and the other will do exactly nothing, except to increase your exposure time a little (not as much as Bob suggests above though, since you are filtering already filtered light and the transmission will be close to 100% minus the neutral density characteristics of the filter).

    If you need more contrast for a particular negative, try the following:

    Try a different paper (I've heard that Fomabrom Variant 111 is more contrasty than other VC papers)
    Use the MG grade 5 filter (it may be more contrasty than the magenta in your color head by a bit)
    Use a stronger/more contrasty print developer
    Bleach back the whites after printing a bit darker


    If this is a recurrent problem then:

    Develop more to start with
    Check your magenta filter to see if it has faded; replacing it with a new/good used filter may help

    Best,

    Doremus

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