Poorman's split filtering?

Discussion in 'Enlarging' started by Jorge Oliveira, Jul 6, 2003.

  1. Jorge Oliveira

    Jorge Oliveira Member

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    After reading the previous thread on split filtering, I would really like to try it.
    However, my Opemus III enalrger demands that I slide out the neg carrier to be able to change filters (I use an Ilford set), and I will loose registration between the two exposures.

    I understand that it can be done by holding the filters between lens and paper, but my feeling is that this will degrade the print quality (If one will place a partially diffuse/reflecting surface in the lightpath, what for high quality lenses?).

    Any other suggestion?

    Thanks,

    Jorge O
     
  2. Lemastre

    Lemastre Member

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  3. Flotsam

    Flotsam Member

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    Does that enlarger have a built-in focusing device?
    Just curious.
     
  4. Jorge Oliveira

    Jorge Oliveira Member

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    - The Opemus has a focusing slit, but I do not use it (same as with my stolen Durst 600).
    I prefer the grain focuser (easier to use).

    - The Calumet bookmark is not working for me, but if it refers to the Kodak polymax frame mounted filters (or equivalent), that was the reason for my question.
    One picks the best optical glass filter to place in front of the taking lens and then a fairly cheap plastic/gelatin one to place in front of the enlarging lens?
    Well, then an el cheapo enlerger lens would be OK, why a top Nikkor, Schneider, Rodagon?
     
  5. Ole

    Ole Moderator Staff Member Moderator

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    I use split-grade printing with my Durst 138S - simply because I have condensors instead of a power supply for my CLS 201.
    What I use is actually yellow and magenta gel filters from Cokin - not exactly top notch... But I haven't seen any degradation of the image yet!
     
  6. Robert

    Robert Member

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    I always thought that gel filters are actually better then glass filters in terms of optical quality. Kodak 3"x3" filters aren't exactly cheap either. They seem cheaper then the high end glass filters but how long will one last? Glass filters seem to last almost forever.
     
  7. lee

    lee Member

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    I used brand X blue and green gels for several years under the lens of my 5x7 Elwood and I never saw any degrading of the image. I finally bought a used Aristo 4500 VCL from Midwest Camera Exchange. Now I don't have to worry with filters
     
  8. Jorge Oliveira

    Jorge Oliveira Member

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    Thanks, guys

    I will give the Ilford filters a try under the lenses.

    Jorge O
     
  9. cr frank

    cr frank Member

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    i'm not familiar with your enlarger but heres what works for me. i have an Omega D2 and use split filter printing a lot....first i insert the neg. carrier , then i place two 3" c'clamps at opposite corners of the neg. carrier securring the neg. at this point you can raise and (carefully) lower the head sliding filters inbetween as needed. i use an Aristo cold light and have removed the frosted diffusion..this i tape to the top of the neg. carrier..then the cc filter on top of that. ya have to be a bit carefull but it works great and is certainly a "poor man's " rig..
     
  10. Jorge Oliveira

    Jorge Oliveira Member

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    Thanks, Frank

    I will take a good look at the Opemus and see what can be done.

    Maybe I can place the filters between lamp and condenser? That would be easy, but then there is lamp's heath.

    Jorge O
     
  11. Robert

    Robert Member

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    On my Omega enlarger the the filter drawer is between the condensors and the lamp.
     
  12. marcello.brussard

    marcello.brussard Member

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    Even my old Krokus has the filter drawer beetween lamp and condenser. Heath does not seems to be a issue, at least with the Ilford filters I use and a small power lamp (75 w).

    Ciao,
    Marcello
     
  13. cr frank

    cr frank Member

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    On my Omega enlarger the the filter drawer is between the condensors and the lamp.

    this is proably the D2 V. which makes using cc filters easy. the cold light i use places the lamp directily on top of the neg. making filter placement a problem.
    i dont think heat is an issue as long as the exposures are not too long and there is some air between the lamp and filter.