Enlarger Lamps

Discussion in 'The Darkroom' started by 70to210mmf4, Sep 6, 2019.

  1. IanG

    IanG No longer a newbie, moving up!

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    According to Durst themselves the RS/35 uses a 60 watt clear household bulb. That will vary in voltage depending on the country and Australia like the UK is 230/240v 50Hz. Tfitting may differ in some countries. Other Duurst enlargers are listed as taking Opal enlarger lamps that indicated the RS/35 has a built in diffuser.

    Just to clear up the filter size is quite different to the format, the RS/35 was designed for sub-miniature to 35mm negatives so as well as 35mm and Instamatic negatives masks there were also masks for various 8mm and 16mm films. The was also a copy camera attachment.

    It wasn't uncommon for older enlargers to use clear bulbs, I have a very early Gnome enlarger that uses a 12v car head light bulb and a transformer, and had a glass diffuser (lost/broken) which I'll replace soon.

    Ian


     
  2. IanG

    IanG No longer a newbie, moving up!

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    upload_2019-9-8_18-13-51.png

    Ian
     
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  3. ac12

    ac12 Been spending a lot of time on here!

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    Thanks Ian,
    A standard clear bulb is sooo much easier to find than a opal/frosted photo bulb.
     
  4. 70to210mmf4

    70to210mmf4 TPF Noob!

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    That's exactly the information I needed; thank you! Where on earth did you find that?
     
  5. 70to210mmf4

    70to210mmf4 TPF Noob!

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    Thanks; that is very comforting to know that I can pick bulbs with different brightness to suit my situation. If a 75 or 60 watt bulb is too bright I will try a 40 watt one. Of course, I may just have a problem with my darkroom or I did something wrong to the paper. I forgot about ND filters; I didn't know you can get them that tiny, that they will fit on an enlarger lens.
     
  6. ac12

    ac12 Been spending a lot of time on here!

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    Hoya has them down to 37mm
    HOYA | Filters
    And you can also use step up rings to put a larger diameter filter on a smaller lens.

    Don't forget, you have the color filter drawer, that you can put ND gel filters into.
    Just watch the heat, gel filters don't like to get too hot.
     
  7. compur

    compur Been spending a lot of time on here!

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    If you're going to use filters, diffusers and whatnot, I'd suggest keeping them above the negative. Otherwise they can degrade the image. I wouldn't attach any filters onto the front (paper side) of the lens.
     
  8. IanG

    IanG No longer a newbie, moving up!

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    So you don't place filters onto the front of a camera lens :D

    The RS/35 has a filter drawer above the negative carrier, But filter drawers are quite close to the negative so filters need to be in good condition. I've used Ilford's below the lensMG filters and there's NO degradation in image quality and I've never heard of any cases either they've sold a huge number of sets as did Kodak and Dupont.

    You have to remember that Wratten, Tiffen and many others have made gelatin filters for use in front of lenses for decades, over a 100 years in the case of Wratten starting before the company was bought at GEK Mees insistence by Eastman Kodak.

    The reality is the Ilford below the lens MG filter set is actually more robust than the filter drawer set because they are held in plastic holder.

    Ian
     
    Last edited: Sep 14, 2019
  9. ac12

    ac12 Been spending a lot of time on here!

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    If it is optical glass filter, I would not have an issue putting it on an enlarger lens.
     
  10. IanG

    IanG No longer a newbie, moving up!

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    He's talking about optical gelatin filters, they have a very long history of use, I have some graduated ones from about 1910, they were sold as plain gelatin filters or sandwiched between glass.

    Ian
     
  11. compur

    compur Been spending a lot of time on here!

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    Only when I have to.
     
    Last edited: Sep 14, 2019
  12. compur

    compur Been spending a lot of time on here!

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    I would.
     

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