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Thread: LED enlarger head creation -- just a thought

  1. #11
    Tin Can's Avatar
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    Re: LED enlarger head creation -- just a thought

    I gave away a Omega Super Chromega F Dichroic II 8x10 Enlarger Head as I consider it a very flawed design.

    One is FS right now, just like it...

    LED is ready for Prime time everywhere

    Quote Originally Posted by ic-racer View Post
    Ebay usually has many Chromega D heads available and these are designed to replace the condensers of the D2. So the solution has already been thought out without requiring hard-to find-LED and PWM LED power supplies, etc.
    sin eater

  2. #12

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    Re: LED enlarger head creation -- just a thought

    Well, the easiest conversion for the everyman (or woman) , (for B/W) is using the condenser is simply changing out the bulb for a bright (slightly)warm white LED + diffuser at the same height of the old bulb... (This also takes a slight hardness off the condenser look due to the diffuser above...)There will be a (slight?)shift in the MG response, but should work with filters...

    Color is a whole other animal...

    Steve K

  3. #13
    Tin Can's Avatar
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    Re: LED enlarger head creation -- just a thought

    I have an old AGFA CB7 Color Head that was used on condenser with a 1 light source in storage

    Non Dichroic

    Pics of design tomorrow
    sin eater

  4. #14

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    Re: LED enlarger head creation -- just a thought

    I recall reading a few threads here about using a high-quality, LED light-box as a light-source for 5x7 and 8x10 (possibly even larger?). That simply needed a foamcore adapter box and one layer of diffusion, then it worked rather well. Isn't that a simpler option if there are no funds/time/ability to produce a custom LED head? It is a nice hobby to develop such engineering triumphs, but I'd rather be printing.

  5. #15
    Tin Can's Avatar
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    Re: LED enlarger head creation -- just a thought

    Yes, I posted results in DIY years ago

    But few saw it in DIY

    some here really discourage anything experimental

    Quote Originally Posted by MartinP View Post
    I recall reading a few threads here about using a high-quality, LED light-box as a light-source for 5x7 and 8x10 (possibly even larger?). That simply needed a foamcore adapter box and one layer of diffusion, then it worked rather well. Isn't that a simpler option if there are no funds/time/ability to produce a custom LED head? It is a nice hobby to develop such engineering triumphs, but I'd rather be printing.
    sin eater

  6. #16
    Tin Can's Avatar
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    Re: LED enlarger head creation -- just a thought

    Here is a very old CB7 AGFA COLOR Head with matching condenser

    The lamp is unknown, I never took it out, it does project as point lamp through a 2X2" glass diffuser and mounts only on the matching condenser head

    Color Temp as measured today is 3300K as shown on my backdrop. I replaced a wheezing OE fan with a computer fan. It runs on 120 VAC 316 watts today

    I see no reason an LED lamp could not be installed by almost anybody

    Notice it has a filter drawer that looks unused

    This is my spare, not for sale

    AGFA HEAD by TIN CAN COLLEGE, on Flickr

    AGFA Diffuser by TIN CAN COLLEGE, on Flickr

    AGFA Lamp by TIN CAN COLLEGE, on Flickr

    AGFA Condensor by TIN CAN COLLEGE, on Flickr
    sin eater

  7. #17
    Tin Can's Avatar
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    Re: LED enlarger head creation -- just a thought

    AGFA 3300K by TIN CAN COLLEGE, on Flickr
    sin eater

  8. #18
    Drew Wiley
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    Re: LED enlarger head creation -- just a thought

    That colorhead looks like a Stone Age relic. Fascinating. But one merely needs to rest a small, even, bright LED panel above the neg carrier to make modest sized b&w prints. No need to rewire anything. Actual color printing is a different story.

  9. #19
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    Re: LED enlarger head creation -- just a thought

    of course Wiley, I will never enlarge colour prints

    what will I do next...


    Quote Originally Posted by Drew Wiley View Post
    That colorhead looks like a Stone Age relic. Fascinating. But one merely needs to rest a small, even, bright LED panel above the neg carrier to make modest sized b&w prints. No need to rewire anything. Actual color printing is a different story.
    sin eater

  10. #20

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    Re: LED enlarger head creation -- just a thought

    The Heiland is indeed a wonderful long-term investment, and I am all for high-quality long-term physical investestments, but the term before I am able to afford that expense may be longer.

    DIY is great for those who can, but not all of us are quite so handy. What seems simple and obvious to one... I have put together enough "Oh, this looks pretty simple" items over the past 50 years to know how few of them ever succeeded. One is the anti-flare collar I made for my Pentax V spot meter out of a black plastic report cover back and some flocking paper. I'm proud of it, but I have yet to need it. I did make a light dimmer for a video light years ago. It does work, but it's a gangly, awkward thing that definitely does not look like the one in the photos, and I got a nice manufactured one for about $25. So, making something as important as an enlarger light source? I think not.

    Though controlled VC contrast light is great, I'd be happy with an LED source that required my continuing to use under-lens VC filters.
    Philip U.

    Sine scientia ars nihil est. (Without science/knowledge, art is nothing.)
    https://www.flickr.com/photos/156933346@N07/

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