Page 1 of 3 123 LastLast
Results 1 to 10 of 26

Thread: LED enlarger head creation -- just a thought

  1. #1

    Join Date
    Apr 2015
    Location
    Purcellville, VA
    Posts
    576

    LED enlarger head creation -- just a thought

    I much admire the work of those who can design construct such items, as seen in recent postings. It's way out of my realm; I couldn't design a paper bag. However, it occurred to me as I stood before my Omega D2 the other day, that an entire box replacing the existing head might not be necessary. Could a VC light source be made that simply slides down into the round aluminum collar and sits on the diffuser, as the Aristo and Zone VI cold light heads do? It would need some kind of housing, like the cold lights, to hold whatever electronics are required for control and to block upwards light-spill, but wouldn't this simplify construction and lower cost?

    I realize that I'm just talking about one enlarger here, but I bet a poll would show a lot of them in use, and perhaps the idea would apply to other enlarger designs as well.

    From my standpoint, the unit would ideally have the kind of link to the Zone VI compensation enlarging timer that Paul Schrantz designed for Zone VI -- since I have the timer and need that stabilization, especially when the room air-conditioner cycles on and off in summertime. I don't know if that would be a patent issue, or if LEDs need some different kind of stabilizer/voltage regulator.

    As mentioned in either my posting or private message to OP regarding the plans for a new VC LED head he has very generously shared with us, I'd prefer a wired connection to a timer, thought realizing that this would require different connections to various timers. I don't have an iOS device.

    Finally, I use a foot switch to turn the time on and off, something I first read that W. Eugene Smith had rigged up, and which Zone VI included. What a difference in the ease of dodging and burning-in it makes! The Zone VI one uses a simple phone cable (UTP connector? STP?).

    Okay, I'm done. I just keep hoping that someone will invent something that she or he will also build for sale, that is durable and reliable, versatile, perhaps modular/scalable or in several configurations for various popular enlargers, well-featured, and modestly priced, to replace our aging cold lights. I would guess that a Kickstarter campaign, if needed, could be a significant success.
    Philip U.

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

  2. #2

    Join Date
    Jan 2020
    Location
    Hattiesburg, MS.
    Posts
    71

    Re: LED enlarger head creation -- just a thought

    I have never seen an Omega, but looking at my Beseler it seems possible on this model. I would even consider it possible on mine to replace the bayonet socket inside the top cap with an LED array. Tell me, though... do PC filters work with LED's?

  3. #3
    Tin Can's Avatar
    Join Date
    Dec 2011
    Posts
    13,690

    Re: LED enlarger head creation -- just a thought

    Stripping any existing head of internals and replacing with LED is fairly easy DIY

    It is a poor business proposition

    Too many variations wanted, too few sales imaginable

    I broke a 5X7 Aristo Cold Lamp a few months ago, accidents do happen

    It will be gutted and enhanced with LED

    Sooner or later...maybe...

    Don't forget MANY businesses will not survive the current Plague

    We may emerge as a more DIGI world or retreat to new Dark Age
    sin eater

  4. #4

    Join Date
    Mar 2005
    Location
    Newbury, Vermont
    Posts
    945

    Re: LED enlarger head creation -- just a thought

    I would much prefer to emerge into an analog "age of light."

  5. #5

    Join Date
    Feb 1999
    Posts
    738

    Re: LED enlarger head creation -- just a thought

    I had a similar thought that adapting Intrepid Camera’s LED enlarger light source for use on my D2 might work. I would remove my ancient Aristo cold light head and simply place Intrepid’s LED light source on top of the Omega 4x5 neg. carrier. The dimensions look right, and Intrepid also offers a timer with their light. And it’s a VC-compatible light.

  6. #6

    Join Date
    Sep 2007
    Location
    Charlotte, NC
    Posts
    108

    Re: LED enlarger head creation -- just a thought

    You might try finding an Omegalite, like those seen here; http://www.khbphotografix.com/omega/.../Omegalite.htm

    If more modern LEDs will give good results to variable grade papers, then you could strip out the OEM light and install several winds of both dimable cold and warm LEDs, with dim controls for each, so you can fine 'tune the light source, as some have done with cake pans and other tins.

    The advantage I see is low expense in a correctly shaped head that already fits the Omegas.

    My 5x7" carries one of these heads and it is a separate size than the D series enlargers, which explains my having both a D and E on my bench, one for condenser, and the other for the 5x7" Cromeaega colour head I have yet to repair and replace the current 'cold head'.

    OR, you can find a large enough can, paint the inside enlarger white, install Leds, wrapping around the inside cylinder and, Using the base to meet the enlarger, take a stainless steel bowl and paint the inside whit as well, and install outside clamps, the wire flip lock/unlock type to both the cylinder and reflector dome, for easy access when and if, a fresh coat of paint is ever needed. or you replace the cylinder with a new one.

    You will still need to add light-proof vents, as the LED lights do become hot in use, but other than that, you should have a decent head, when properly married to the enlarger.

    I hope this is clearly written and of uses as food for thought.

    IMO, Eli

  7. #7
    Tin Can's Avatar
    Join Date
    Dec 2011
    Posts
    13,690

    Re: LED enlarger head creation -- just a thought

    that would be ideal

    we need to be realistic, right now

    the enemy is at the ramparts our garrison unmanned

    Quote Originally Posted by John Layton View Post
    I would much prefer to emerge into an analog "age of light."
    sin eater

  8. #8

    Join Date
    Apr 2012
    Location
    Boston, MA, USA
    Posts
    1,479

    Re: LED enlarger head creation -- just a thought

    Quote Originally Posted by Tin Can View Post
    Stripping any existing head of internals and replacing with LED is fairly easy DIY

    It is a poor business proposition

    Too many variations wanted, too few sales imaginable

    I broke a 5X7 Aristo Cold Lamp a few months ago, accidents do happen

    It will be gutted and enhanced with LED

    Sooner or later...maybe...

    Don't forget MANY businesses will not survive the current Plague

    We may emerge as a more DIGI world or retreat to new Dark Age
    There is nothing easy about it. It takes special skill, know how, tools, components, and engineering to make a working, seamless LED conversion.

    Heiland produces ready made, plug and play LED cold light sources for ANY and all enlargers, lead time is just a few days:
    https://www.catlabs.info/product/hei...d-light-source

    They are have been doing this years, and are a good, sustainable business.

  9. #9
    Tin Can's Avatar
    Join Date
    Dec 2011
    Posts
    13,690

    Re: LED enlarger head creation -- just a thought

    Yes they are and you are a reseller

    Most here want far cheaper

    I have considered buying from Heiland



    Quote Originally Posted by koh303 View Post
    Heiland produces ready made, plug and play LED cold light sources for ANY and all enlargers, lead time is just a few days:
    https://www.catlabs.info/product/hei...d-light-source

    They are have been doing this years, and are a good, sustainable business.
    sin eater

  10. #10
    ic-racer's Avatar
    Join Date
    Feb 2007
    Posts
    5,523

    Re: LED enlarger head creation -- just a thought

    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.

Similar Threads

  1. Tr-Color Neg creation
    By David Nash in forum Darkroom: Film, Processing & Printing
    Replies: 19
    Last Post: 24-Feb-2005, 15:20

Tags for this Thread

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •