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Thread: focussing an Omega Super Chromega D...Help!

  1. #1

    Join Date
    May 2000
    Posts
    18

    focussing an Omega Super Chromega D...Help!

    This will seem like a stupid question, but I have no manual to consult and no li ve body to ask. I throw myself on your patient mercy. I recently tried using the aforementioned enlarger in a community darkroom and couldn't manage to focus it. The lense is a 135 mm componon, and while I could c ome tantalisingly close to getting the image in sharp focus (a 4x5 neg) I would always ran out of room with the fine focus adjustment. (the twin rails holding t he lens assembly hit thier stops.) There seems to be more bellows extension, which is what I need to get the image in focus, and it looks like the carriage that holds the lens can move up and do wn on a second calibrated track that would allow more extension--I just can't fi gure out how to release it. There is a big black lever (pointing down) behind th e lense board assembly that doesn't seem to do anything. It does look like it mi ght be related to the solution though... What to do? Have I put the negative carrier in wrong or something? Is there a r elease method for the lense board that will give me more extension? I like the c ontact print I managed to make, but the world of enlargement beckons!

    Any help would be greatly appreciated...

  2. #2

    Join Date
    Jan 2001
    Posts
    128

    focussing an Omega Super Chromega D...Help!

    That big black lever you found behind the lens board assembly is the answer to your plight. Pushed to one side, it locks the assembly to the rails. Pushed to the other side, it releases the assembly and allows the lens to be slid up or down the second track you mention. If releasing the big black lever doesn't work, then something is amiss with the enlarger and repair is necessary.

  3. #3

    Join Date
    May 2000
    Posts
    18

    focussing an Omega Super Chromega D...Help!

    Ken: I remember pushing that lever back and forth--it seemed to be swinging too freely to be locking or unlocking anything. I will go back and try again, now that I know what it is supposed to do. The enlarger looks like it is in good shape, and maybe the carriage just needs a little...persuasion to get it to start moving. Should it slide freely once the lever unlocks it? Is there supposed to be much tension in the lever?

    Thanks.

  4. #4

    Join Date
    Jan 2001
    Posts
    128

    focussing an Omega Super Chromega D...Help!

    Once the lever is unlocked, the lens assembly should slide up and down the rails with no problem. As a matter of fact, once the lever is moved to unlocked position, the lens assembly should crash to the bottom of the rails if you don't catch it first. Maybe the rails are rusty. Or maybe the set screw that attaches the lever to the shaft its mounted on has come loose. Or maybe the locking mechanism is jammed.

  5. #5

    Join Date
    Jan 2001
    Posts
    128

    focussing an Omega Super Chromega D...Help!

    One other thing. I'm not sure exactly how the locking mechanism is configured, but I suspect some sort of cam or shaft that is forced against the rails. The lever usually has to be turned only about a quarter turn or less to lock it down. You just move the lever until it feels snug. Maybe someone locked it down too snugly and broke the mechanism. I have also seen some older enlargers where the locking mechanism had become so worn that it would no longer lock at all.

  6. #6

    Join Date
    Nov 1998
    Posts
    93

    focussing an Omega Super Chromega D...Help!

    One thing that I might mention. A 135 lens must be mounted on a cone that extends the lens down several inches from the bellows. If it is mounted in a flat lens board you will never get it to focus.

  7. #7
    Old School Wayne
    Join Date
    Dec 1999
    Posts
    1,175

    focussing an Omega Super Chromega D...Help!

    The lever is locked in the left position. Swing it to the right to unlock it. These can be sticky/tricky sometimes.

    A lens cone will be needed if its a D2 enlarger (but I dont think they had that lever), but if its a D5 or D6 it should have enough bellows without a cone.

  8. #8

    Join Date
    May 2000
    Posts
    18

    focussing an Omega Super Chromega D...Help!

    Eureka! (Well, it wasn't quite that dramatic.) Movng the carriage solved all my problems with focussing the enlarger. (The focus of the negatives is another issue entirely.) The locking knob seems to be broken, but the carriage tracks have enough friction that it stays put once it is adjusted.

    Thanks for your generous help!

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