Odd Omega DII Lamp House design - light leak possible?

Thread view:

Enable EMail Alerts

Start New Thread

Thread rating:

Philip Wang - 04 Apr 2004 05:44 GMT

I was looking at my Omega DII lamp house. There are a few big holes on the
top of the lamp house acting as vent of the heat generated by the light
bulb. When I turn on the light there are plenty of light coming out from
those holes projected onto the ceiling and reflected back to the room.

My question is, is it obvious that this will cause some trouble of light
leak?

Anyone tried to cover those venting holes during the enlarging process -
and I find the lamp house is very hot so venting seems is really needed.

Thanks,
- philip

Reply to this Message

Alecj - 04 Apr 2004 05:53 GMT

Yes, you are absolutely right, that light being reflected back down from the
ceiling will deteriorate [fog] your print. But, closing off those holes
will cause premature failure of your bulb.

In that case, get some black cloth, like felt, and attach it to the ceiling
so it won't reflect back. If you'll do some "before" and "after" prints, I
believe you'll see a difference. Try it. It won't be expensive. Just a
big square, maybe 3x3' should do it.

> I was looking at my Omega DII lamp house. There are a few big holes on the
> top of the lamp house acting as vent of the heat generated by the light
[quoted text clipped - 9 lines]
> Thanks,
> - philip

Reply to this Message

David Nebenzahl - 04 Apr 2004 06:16 GMT

On 4/3/2004 8:53 PM Alecj spake thus (bottom posted for continuity):

>> I was looking at my Omega DII lamp house. There are a few big holes on the
>> top of the lamp house acting as vent of the heat generated by the light
[quoted text clipped - 15 lines]
> believe you'll see a difference. Try it. It won't be expensive. Just a
> big square, maybe 3x3' should do it.

Alternatively, how about rigging up some kind of light baffle just above the
holes on the lamphouse? You should be able to do something with black
illustration board or something similar, to block the light but not the air
circulation.

Signature

... but never have I encountered a guy who could not be bothered
to make his own case on his own show.

- Eric Alterman on his appearance on Dennis Miller's bomb of a show
on CNBC (3/17/04)

Reply to this Message

Dan Quinn - 04 Apr 2004 23:00 GMT

> I was looking at my Omega DII lamp house. There are a few big holes on the
> top of the lamp house acting as vent of the heat generated by the light
> bulb. When I turn on the light there are plenty of light coming out from
> those holes projected onto the ceiling and reflected back to the room.

I think some part may be missing. Check inside the lamp housing;
perhaps some empty screw holes. Dan