Heat Absorbing Glass for Omega D5

[Hiernst]

Anyone know of any sources for Heat Absorbing Glass for an Omega D5XL? I've searched the forums and found several sources (Edmund, Surplus Shed, etc.) for the glass in general, but they are all small sizes. I figure the one for the D5 is a 6x6 square, but please correct me if I'm wrong. I've contacted KHB and they don't have any either. Any suggestions anyone?

 

[Rick Jones]

I would start by contacting Harry at Classic Enlargers. http://www.classic-enlargers.com/

 

[Hiernst]

Thanks, Rick.

Harry doesn't have it listed on his site, but I've emailed him just in case.

Anyone have any other sources?

 

[Photo Engineer]

Many glass shops sell HA or Heat Absorbing glass. They cut it to order and it is not expensive. It also works very well.

PE

 

[Ken Nadvornick]

Anyone have any other sources?

I know this will be a frustrating response, but perhaps a month or two ago I ran across an online place that claimed to supply custom sized heat absorbing glass sheets in small quantities.

I also have an Omega D5 (XL) and although I'm currently using an Aristo head, I've stockpiled a stash of enlarger bulbs for the Armageddon and thought a 6x6 piece of glass would be nice to have as well.

After reading your post I spent a long time last evening trying to find the place, but wasn't able to. I had saved the link for future reference on a different computer. That computer crashed two days ago.

I'll keep looking, but if you engage in a little bit of creative Googling you may turn it up as well...

Ken

 

[Dave_ON]

I need heat absorbing glass in my D5XL?......Hmmmmmm.....I've been using mine for 12 years with S, M and LF. Maybe I should think about getting heat absorbing glass.

OK seriously....if you're using a 211 bulb you shouldn't need it. If you're using a 212 bulb, yes by all means find some.

 

[Hiernst]

Hi Dave,

I've just pulled out the D5XL I bought years ago and never got the chance to use. A 150W bulb was installed in it. I put a 67 neg in there and the heat buckled the negative. I replaced it with a 75W bulb and retried it. It still seemed as if there was a bit of a buckle - maybe it was residual heat from the 150W, I don't know - but I figure it can't hurt to put in a piece of Heat Absorbing Glass for current and future purposes. It just seems so difficult to find!

 

[Rick Jones]

How I check for negative "pop": With a grain focuser and negative in place in a cold enlarger focus as soon as you turn on the enlarger. Continue watching the grain pattern for 30 to 45 seconds. If you have a problem the sharp grain pattern will usually turn to mush within 15 to 20 seconds. In my experience,this can happen even with a 75W bulb. If you have a problem and can't immediately find HA glass you can always prepop (is that a word) the negative, slide the paper in your easel and expose.

 

[Dave_ON]

Thanks Hiernst...good advice. Nothing to lose by using it and everything to gain.

If anyone carries it, KHB Photographix will. I just sent them an email and will post it when I get a reply.

BTW, what are you using since you retired the D5?

Dave

 

[Dave_ON]

I forgot to mention, I use 6x6 filters above the condensor. I've never had any buckling or warping on those either, but if I find some HAG I'll do the astute thing.

 

[Photo Engineer]

A filament bulb that is used for lighting is a heater that happens to give some light in the process!

All filament bulbs are rich in "heat" which is IR radiation. Therefore a HA glass should be used to reduce heat. An HA glass is mandatory in color to prevent odd artifacts due to IR exposure of the red sensitive layer.

We at EK got several of the early HA glass samples at automotive glass shops, but we went to better glass as time went on. There are many varieties and sources. I bought mine at an automotive glass shop myself.

I mentioned that above.

PE

 

[Hiernst]

Dan,

The D5XL was bought about 7 years ago and never used - shamefully sitting in storage (my small apartment not allowing me the room to use it). I've finally arranged for a small space to set it up outside of my own place - this past weekend cleaning, installing a sink, blacking out the space, building tables and print drying racks - getting it all set up. Now I would just like to find a simple piece of HA Glass and find the time to print.


It will be so nice to have my own darkroom again instead of renting space at a communal darkroom.

 

[Dave_ON]

Here's the answer to my email from Dave at KHB Photographix......

"The 473-103 Rectangular Heat Absorbing Glass for the DV lamphouse is a problem. Apparently Omega is no longer able to supply this item, and we are currently looking for an alternate supplier."

 

[Dave_ON]

Here's the D5 heat absorbing glass if anyone's still looking, albeit a little pricey.....I still don't think I need it though.

http://www.ebay.ca/sch/i.html?_from...13&_nkw=heat+absorbing+glass+omega&_sacat=625

 

[ic-racer]

Don't put off enlarging looking for something that you may never find. Use the 75W bulb and start printing. Even if you do find a HA glass, it won't eliminate negative movement. You will need a glass carrier for that. You have to learn how to heat the negative up and focus it just before the exposure to use a glassless carrier with a condenser head. This is "Darkroom 101" stuff.

Think of this heat absorbing glass more like the heat absorbing glass in a movie projector. It keeps your film from burning, not from popping.