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.