Simple modern B&W 8x10 enlarger head

[Ginette]

Sorry, I have no desire to take them apart, I leave destructive testing to my brother, he seldom puts things back together...

They don't have external screws and seem to be folded aluminum put together by machine. That silver is extruded aluminum.

As I have stated, I think these work a little better because we use only the center of the light and not right to the edges.

Experimentation is never free, we always pay with time or money.

I bet my brother could sawzall any enlarger to fit with these heads.

ymmv

Thanks for the information about the construction of theses units, Randy, so it is not easy to modify. Can you tell me about the exact size, they give weirds measures online :

Is the Lightpad 920 fit into the 138 condenser space 8 1/2" wide x 7 3/4" deep by 2 1/8" high. I think no, when I look at the dimensions given online. (measures 8-3/5-Inch by 11-3/6-Inch) If the unit put in vertical way, the 7" neg will probably not be covered, right?)
Is the Lightpad 930 fit into the 184 condenser space 14 1/4" x 14 1/4" square by 7" high. Dimensions given online is very close to theses ones (measures 11-3/4-inch length by 14-3/5-inch !!!)

[Tin Can]

The links in my post go directly to the Artograph website, where the dimensions are clearly and correctly stated in both metric and US Standard.

The lighted portion is exactly as stated as are total external measurement.

I would allow 1/8" for fudge factor.

[mdarnton]

Randy, while you're playing with this thing, would you mind taking a meter reading up close, off the center. I'd like to know exactly how bright yours is, in comparison with a different brand that I bought. Mine gives EV 12 @ EI 100.

http://www.amazon.com/Huion-Ultra-th.../dp/B00J0UUHPO
It sounds similar, including being slightly brighter around the perimeter, mostly top and bottom, but the center seems very even. I'm using it for copying negs with my digital camera and for 5x7 it's fine. I haven't tried it on 8x10. It seems like the worst of the brighter area may be beyond the film edges....

I had thought about putting it on the back of my camera, to make an enlarger as you have, but I'm not sure if it will be bright enough.

[Tin Can]

Sorry guys, these are now installed and I am not removing them for any more fiddling or measurements.

I might add, I taped them down with gaff tape to foam core, which works well but does not remove without damaging the foam core.

Then I need to cut new foam core and use more gaff tape, Oh, the expenses of experimentation!

As for the light output, I will have actual printing times soon with the 8x10.

The 5x7 link has real world printing times and examples.



I would use the metric sizes as they are mostly Chinese made.

I am on to to other tasks.

Randy, while you're playing with this thing, would you mind taking a meter reading off the center. I'd like to know exactly how bright yours is, in comparison with a different brand that I bought. Mine gives EV 12 @ EI 100.

[Ginette]

Randy, while you're playing with this thing, would you mind taking a meter reading up close, off the center. I'd like to know exactly how bright yours is, in comparison with a different brand that I bought. Mine gives EV 12 @ EI 100.

http://www.amazon.com/Huion-Ultra-th.../dp/B00J0UUHPO
It sounds similar, including being slightly brighter around the perimeter, mostly top and bottom, but the center seems very even. I'm using it for copying negs with my digital camera and for 5x7 it's fine. I haven't tried it on 8x10. It seems like the worst of the brighter area may be beyond the film edges....

I had thought about putting it on the back of my camera, to make an enlarger as you have, but I'm not sure if it will be bright enough.

So the Lightpad 930 at 14 3/5" !! (= 370mm official size) exceed by 5/16" the Durst 184 condenser but your Huion unit, Mdarnton, look to fit :

The whole light pad dimension including black frame is 10-5/8" x 14" with diagonal of 17.7". The Illuminated is 9" x 12.5"

Keep posting about your results with this Huion unit if you try it on 8x10 enlarger.

[mdarnton]

Well, if someone else buys one of those boxes and doesn't mind pointing a meter at it, I'd be happy for the info. It will tell me if I should go ahead with what I have, or not.

[Tin Can]

I just added my reasons for not removing my setups below.

It's $117 from Amazon and returnable.

That's less than anything LF I have bought in years.

Where do you live? I am near the Western Blue Line.

Maybe you need to drop in...

That's an invitation. Bring your meter.

Well, if someone else buys one of those boxes and doesn't mind pointing a meter at it, I'd be happy for the info. It will tell me if I should go ahead with what I have, or not.

[mdarnton]

Thanks for the invite...I will do that at some point in the near future--I want to see your setup.
I'm on the lake, near Wrigley Field.

[Tin Can]

f8 is the sweet spot

[evan clarke]

Does this really work?