Well said.
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Sorry about the website being down. I finally upgraded the server to Mac OS X Yosemite and had to figure out how to restart the web hosting application. Should be up and running now.
Here is an...
Thanks, Eric. It was a real pleasure to work with you too.
I have available on my website an LED VC enlarger head for the Omega D series 4x5 enlargers. It works very well and users, some of whom post on this forum, have been very pleased with it.
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Good explanation.
The problem with LED's is that commonly available, high-brightness units do not put out much light in the UV range where Lodima is most sensitive. High-brightness UV LED's are available but they are...
Lodima seems to require UV or near UV light. It is very insensitive to most visible light, much like Kodak AZO. Completely different than Fomalux.
I have built a custom, high output, blue LED 4x5 lamp for enlarging on to Fomalux silver chloride paper. The exposure times needed were comparable to those typical of standard enlarging paper. The...
The redirect is to www.modernenlargerlamps.com which is the real URL.
One of my Omega LED diffusion enlarger heads (Model 2 or Model 3) may work if you simply set it on top of the upper bellows of your Beseler enlarger. You would need to cut a piece of cardboard to...
No, because of the foam light seal at the bottom. If I were to make a 5x7 universal head, it would be much shallower and thus more efficient with light. Same with an 8x10 box. Some experimentation...
Version 1.1 of the app has been submitted to the Apple app store and is awaiting approval. It has a more fully paper-safe interface using only the color red since, with an RGB display, any color...
Some day, maybe. This current project is going to keep me busy for some time.
With the phone set to the lowest brightness, the app seems to be paper safe as close as 12 inches or so but I haven't tested it rigorously yet. Even at the lowest brightness the buttons are easily...
One more comment on the Android/Apple issue. As far as I know, the latest Android operating system still provides no native support for Bluetooth Low Energy (the latest Bluetooth protocol) and most...
Thanks for the comments.
No Beseler models are planned now, but maybe in the future.
The phone app could support tenths of a second if that is what is wanted. A color head is beyond my...
This is a demo video of a new LED based variable contrast lamp house I'm building for the Omega D series enlargers. The final product will be very similar to my Model 2 lamp house. I am interested...
White LED's are just blue LED's with added phosphors to secondarily emit the longer wavelengths. The phosphors are less than 100% efficient so the white LED's generally produce less light than their...
This is a follow-up to my last post. I ran some test prints tonight using my Omega diffusion housing with four Cree XP-E Royal Blue (450nM) LED's driven at 900 mA. Scans of the prints are attached....
Thanks for adding your thoughts. I've read your website maybe a dozen times trying to glean as much from it as I can. It's very strong work and greatly appreciated by me and I'm sure many others.
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Thanks for all the feedback. I will definitely put the larger format project on my list of things to do. Right now I'm working at perfecting a variable contrast model that uses blue and green...
By universal do you mean like what I have now but without the vertical arms attaching it to the enlarger? You would have to lift it with your hands.
There have been a few questions about how to set up the Model 2, so I have added a video to my website, www.modernenlargerlamps.com, showing the lamp house being installed and adjusted to eliminate...
Just wanted to announce that I am offering a new, LED powered, diffusion lamp house for the Omega D-series enlargers. The unit incorporates four Cree XM-L LED's and an external DC power supply. The...
Problem solved! I replaced the switching power supply with a transformer power supply and the lamps now come on virtually instantaneously! With this problem solved I'm going to go ahead build a few...
Thanks for the offer. I may take you up on it in a few weeks after I've gotten all the kinks worked out of this project.
Thanks. I'm using Krylon brand paint and lay on two thick coats before putting the parts in an oven at 170 degrees F. The paint wrinkles in about 10 minutes but takes about 3 hours in the oven to...
Thanks. I have a tiny bit more design to do before thinking about selling any of these. And I really want to solve this power-on delay issue. It doesn't really bother me but I'm sure it would...
That's a great idea. I had hoped to avoid making my own power supply because of cost and because I wanted something UL approved on the high voltage side. But you have gotten me thinking. Right...
Thanks for the compliment. I thought about it but I wanted to keep it really simple and inexpensive. Right now it just uses an off-the-shelf power brick.
Just finished this LED diffusion head for my Omega D2 enlarger. It entirely replaces the condenser head so you have to use under-the-lens filters. It works pretty well - the light is even and the...
Let me add to the excellent advice you have gotten already.
I suggest you use Cree warm white XP-E or the XM-L EasyWhite LED's. You want many, medium brightness LED's, not few really bright LED's...
Thanks for the compliment. They are still available. One has been sold and I have another made and ready to sell. I will be making at least two more and more than that if there is demand. I'll be...
Does the condenser head have a slot for VC filters?
Seems like most people like a diffusion enlarger head. With the Aristo head, you use below-the-lens VC filters, right?
I'll see if I can scrounge up a Besseler enlarger and see what I can do. Do many people use the condenser heads, do you suppose?
Here is the LED Lamp House with the new wrinkle paint.
No, this lamp has an active light zone that occupies only the central 3 inches of its lens. This was done to match the light source to the condensers built into the enlarger. As far as I know, most...
Since posting these for sale I changed the paint to a black wrinkle finish that matches the original finish on the Omega. I'll post a picture when I get to a computer ( I'm doing this on my phone)...
Just wanted everyone to know that I have dropped the price on the LED lamp house to just cover my expenses and a little for the time it takes me to make it. This is a product that I think many people...