Koraks build one himself, there is a great description of it on his web page. It looks very impressive, but it takes some time, effort, and quite a bit of talent to achieve a project like that!
...although I love Heiland products, I purchased Jurgen's densitometer when it came out and it is an amazing piece of equipment, and I have just ordered his safelight, you will not see any difference between using his cold light and a dichroic head.
my old Durst M670 makes a hell of a noise (sometimes)
I have three Zone VI VC cold light heads, with RH Designs vario f stop timers fabulous. Of course I got the enlargers for the cost of a box of sheet film today. These are just a bit quirky.
Marisa Tomei
"So tell me, how is it that a man like you, so bald, so quirky and funny, how is it you're not taken?"
Not sure which controller you have for the Heiland head. The simpler model I have allows me adjust the light over a 2-stop range, but does not offer any analysis or automation. So I just make test strips as usual, fine by me. Not sure what you mean by soft, though.I use the Heiland splitgrade and LED head on my Beseler. I really had to get used to the short exposure time, the light is very bright. It is very soft too, which is good, but I had to lengthen my development times with 15 or 20% compared to the condensor head. That said, I’m now happy with my results and the quality of my prints.
Heiland Splitgrade promisses a lot of less work and says that test prints aren‘t necessary anymore. That is not true. Especially while they never update the standard times for film-paper combinations. Some important papers like Bergger neutral tone have never been added to the software and papers like AGFA Classic are in the system but are not available anymore. Adding your own standard times is far from user friendly, I don’t understand it at least.
No fan; it's the transformer. A little kick now and then shuts it up for a while.
Not sure which controller you have for the Heiland head. The simpler model I have allows me adjust the light over a 2-stop range, but does not offer any analysis or automation. So I just make test strips as usual, fine by me. Not sure what you mean by soft, though.
What I mean is the light is like with the Aristo cold light head more diffuse.
It is less bouncing back from the blacks in the negative than with a condenser head
Indeed, and as such, it prints at a lower contrast than a condenser setup with a collimated light source.
Sorry, no, backscatter has nothing to do with this. The amount of backscatter at the negative/film stage won't be different between a condenser vs. diffuser setup; the directionality will be different, but this doesn't matter since the backscatter is simply absorbed by the light source and/or surrounding parts. Moreover, it's the black parts of the negative that absorb light the most (so it would be less in the dark parts of the negative), although backscatter will generally be an interaction between the light and the film surface in which case it's the same regardless of negative density (which is transmissive density especially when looked at the film base side; you can verify this with any random negative).
Moreover, the backscatter effect doesn't do much, other than add a tiny bit of diffusion to a condenser setup (but it'll be insignificant). In a diffuser setup, it won't do anything at all. Backscatter at the paper plane does play a role, but again is no different between a condenser and diffuser setup and it's the reason why enlarger parts around the lens are generally matte black; it's to prevent this backscatter to project back onto the print, reducing contrast.
When it comes to the contrast characteristics of a Heiland head, it's no different than any other diffuse light source. What's different mostly is the wavelength of the light, which is narrow-band; for B&W this doesn't really matter, but for color work it's a significant factor.
I have three Zone VI VC cold light heads, with RH Designs vario f stop timers fabulous. Of course I got the enlargers for the cost of a box of sheet film today. These are just a bit quirky.
Marisa Tomei
"So tell me, how is it that a man like you, so bald, so quirky and funny, how is it you're not taken?"
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