Originally posted by dsmithhfx How do you like it? What steps does it automate? What are its advantages over 'normal' tank dev?
I like it a lot, but also have some reservations. It is meant to be used in a high volume context, and to use it fully, it ought to have its own temperature-regulated water supply. I use it in “travel mode” with water for pre-soak and rinsing supplied by a 12V pump from a basin that I have filled beforehand with water at the correct temperature.
After that everything is automated. It can develop from one to five 35mm films at a time or one to six 120 roll films at a time. Chemical consumption is quite low: 170ml for one 35mm film, 250ml for two 35mm films or 650ml for 5 35mm films. Similarly, just 125ml for one 120 film, 250ml for two 120 films or 660 for six 120 films. It uses special Jobo drums of much larger diameter than Paterson tanks: one that can take one 35mm film, one that can take two 35mm films on two reels or one or two 120 films on one reel, and finally one that can take up to five 35mm reels or three 120 reels (up to six 120 films). The pouring and emptying of chemicals are of course automatic. The same goes for pre-soak, rinses and final wash.
The processor regulates the chemistry temperature at exactly 38.0°C for colour and 24.0°C B/W.
It has fourteen development programs:
E-6 6-bath and E-6 6-bath one step push or pull
E-6 3-bath and E-6 3-bath one step push or pull
C-41 3-bath standard and push one stop
C-41 2-bath
B/W 5 min., 7 min., 9 min., 11 min., or 14 min.
(RA-4 Mono for RA-4 prints from colour negatives)
and two cleaning programs.
On the ATL-1000, these programs are fixed, but on the ATL-1500, which I have, you can also reprogram the times and temps of the various programs.
The biggest advantage is not so much time-saving as consistency. With the proper chemicals the results are very clean, even and consistent from film to film and from time to time. But of course it is nice to be able to process for instance five 35mm films or up to six 120 films in one go.
The biggest disadvantage is that reclaiming of chemicals is difficult (it can be done, but the chemicals will probably be contaminated, as only one hose is used for the emptying of all chemicals). Not much of a concern with B/W development, especially since chemical consumption is quite low, but a limiting factor when processing colour film. When I process colour films (E-6 or C-41), I don’t reclaim the chemicals and can therefore only develop eight films with a one-litre kit (which otherwise could be used for 12-14 films or more). I therefore tend to process (especially colour) film in batches.
Jobo did make a special Chemical Separator #4220 as an add-on, but I have never seen one.
If I want to develop one film right away, I tend to process it manually in a Paterson tank. If I have several films that need to be developed, I use the Jobo. If I want to be sure of the top-quality results, I also use the Jobo.