Running a test with my new ORTHOTOPOSCOPE SS camera (6×12) and a non optimized pinhole of around F70 (optimized is around F130 for the 25mm focal length). I am looking at the following films with EI from approx 100-1600 all in developers I have found that works best for maximum compensation and best overall tonality with each specific film. Reciprocity corrections were kept to just a gerous doubling to time— with this type of camera and work I like to keep it simple if possible. Exposures ranged from 1 second to 30 seconds all handheld as that is my standard way of shooting with a pinhole system.
400TX • Diafine
400Tmax • 510 Pyro
Delta 3200 • 510 Pyro
Fuji 400CN • C41
Portra 400 • C41
CineStill 800T • C41
All test results will be converted to B&W as that is my current need with these materials.
UPDATE: So I’ve looked at the film and I am very drawn to the Porta 400 and VERY drawn to the Cinestill 800T when both are converted to B&W. The regular B&W film was amazing but due to the pinhole capture I had a lot more range of possibilities in the conversion process that really helped to bring out crazy tonal separation in the two color negative materials.
So currently in my JOBO CPP2 I am running Diafine full strength Part A and full strength Part B for 5 minutes for all BW films at rotation setting “F” which is around 40 rpm. After part B I increase the rotation to “P” which is around 80 rpm and keep it at that for the remainder of the process. My tests have shown that times around 7+ minutes in A/B can stain some films- yet 5 minutes in A/B at 75F seems about spot on to me and perfect for most scanning applications. The 1:1 development of Diafine decreases the shadow detail at higher EI… for example at 1:1 TX dies after about EI 800 whereas with the full strength process as outlined above EI 1600+ is very solid (note: box speed at 1:1 is about perfect- for box speed). With regards to streaking…. none, full strength or 1:1. An obvious advantage to full strength is that Diafine can be used over and over again for a lot of film where as the 1:1 is a one shot developer. I have personally used Diafine (1 gal A/B) full strength for well over a year without issue…. if it becomes a bit dirty just run it through a new clean coffee filter and presto! Perfect developer ready for more film.
Amazing couple of days running dozens of different developer tests all with 400TX… love the look of the grain and depth of this film! In the end I came back to an old friend but with a new twist. Diafine is back in my life in a big way! Diluted 1:1 and used as a one shot developer it is spot on in my JOBO with very nice grain, great tonality, no processing issues and best of all a usable EI from about 100-1250 (the chart shows 200-1600… I think 1600 is a bit on the edge for my works but is totally usable in a pinch. So again, in a JOBO speed is 4, temp does not really matter but I ran at 75F, Dilute part A and B 1:1… I did 3.5 minutes in each followed by a 2 min wash with water then fix (box time), clear (box time) and hang to dry…. easy as pie!
Of course an advantage of Diafine that I have written about here before is that many different films can be souped at the same time which is a huge time saver. Diafine negs are a bit flat and do requiere an “S” curve in PS to make me happy but I am now quite happy indeed. I will post links to Diafine articles I have written and a great one from a friend Sandy King from View Camera.
My suggest EI…. 800.
Viva la Revolution– Stephen
All images shot with a Leica MP with a 35MM Summicron ASPH… on Film!
as for articles here… there are a lot!!!! Just type in Diafine in the search box and enjoy!
Also please note these were just quick scans (first set) as I am leaving tomorrow for a week of shooting but the final scan (last image) is quite nice and shows the real potential for this amazing combo.