The final film in the RPX line is their fast film, RPX 400. RPX 400 is not my favourite film of the trio; I’m not saying it’s a bad film, it’s just not my favourite. As the name says this is an ASA-400 film but has a substantial exposure latitude going down to 100 and up to 3200 but I would recommend that you stick to the 200 to 800 range for the best performance.
- Type: Panchromatic B&W Negative Film
- Base: Triacetate
- Film Speed: ASA-400, with a Latitude between ASA-100 and ASA-3200
- Formats Available: 35mm/120
There are two solid points on this film. The first is how easy it is to handle, many films of this time suffer from a centre line curl once it’s been processed and hung to dry. While some films this is very noticeable (I’m looking at you Tri-X) other are not as bad (HP5), this film despite the base materials stays flat making it easy to scan. The second point is that it has pleasing fine grain for a fast film. I only started to see heavy grain when shot at ASA-1600, and that’s in HC-110 Dilution A. The best developer I’ve found for this film is Pyrocat-HD at ASA-320 the fine grain nature of the film shines and the contrast point is dead on. I’ll probably even try this film out in Rodinal in one of the later weeks of the project!
The biggest problem I have with this film is contrast! Unless you develop it in a high-contrast developer like Rodinal, HC-110, or Pyrocat-HD, it becomes a muddy mess. It’s all a mess of greys. The developers include the specialised RPX-D and Xtol (diluted, not stock). This is also not a sharp film, it’s pretty soft around the edges in most developers, even HC-110 I find the film a touch too soft for my taste. Of course in Pyrocat-HD the film is sharp and probably will give similar results in Rodinal. And finally it comes down to the RPX-D developer, while it was designed for the film I really found that it didn’t do much over using something more normal like Xtol or HC-110.
Let me state again this isn’t a bad film, it just isn’t a favourite of mine. And that’s because it reminds me of HP5 (in 35mm) along with Delta 400 and TMax 400, these all aren’t bad films, it’s just I don’t like how they render contrast and it’s the same with RPX 400. But like anything, it’s all about freedom of choice, and if you like RPX 400, go for it, I am not one to stop you, this is just my view on the film.