Originally Posted by ashfaque
RPX 400 and 100 aren't rebadged Kentmeres. The corresponding development times with the same developer that are mentioned in their respective tech. dataheet, are somewhat different in many instances.
But their datasheets are problematic in some cases. For example the resolution values given for RPX 25 are pure fantasy. They have nothing to do with reality.
If you compare RPX 100 with Kentmere 100, and RPX 400 with Kentmere 400 directly, if you compare identical shot pictures, you will see
- same sharpness
- same level of grain
- same resolution
- same tonality (same transfer of colours into grey tones).
If you make identical shots both on RPX and Kentmere, and then make prints from it and make a blind test:
You very very likely will be unable to tell which picture is from Kentmere and which is from RPX.
For your personal photography it doesn't matter whether you are using Kentmere or RPX. What you can do with the one, you can also do with the other.
Only difference: RPX is available in 120, Kentmere is not.