Adox CHS II vs Ilford FP4+?

[tokyo_blues]

I would be interested in hearing from anyone who has personally compared the two. Any major differences in spectral response? How about characteristic curves? What does CHS II excel at?

I heard Adox has reintroduced CHS II in roll film format. Trying to decide if it could replace FP4+ in 120 and sheet film for me or not. I usually have Rodinal, D23, D76 ready to go in the house. Xtol at times. Thank you in advance.

[thomasskeens]

I would be interested in hearing from anyone who has personally compared the two. Any major differences in spectral response? How about characteristic curves? What does CHS II excel at?
uno online (https://uno-online.io)
I heard Adox has reintroduced CHS II in roll film format. Trying to decide if it could replace FP4+ in 120 and sheet film for me or not. I usually have Rodinal, D23, D76 ready to go in the house. Xtol at times. Thank you in advance.

I have shot the Adox in 4x5.. In 4x5 I think it is just a smoother toned negative. compared to the Ilford, it's been awhile

[paulbarden]

I use both.
I routinely have to expose CHS 100 II at 40 ASA to get shadow detail where I want it, compared to FP4 which I rate at 80 ASA to get similar results. However, I feel that the Adox emulsion still delivers less shadow detail than FP4, and it appears in the final print that the Adox image has a more sudden transition to black with very little detail, whereas FP4 has a more even transition with plenty of shadow information.
I like both films a lot, but they deliver different results and have to be exposed/developed a bit differently. I don't do the whole sensitometry thing, but my impression is that the CHS 100 II renders a more punchy image, especially in the mid-tones, wheras FP4 is very balanced throughout the value scale. I also get the impression that CHS 100 II is an extended red film, which contributes to its look.

[Bormental]

In this thread (https://www.photrio.com/forum/threads/thoughts-on-adox-film-offer-as-opposed-to-their-chemistry-offer.201564/page-4) on Photrio Henning Serger said that CHS II offers higher resolution than FP4+ and has a different spectral sensitivity (darker reds).

[tokyo_blues]

I use both.
I routinely have to expose CHS 100 II at 40 ASA to get shadow detail where I want it, compared to FP4 which I rate at 80 ASA to get similar results. However, I feel that the Adox emulsion still delivers less shadow detail than FP4, and it appears in the final print that the Adox image has a more sudden transition to black with very little detail, whereas FP4 has a more even transition with plenty of shadow information.
I like both films a lot, but they deliver different results and have to be exposed/developed a bit differently. I don't do the whole sensitometry thing, but my impression is that the CHS 100 II renders a more punchy image, especially in the mid-tones, wheras FP4 is very balanced throughout the value scale. I also get the impression that CHS 100 II is an extended red film, which contributes to its look.

Very useful insight thanks Paul

[tokyo_blues]

In this thread (https://www.photrio.com/forum/threads/thoughts-on-adox-film-offer-as-opposed-to-their-chemistry-offer.201564/page-4) on Photrio Henning Serger said that CHS II offers higher resolution than FP4+ and has a different spectral sensitivity (darker reds).

Thanks for the link