Thanks for this video! I believe that Retro 400S (my go-to infrared film) and Rollei Infrared (as well as CatLABS X Film 320 and JCH StreetPan 400!!!) are also the same emulsion, but I recently saw the Naked Photographer's analysis of Retro 400S and it seemed to be terribly pushed, so now I'm wondering if it isn't also, in fact, actually Agfa Aviphot Pan 80 too...
Both the RPX25 and 80S are Superpanchromatic, the original APX25 was an Orthopanchromatic film. Completely different spectral response characteristics.
Hmmm, that's a tricky one - it's not typical for Ilford to sell rebranded film made by others nor to allow their premium films (i.e. not Kentmere) to be rebranded. Might test them at some point!
Great comparison and images! Looking forward to the rest of this series! As for a future trial, pit HR50 against RPX25 or Retro 80s. And thanks for the shoutout!
Cheers, Alex! HR-50 is an interesting one, it's almost certainly a pre-flashed Aviphot 80/Retro 80S/RPX 25, with a very nice bump in shadow detail and smoother contrast. Crying shame they don't make it in 120 - perhaps the pre-flashing takes place after cutting master rolls into 35mm...
@@jpp0823 Yup, I'm glad I got to try Silvermax 100 before it went away, but sadly it went away before I had the chance to develop it in Scala development kit.
Most sources say Rollei Retro 400S is Agfa Aviphot 400S, which itself is now discontinued (as far as I can tell), so Rollei must be selling remaining stock. Not sure how much use there is in testing/demystifying a discontinued film... FWIW, other (probably in some way related) films like Rollei Infrared and JCH StreetPan are also nearing discontinuation.
Great content. Lol I felt lied by Rollei marketing, but overall it makes sense that some folks that are not much into all film techical stuff will find the difference between 80's and RPX25. Thanks for that vid.
Glad it was useful! The next installment of this series will be a lot... muddier 😱 Film manufacturers and brands sure do like to mess with us poor consumers.
Video @ 7:57 "Why ?" - Rollei's Retro 80S AGFA film, when accidentally underexposed, yields horrible shadow detail ! So 'Rollei' knowing that Pulling it to ASA/ISO 25, it obviously provided better latitude. Therefore, they renamed it RPX 25...
Nice comparison. I have both RPX25 & Retro 80S in 120 and was comparing the datasheets the other day to see their IR sensitivity, and noticed they were pretty similar, although Rollei rendered the spectral sensitivity charts differently, making them look different, which I thought was odd at the time. Too bad my last roll of Retro 80S had pretty severe print-through from the backing paper :( Will have to try out the remaining 80S & RPX25 and hope they fare better.
the only reason I have some Retro 80s in the fridge, because I wanted to shoot some IR and the Retro will give some wood effects if shot through a 715 nm filter. Has anyone checked, if RPX25 also offers the same results if shot through such a filter?
I shot plenty of RPX 25 with R72 and 695nm filters, didn't notice any difference compared to Retro 80S and would be surprised if there is any with the 715nm filter 😉
Thanks for watching! The problem with RPX 400 is that I'd have to test it against a whole bunch of 400 films, not just Kentmere... But then again, I'm not one to shy away from a challenge 😉
@@i.f.haddock527 The next film comparison is getting more expensive by the minute - hope they don't introduce Kentmere AND RPX in 4x5 in the meantime! 😅😂
RPX400 is likely similar to Agfa's APX400. Kentmere 400 is different, according to the Naked Photographer. They might all be made at Harman, but different emulsions.
