Richard, I had the same concerns when I first heard the claims that this film could be used anywhere from EI 25 to EI 6400. They claim it has three photosensitive layers, each with a different sensitivity. That is why you have to use the special developer to "unlock" the multi-speed capabilities (layers). With ordinary developers it has a nominal speed of ISO 400. At least, that's what they claim. I have not used this film myself. Cheers, -Aaron On May 9, 2005, at 4:50 PM, Richard Knoppow wrote: > While its nice to have another supplier of film around I > am not too happy with this stuff being introduced as somehow > "magic" film which doesn't work like any other. --- Rollei List - Post to rollei_list@xxxxxxxxxxxxx - Subscribe at rollei_list-request@xxxxxxxxxxxxx with 'subscribe' in the subject field OR by logging into www.freelists.org - Unsubscribe at rollei_list-request@xxxxxxxxxxxxx with 'unsubscribe' in the subject field OR by logging into www.freelists.org - Online, searchable archives are available at //www.freelists.org/archives/rollei_list