todd_niccole Posted May 21, 2019 Share Posted May 21, 2019 I don't want to argue around in circles but the the larger issue regardless of how and when such films were made is that they seem to be or suspected to be the same films/emulsions being rebranded. Maybe I need to make the point so this doesn't turn into a hairsplitting rhetorical discussion over what rebranded means but that the same emulsions represented in these respective films. Link to comment Share on other sites More sharing options...
andylynn Posted May 21, 2019 Share Posted May 21, 2019 For some films there is a lot of corroborating evidence in the datasheets. See the spectral plots for Rollei Infrared and Rollei Retropan 400s: practically the same. The spectral plot for Adox HR-50 Speed Boost and that of Rollei Retro 80s is largely the same. The Adox HR-50 spectral plot is cruder and more simplified but the curves more or less correspond to one another; That can't be a coincidence. I had tested both JCH and Rollei Retro 400 and came to the suspicion that they might be the same which was later confirmed with online search with hits going back several years. Largely the same and more or less corresponding mean not the same. A re-badge would be the same thing in a different box. Link to comment Share on other sites More sharing options...
Jean-Claude Posted May 21, 2019 Author Share Posted May 21, 2019 Reading some comments here, I think next time I will be more cautious when presenting an article on a "new" emulsion. :eek: Link to comment Share on other sites More sharing options...
todd_niccole Posted May 21, 2019 Share Posted May 21, 2019 Largely the same and more or less corresponding mean not the same. A re-badge would be the same thing in a different box. I phrased it as such because somebody is going to nitpick over some insignificant difference in how the spectral plot is presented. As I stated, some are a more simpler representation of spectral response despite otherwise being the same; One could overlay them on top top each other. Coincidence? Rollei Retropan 400s shows plotted sensitivity down to 300nm where Rollei Infrared doesn't. Link to comment Share on other sites More sharing options...
andylynn Posted May 22, 2019 Share Posted May 22, 2019 I phrased it as such because somebody is going to nitpick over some insignificant difference in how the spectral plot is presented. As I stated, some are a more simpler representation of spectral response despite otherwise being the same; One could overlay them on top top each other. Coincidence? Rollei Retropan 400s shows plotted sensitivity down to 300nm where Rollei Infrared doesn't. So what you’re saying is that this is all speculation and you’re accusing these highly regarded people who are friends of some of us here of lying in advertising their products without being able to provide evidence. 1 Link to comment Share on other sites More sharing options...
todd_niccole Posted May 22, 2019 Share Posted May 22, 2019 (edited) So what you’re saying is that this is all speculation and you’re accusing these highly regarded people who are friends of some of us here of lying in advertising their products without being able to provide evidence. Since you put that way, I would say yes in some cases, particularly with Rollei in marketing the same film as Infrared and Retropan 400s.The "Infrared" sells at a higher price! And who are these highly regarded people you're referring to? Does anybody on this board work for these companies that I seem to have missed? You might want to reread my posts in the entire thread to understand how I have come to my suspicions about CatLab films and others and some firm conclusions in other cases. To reiterate, I've test many of these films in question with a more technical procedure other than simply taking pictures to compare, compared datasheets and many of them have peculiar common specs depending on the film.. Some of this you can confirm for yourself if you care to compare stated specs between these films. If it walks like a duck and quacks likes a duck, it's Agfa-Gevaert Aviphot film. Edited May 22, 2019 by todd_niccole Link to comment Share on other sites More sharing options...
andylynn Posted May 22, 2019 Share Posted May 22, 2019 Okay, so, now that that’s out of the way, back to the topic. New 80 ISO b&w film available. Moderate contrast, high latitude. Somebody try it and report back, I only have 35mm cameras right now so I can’t. 2 Link to comment Share on other sites More sharing options...
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