Mark Eastman Posted May 16 Share Posted May 16 (edited) I recently got results back of shooting a roll of Film Photography Project's 16mm FPP40 40 ASA black and white reversal double perf amateur film on a vintage Bell & Howell 70DR Has anyone else used this 16mm film? I had it processed by a lab in Southern California. I shot my roll as a test roll on a well used vintage Bell & Howell 70DR camera. I exposed based on the shutter speed spec of the 70DR camera at 24 FPS. Results were 2 to 3 stops all overexposed. Was it: 1. Camera shutter speed off for 24FPS? 2. Actual sensitivity of the FPP40 bw reversal film? 3. How the lab developed the film? I did a range of exposure tests, but not the full aperture range, that I would do next time with an old vintage camera of unknown condition. On the film, Film Photography Project would not tell what film this is as they said it was proprietary, understood (ORWO?) Next time will stick with Kodak films I've shot that I know what they do. Mark Mark Eastman Palo Alto, California USA Edited May 16 by Mark Eastman Link to comment Share on other sites More sharing options...
Premium Member Simon Wyss Posted May 16 Premium Member Share Posted May 16 Maybe they mistook ORWO UN 54 for Kodak Plus-X reversal what FPP 40 actually is. UN 54 is an ISO 100 negative film. The reversing process increases effective speed by about 100 percent. 1 Link to comment Share on other sites More sharing options...
Premium Member Okto Simaia Posted May 17 Premium Member Share Posted May 17 You’re saying FPP 40 is Plus-X or it’s UN 54? Link to comment Share on other sites More sharing options...
Premium Member Simon Wyss Posted May 17 Premium Member Share Posted May 17 FPP 40 is Kodak Plus-X reversal. There was also Plus-X negative film. ORWO U(niversal) N(egative) type 54 reverse processed would yield an effective sensitivity of ISO 200. The Kodak reversal films PXR, TXR, and 4XR are negative stocks with a few changes to them. They are coated on blue or grey triacetate base, which didn’t hurt with TV but covers detail in the brightest areas at projection. You can reverse every negative film but you can’t develop any reversal stock to a negative. For instance, Fomapan R(eversal) 100 that has a pure silver layer between base and photographic coating turns out black after simple development. The silver needs to be bleached and dissolved out to free the image. What’s the purpose of this silver layer? The same as the dyed film base, it’s a halo protection. What is halo? The effect is known since glass plate photography was begun, the unwanted glow around highlights caused by excess light bouncing back from the first and from the second glass surfaces into the photographic layer. If you shoot on print film such as Kodak 2302/3302 or ORWO PF 2 you have that. Please, newbies, read some books. Link to comment Share on other sites More sharing options...
Joerg Polzfusz Posted May 17 Share Posted May 17 On 5/16/2024 at 5:01 AM, Mark Eastman said: Camera shutter speed off for 24FPS? If the camera’s shutter speed was „off enough“ to produce 2-3 f-stops overexposure, then the camera would have to also record the actual transport of the film. (Underexposure is a different topic, especially when using cameras with a variable shutter that might be damaged or that might have been accidentally ignored when setting the f-stop.) What shutter speed did you calculate with? Which lightmeter did you use? Was it designed before 1960, when the ASA-rating-system was drastically changed (ASA PH2.5-1960)? And are you sure that it’s using an ASA-scale (instead of Weston, GE, Scheiner, DIN, GOST, ISO, …)? Link to comment Share on other sites More sharing options...
Mark Eastman Posted May 17 Author Share Posted May 17 I used 1/40th of a second exposure for 24FPS on the 70DR. I measured exposure with a modern Gossen Digital Luna Pro F at the cinema settings and the ambient dome. I know the meter is accurate from previous results. Mark Mark Eastman Palo Alto, California Link to comment Share on other sites More sharing options...
Joerg Polzfusz Posted May 17 Share Posted May 17 Hi Mark, 1/40 s at 24fps makes sense as the shutter seems to have a 207° opening. No offense regarding the light meter. I only noticed that the production of the camera started before the „ASA update“. Hence, you might have used a light meter that came with the camera and that is as old as or even older than the camera. Does anyone know the differences in developing B&W reversal? At least Andec is processing the Kodak-reversal filmstocks separately from Foma/ORWO/Russian stocks. When the lab has mistaken your Kodak-film with ORWO-film, it might be a problem caused by them… (But that’s just a wild guess. I have not got any clue about developing.) Link to comment Share on other sites More sharing options...
Premium Member Simon Wyss Posted May 18 Premium Member Share Posted May 18 204. Link to comment Share on other sites More sharing options...
Mark Eastman Posted May 20 Author Share Posted May 20 On 5/16/2024 at 9:57 PM, Simon Wyss said: FPP 40 is Kodak Plus-X reversal. There was also Plus-X negative film. ORWO U(niversal) N(egative) type 54 reverse processed would yield an effective sensitivity of ISO 200 [ [snip] Please, newbies, read some books. Hi Simon, Thanks for clarifying. What is the current availability of Kodak Plus-X in 16mm? It appears to have been discontinued long ago, at least from Eastman Kodak. On books, besides the standard cinematography related books (Cinema Workshop, American Cinematographer Manual, etc.) and current film manufacturer data sheets, if you have any recs on books that cover current cinema film stocks, this would be appreciated. Thanks Mark Mark Eastman Palo Alto, CA USA (My grandfather's name was George, but unrelated to the big E) Link to comment Share on other sites More sharing options...
Mark Eastman Posted May 21 Author Share Posted May 21 On 5/15/2024 at 10:10 PM, Simon Wyss said: Maybe they mistook ORWO UN 54 for Kodak Plus-X reversal what FPP 40 actually is. UN 54 is an ISO 100 negative film. The reversing process increases effective speed by about 100 percent. I emailed Michael Raso at Film Photography Project about my problem with their BW40 film and he stated that this film is not Kodak Plus-X. Mark Mark Eastman Palo Alto, CA Link to comment Share on other sites More sharing options...
Premium Member Simon Wyss Posted May 21 Premium Member Share Posted May 21 That makes it difficult to imagine what stock they’re using. ISO 40? Link to comment Share on other sites More sharing options...
Joerg Polzfusz Posted May 21 Share Posted May 21 Are there any edge markings on the film that marks it as Svema, Agfa, Orwo or Fuji? Link to comment Share on other sites More sharing options...
Mark Eastman Posted May 21 Author Share Posted May 21 8 hours ago, Joerg Polzfusz said: Are there any edge markings on the film that marks it as Svema, Agfa, Orwo or Fuji? No edge markings on the processed roll. Mark Mark Eastman Palo Alto, CA Link to comment Share on other sites More sharing options...
Premium Member Simon Wyss Posted May 22 Premium Member Share Posted May 22 It could be ORWO DN 2, cut to 16 by FilmoTec, perforated in Wolfen as well or by Wittner. Link to comment Share on other sites More sharing options...
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