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Where does the film exactly start?
On which mark does the film really start? What does the arrows exactly mean?
Regards Mark |
#2
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Where does the film exactly start?
"Marek" wrote...
On which mark does the film really start? What does the arrows exactly mean? If at all, the arrows should be lined up with some markings on the cassette. For example, in Hasselblad film backs the holding bracket for the giving spool has a small red triangle. When you anchor the paper in the receiving spool, you feed the paper until the arrows on the giving spool show up. Then you put the cassette into the back. The counter is at 0, you give it a hand wind until the counter reaches 1, that ensures that the film is ready. In some cameras (Rolleiflex comes to mind) there is no use for the arrows, the film is thicker than the paper backing, so when it enters the feeding path, the camera resets the counter to the right position, so the first frame is exposed on the film. V |
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Where does the film exactly start?
Marek wrote:
On which mark does the film really start? What does the arrows exactly mean? I measured a few backing papers from fuji, kodak, agfa, forte and macophot. It varies a bit with brand, but the film starts between 7 and 7 1/2 inches after the arrow. The tape which attaches the film covers up the first little bit, so if you were designing a film counting mechanism, you wouldn't want to count on starting any closer than 8 inches from the start arrow. Peter. -- |
#4
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Where does the film exactly start?
Recently, Victor Bazarov posted:
"Marek" wrote... On which mark does the film really start? What does the arrows exactly mean? If at all, the arrows should be lined up with some markings on the cassette. For example, in Hasselblad film backs the holding bracket for the giving spool has a small red triangle. When you anchor the paper in the receiving spool, you feed the paper until the arrows on the giving spool show up. Then you put the cassette into the back. The counter is at 0, you give it a hand wind until the counter reaches 1, that ensures that the film is ready. In some cameras (Rolleiflex comes to mind) there is no use for the arrows, the film is thicker than the paper backing, so when it enters the feeding path, the camera resets the counter to the right position, so the first frame is exposed on the film. Interesting notion, but whether or not there is a "use for the arrows", they exist on the Rollei 6000 series cassettes as well. Neil |
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