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JesseCrooks (talk | contribs) (→Sprocket Design By Film Gauge: Added images of VKF and Posi-Trol sprockets.) |
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====LaVezzi Posi-Trol==== | ====LaVezzi Posi-Trol==== | ||
After the use of CS perfs died out in the early 1980s, LaVezzi redesigned their VKF sprockets to only accommodate film with KS perforations. They recentered the sprocket teeth to align with KS perfs and widened the teeth on one side to fill more of the width of the perforation. This “positive control” resulted in increased horizontal stability. However, these sprockets cannot be used with CS perfs, and can present issues with shrunken KS perfs. As a result, they are not recommended for archival projection. | After the use of CS perfs died out in the early 1980s, LaVezzi redesigned their VKF sprockets to only accommodate film with KS perforations. They recentered the sprocket teeth to align with KS perfs and widened the teeth on one side to fill more of the width of the perforation. This “positive control” resulted in increased horizontal stability. However, these sprockets cannot be used with CS perfs, and can present issues with shrunken KS perfs. As a result, they are not recommended for archival projection. | ||
<gallery widths=150px heights=150px mode=packed> | |||
File:CS and VKF sprocket teeth.png|A comparison of CS and VKF sprocket teeth, shown within a CS perf (black) and KS perf (white). | |||
File:Posi-Trol sprocket teeth.png|Posi-Trol sprocket teeth, shown within KS perfs. | |||
</gallery> | |||
===16mm=== | ===16mm=== | ||