posted May 01, 2012 02:37 PM
My first posting on this forum.
The "2-4 obt" mechanism is a refinement for adjusting for either two, or four-bladed shutter. The advantage is to increase light output and reduce flicker at silent film speeds.
posted July 03, 2012 09:24 AM
Ça veut dire, pardon me, obt. is obturations, obscurations. You can project down to 12 f. p. s. free from flicker with such a model.