Maurizio Di Cintio Posted October 8, 2013 Share Posted October 8, 2013 Hi all. I'm in the process to receive a lens for my Beaulieu 6008 and I'd like to know if all C-Mount lenses have to be collimated or, in the case of lenses that are not actually screwed on but are equipped with a ring which "fastens" the lens to the body (llike the standard Schneider or the Angenieux 6-90 with LCU), such a process may be waived; in fact I suspect the different way the lens is attached to the camera makes it impossible to have microscopic variations in the rear element-to film plane distance which usually accounts for the need of collimation. Or, is there a way to assess if a lens actually needs collimation? Possibly by shooting some feet of film? I guess with rather poor light so as to have the iris work at maximum aperture AND the focal length set at the widest. How does it sound? Link to comment Share on other sites More sharing options...
Andries Molenaar Posted October 9, 2013 Share Posted October 9, 2013 Just shoot some film from a tripod. :) Use wide aperture and focus on the ground-glass circle in the viewfinder. Do several shots and find objects nearby and at infinity with many sharp lines. Judge the film using a viewer or microscope. Link to comment Share on other sites More sharing options...
Maurizio Di Cintio Posted October 9, 2013 Author Share Posted October 9, 2013 Thank you. I'l do like you suggested. Link to comment Share on other sites More sharing options...
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