Large-Format Lenses Lenses supplied by Sinar are available in two different mounts. Auto Aperture Mounts DB offer the greatest ease of operation because of automatic aperture control. On the other hand, Copal between-the-lens shutters are cost-efficient entry solutions on which all settings are manual. Product Overview: Sinaron DB Lenses Sinar Auto Aperture Mount DB are most convenient to operate. With its automatic aperture control they allow aperture settings of up to f/45 with the Sinar Auto Aperture Shutter. Auto Aperture Mount DB is the standard mount for all Sinaron large-format lenses. Sinaron Copal Lenses Sinaron large-format lenses can also be fitted with a Copal between-the-lens shutter. However, these type of lens mount do not offer the same operation convenience provided by the Sinar Auto Aperture Shutter and the lenses mounted in DB.

Image: Justin Cooper Sinaron Large Format Lenses - Table