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.

Sinar Lens Philosophy

Sinaron Objektiv

In lenses for 35 mm and for medium format photography, aperture is often regarded as a primary criterion, but in lenses for large format photography it is more the image circle on the focusing screen and the angle subtended by that image circle that matters. The larger that circle, the greater the freedom for camera adjustments. This becomes a decisive factor especially for the larger camera formats.

Sinar´s Sinaron lenses are subjected to strict inspection controls and then mounted with exacting care on lens boards, either with between-the-lens shutters, or with automatic aperture control for the DB version of behind-the-lens shutters.