Bay Filters

Bayonet Mounted Filters
With a bayonet mount you just line the filter up with the appropriate markings on the lens and then twist it on until it locks itself into place. It's just like a short snapping motion.

A bayonet style filter works the same as a screw on filter as it is also a piece of glass or plastic that is held inside a ring. The only difference really is the mounting attachment.

Certain manufacturers, most notably Rollei and Hasselblad, have created their own systems of bayonet mount for filters. Each design comes in several sizes, such as Bay I through Bay VIII for Rollei, and Bay 50 through Bay 104 for Hasselblad, B+W, Heliopan, Rollei.

 

Bayonet Format Bay Filters 1 2 3 4 6 50 60 70               104 B+W                                 Ultraviolet (UV) Filter                       UV Haze 010 F-Pro Filter                           UV-415 (2B) UV-Blocking Filter                               420 UV-Blocking Glass Filter                               486 Digital UV/IR Blocking Glass Filter                               Circular Polarizer                     Linear Polarizer                     Graduated Filters                               Neutral Density Filters                     Hasselblad 1 2 3 4 6 50 60 70               104 UV-Sky Glass Filter                             Linear Polarizer                             Neutral Density Filters                             Heliopan                                 UV Filters                 Circular Polarizer                       Linear Polarizer                 Graduated Filters                               Neutral Density Filters                 Hoya                                 Ultraviolet UV(0) Haze Multicoated Filter                               Rollei                                 UV Glass Filter                               Circular Polarizer                               Sailwind                                 UV Filters                               Tiffen 1 2 3 4 6 50 60 70               104 UV Protector Filter                               Linear Polarizer