Birns & Sawyer Zoom Combifinder Model K lens mount_Pentax K which is pretty decent

which is pretty decent

The 7Artisans 7

A classic wide-angle lens for M42 mount

Leitz Or (orange) filter for the 5cm Elmar lens and others with a 39mm filter thread

Note that this is the AI version

Birns & Sawyer Zoom Combifinder Model K lens mount_Pentax K which is pretty decentThe Birns & Sawyer Zoom Combifinder Model K is a director's viewfinder for standard 4: 3 format 16mm and Super 35mm. A handy accessory that lets you quickly get a feel for the field of view of lenses from 18mm 150mm (in Super 35 format) and 8mm 75mm (in 16mm format). Also very useful for looking like an important person who knows what they're doing, if you're in the right crowd. In excellent condition. Includes neckstrap.