Rollei Rolleiflex Hellrot Red Lens Filter Bay I 28.5mm -Clean-

This is the strong contrast black and white filter. If you want dramatic skies and your friends looking like vampires then this is the one that you want. It is Rollei Bay I (28.5mm) and fits all of the Tessars and Xenars with bayonets.

This is one is in clean condition with clean scratch-free glass. The mount shows very light wear. It comes in the cool vintage case.