Monochrome film filters used with a Rolleiflex 2.8D. They are red and yellow, and I believe they attach to the taking lens. I'm selling my Rolleiflex and no longer have a use for them, so I'm offering them at a bargain price. I no longer know the detailed specifications or the manufacturer (whether they are genuine or not). Please judge from the images. Compatible with Bay III. [Items for Sale] ・Bayonet-type filters compatible with Rolleiflex Bay III ・1 red filter, 1 yellow filter