Here is a nice item for the Rollei 35 user. I have the camera here and use mine for Black & White. It is a fun little camera but the filters can be hard to come by. The only one I can find selling the 24mm size is Bower. I have used these personally and I am pleased with the results. If I didn't like them I wouldn't sell them. The Rollei cameras have two sizes of front rings, only the Sonnar 40mm f2.8 lens is 30.5mm diameter, all other lenses are 24mm diameter. This is a high quality glass filter, coated on both sides or "double coated" as it is commonly referred to, made by Bower. The Anti-reflective Coating reduces surface reflections, allowing maximum light transmission. Reduces or eliminates the possibility of flare or unwanted reflections in your photographs.
The filter ring is metal and threaded on both sides. Great filter to use for landscapes and for people. I know many people that use this filter for all their photographs. The result is a nice warm tone especially skin tones and landscapes. In the early days of the Optical industry, around the 1920's, an eyeglass lens color was made called Cruxlight. The lens color was, and still is, the same color as this filter. The lens was made for people to wear that have eyes that are sensitive to light. What it does is change the bright white light to a softer Rose color, there by coining the phrase "looking at the world through Rose colored glasses".
