Guess we are all pretty much the same, I have mostly TIffens - red, green, yellow, polarizer. Some older Kodak #6 filters for the Crown Graphic - love the storage case these came in - red, orange, yellow and green. Did pick up a B+W yellow, and a couple of Canon brand filters (who knows who made them). They all have done there job and age ranges from about 20 years to a couple..just picked up a used blue filter last month. Haven't used it yet...will use it for some of the yellow/white brick buildings to see how it affects the contrast.