Like a kid on the ride home from the grocery store, not able to wait until he got home to get the toy out of the cereal box, i was the same with my first two filters i bought. i got home, slapped them on, went out and shot a roll. hurridly i took them to the one hour photo shop, waited what felt like an eternity, only to get my prints and find disappointment. I could not see any of the effects that i was hoping the filters would give me. I bought a diffusion and uv filter. Now i know the uv filter should not have much of an effect, but i was certainly expecting more from the diffusion filter. I had the diffusion filter on first, and the uv on top of that. Is there a certain way these need to be stacked to get a desired effect? is there an "ON" button that i overlooked? grrrrrrr i was using 400iso with B&W film.