Hi, I can not tell you how much I appreciate the help I have received on this forum so far. It has certainly helped me venture into film photography after spending awhile in digital. I have a few more general questions: 1)Can you clean filters/polarizers with the same cleaning fluid as a lens? Can you clean them more often? 2)Is there a filter that is used for florescent lighting? 3)The specifications for my lens are F4-5.6. Yet when I have the camera on aperture priority sometimes, it goes up to 22. Is this just the maximum camera settings, or the lens settings? 4)Are there any general purpose-type filter you recommend for mixed lighting (i.e. compact fluorescents and incandescents, LCDs, etc.)?c 5)Besides the filters mentioned so far, are there any filters that are used rather often and what purpose do they serve? 6)I'm a bit confused about the concept of Exposure Compensation. It is on my digital camera but I never used it and I imagine it's quite different in film. Does it actually increase or decrease the amount of light needed to obtain the proper exposure (i.e. a change in shutter speed/aperture), or does it merely brighten or darken the image after it's been exposed? Thanks as always!