Quote Originally Posted by Dave Miller
I should also have said that it is most unlikely that your filters have faded in 10 years, my enlargers are nearer to 25 years old and still give the full grade range.
Same goes for my LPL7700. I think dichroic filters are like polarisers inasmuch as it's an inherent characteristic of the way they're made rather than the use of a dye or pigment, and therefore they don't "fade" as such. Check for free movement of the filter mechanism - I recently took the oil can to my LPL which made everything work a lot more smoothly. But be very sparing - you don't want oil drips on the diffuser or lens.