Sorry if this shouldn't be here, and mods - feel free to move, if you feel it is inappropriate, just thought that since it was calibration related, it didn't really need to be anywhere else.

That said, my employer was acquired by another company several years ago, and after discontinuing their line of digital film recorders, they had an employee auction for many of the old parts that they used to build these devices, and I managed to get a box of matched sets of glass RGB filters that were in the color wheels of these things.

I have dozens of sets, and they have been sitting in my garage ever since, and now that I have been paying more attention to calibrating my TV's, I thought someone else might be able to use these, as well.

If I remember right, I have 2 sizes, circular, and roughly 1" dia. and 2.5" dia.

The film recorders were used in Hollywood special effects imaging, so while I don't have specifics on the quality, I would say that they should be nearly reference grade.

Not really looking to get anything for them, other than something nominal to offset the packaging/shipping costs - call it $10 ea.

Let me know if you want to see pics and I'll try to get them posted.

The problem is... the filter spectrum was no doubt optimized for the lamp being used in the original product the filters came from. Those filters are unlikey to be useful for anything BUT the product they came from. Spectrum analysis of the filters would reveal whether they would be useful for video display calibration - however, because virtually every product has different filter needs based on the lamp and other components used in the light path, it's highly unlikely these filters would be useful to anybody for video display calibration. And finally... filters change with age. Glass is better than plastic in this regard, but fading is STILL an issue, even with glass filters. High temperatures and high humidity accelerate fading (so does exposure to sunlight, but presumably that's not an issue here) - just the sort of conditions you find in a garage in the summer in many areas.

Video calibration requires very specific red, green, and blue filters - and any random filter is not likely to be suitable. There's more to filters than just looking red, green, or blue to the eye.