I've been thinking a lot lately about how to correctly calibrate my
various light meters. I have several, of both the incident/lumisphere and reflective/spot types, and they're all over the place. Not only do I want them to match, I'd also like them to all give the "correct" reading based on standards and specifications.
The Internet is chock full of people sharing their rules-of-thumb and get-it-in-the-ballpark methods, but pretty much none of those even vaguely resemble what a professional might do. The closest you'll ever get to that, is recommendations for specific labs that can do calibration.
What no one ever talks about, is how those labs actually do it.
That being said, I've recently decided to tackle the problem myself. While I'm never going to match the setup of a full-blown metrology lab, I should at least be able to attempt a somewhat calculated approach.
