My Brockway Norwood Director is my main light meter. I got it for $5 with the case, three slides, the disc, and the grid. It reads 1/6 stop less light than a brand new Sekonic Studio Deluxe L-398A, and Quality Light Metric says it is solely because of the slightly yellowed dome. The guy there says that the domes yellowing is the most common problem they have. Most are more yellowed than mine is. I lost one of the slides and cracked the clear plastic outer case once (swung my jacket on in a rush, and the meter was in the pocket and hit a sign post), so I perched and waited on E-Bay till I found a lot of two of them (plus some other old reflected meter) with slides, cases, and some other stuff, and I pounced for $25 shipped. They both had badly yellowed domes, though they work just fine if you compensate for this. I got them just for the half dozen spare slides, for a new clear outer case to replace the cracked one, and for a leather case that was in better condition than the one I had. I have accidentally submerged my meter more times than I can count, and it always dries out just as accurate as ever. I also got the slide kit that is currently offered by Sekonic. For a total of about $60 invested so far in the meter, spares, and the accessory slides, and another $40 on having it looked over by Q.L.M. (no "service" needed), I'd say I have easily got my money's worth, and I would recommend them to anyone, as long as the dome is still white.