Rate this post by selecting a number. 1 is the worst and 5 is the best.

Author Message   Aphototaker Tinkerer Username: Aphototaker Post Number: 96 Registered: 12-2009 Rating: N/A Votes: 0 Posted on Monday, March 01, 2010 - 03:05 pm:    M_currie: I used an EOS 1N in partial metering mode. I pointed both cameras to the sky. But after your warning, I think I will try a couple of more cameras (EOS 5e and 50e), just to be sure. Meanwhile, I think the exact over exposure is 2 and 2/3 stops (+2.67). Gez, thanks for the hints. I have been trying to read up on the relevant material here. What really caught my eye was the report of some crystalline substance that builds up on the sensor cell's plastic or glass cover and needs to be scaped off, else it blocks the light reaching the sensor. https://kyp.hauslendale.com/classics/forum/messages/6900/5420.html But I haven't been able to find more on this kind of a problem. Can somebody shed more light on this issue? Thanks.