Comments

Author Comment Last activity Moderation
m005kennedy "It was an article about making an exposure meter for use in film photography with real IF film. real IR film is no longer made now. I am pretty sur..." | Read more » about 8 years ago
m005kennedy "I thought I read once, that with the appropriate filter solar cells or CDS cells could measure infra red light accurately(not just near IR). Might ..." | Read more » about 8 years ago
m005kennedy "neat! " | Read more » about 8 years ago