| 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 » | over 10 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 » | over 10 years ago | |||
| m005kennedy | "neat! " | Read more » | over 10 years ago |