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31
votes
8answers
70k views

Is camera flash actually harmful to infants or newborns?

I just got a new off-camera flash, and the instruction manual says: Never fire the flash unit closer than 1 meter from infants. This was a little startling to me, since one of the main reasons I ...
30
votes
7answers
3k views

If I swallowed my SD Card would it be readable when it emerged?

I am entirely serious. As I walked conspicuously down a narrow alley this morning with my camera hanging off my shoulder I began considering how I would/could respond to a bit of rough treatment by ...
10
votes
2answers
2k views

Can using an old flash damage a new DSLR?

I have been using my dad's old Metz mecablitz 18 B1 flash for a while with my Canon 7D and had no trouble with it, but just received some advice from a friend that using old flashes can fry the ...
12
votes
3answers
2k views

What kind of dose can you expect from a radioactive lens?

I read that lens makers used to use radioactive glass to increase the refractive index property of their lenses. How radioactive are they? Here are some example dosages; where would looking through ...
13
votes
4answers
1k views

Using carbon-fiber tripods in cold weather: safe temperatures, precautions, and effects of failure

I'm considering buying Manfrotto 055CXPRO3 carbon-fiber tripod legs with a Manfrotto 498RC2 ball head, but I've read that carbon fiber can break at low temperatures. (Note that the 055CXPRO3 uses ...