Timeline for Can I photograph a solar eclipse using a 10-stop Big Stopper (+ extra ND?)
Current License: CC BY-SA 3.0
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| Jul 1, 2017 at 11:54 | comment | added | JerryTheC | Be aware that performance at visual wavelengths is NOT a reliable guide to how well a filter blocks invisible IR and UV wavelengths which can damage your eyes. Proper solar filters - like the Baader Planetarium solar film - are safe. Things not designed as solar filters may or may not be - and since you only have one set of eyes, and the proper solar film is fairly inexpensive, it's not worth the risk of trying unknown alternatives - especially since any damage may not show up until several hours later. | |
| Mar 18, 2015 at 13:02 | comment | added | Philip Kendall♦ | I strongly suspect the person you were talking to was confused between transmission and stops. 14 stops = a reduction in light of 2^14 = 16384 times. 100,000 stops = a reduction in light of 2^100,000 = 10 ^ (100,000 / (ln(10) / ln(2))) = 10 ^ 30102 = as you say, a brick in front of the lens. (This is the same way that a "1000 ND filter" is actually 10 stops, because 2 ^ 10 = 1024). | |
| Mar 18, 2015 at 12:43 | review | First posts | |||
| Mar 18, 2015 at 14:01 | |||||
| Mar 18, 2015 at 12:39 | history | answered | Mike Urquhart | CC BY-SA 3.0 |