>> |
Anonymous
http://answers.yahoo.com/question/index?qid=20071119153713AAOjj9K go-go-gadget interwebs!
essence of the post: slr's will point the sun directly at your eye, not your sensor, unless you've a)got shutter lock on for some dumb reason or b)have live view on your dslr. in the case of live view, it might burn the live view sensor (a smaller secondary sensor) if you point it at the sun for a long time.
http://66.218.69.11/search/cache?ei=UTF-8&p=sun+reaction+ozone+filter+sunrise+sunset&y=Searc h&fr=yfp-t-501&u=en.wikipedia.org/wiki/Sun%3Fredirect%3Dno&w=sun+reaction+ozone+filter+f ilters+sunrise+sunset&d=OaEtc_H_Qh6N&icp=1&.intl=us also from the interwebs,
"During sunrise and sunset, sunlight is attenuated due to Rayleigh scattering and Mie scattering from a particularly long passage through Earth's atmosphere and the direct Sun is sometimes faint enough to be viewed comfortably with the naked eye or safely with optics (provided there is no risk of bright sunlight suddenly appearing through a break between clouds). Hazy conditions, atmospheric dust, and high humidity contribute to this atmospheric attenuation.
Attenuating filters to view the Sun should be specifically designed for that use: some improvised filters pass UV or IR rays that can harm the eye at high brightness levels. Filters on telescopes or binoculars should be on the objective lens or aperture, never on the eyepiece, because eyepiece filters can suddenly crack or shatter due to high heat loads from the absorbed sunlight. Welding glass #14 is an acceptable solar filter, but "black" exposed photographic film is not (it passes too much infrared)."
I always thought there was a chemical reaction to sunlight that increased the atmospheres ability to filter sun, thus sunrise was super harsh and sunset was very mild, due to the increased amount of sun induced resistance in the atmosphere. but damn, if wikipedia doesn't say so, I guess thats not how it is.
|