Article View: sci.electronics
Article #20468Re: Flashbulbs
From: Andrew Koenig
Date: Fri, 20 Jan 1989 18:43
Date: Fri, 20 Jan 1989 18:43
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In article <1818@maccs.McMaster.CA>, nusip@maccs.McMaster.CA (Mike Borza) writes: > Pardon my ignorance, but... doesn't this mean that shutter speed is > essentially irrelevant for a flash picture taken using an electronic > flash? If so, how does one control the exposure? Correct -- shutter speed is irrelevant for pictures taken with electronic flash. You can vary three things to control exposure: aperture, distance from flash to subject, and flash intensity. Some flash units do not allow the intensity to be varied. Others have sensors that measure the amount of light reflected from the subject and adjust the intensity appropriately. -- --Andrew Koenig ark@europa.att.com
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arc1-ca.pugleaf.net!utzoo!attcan!uunet!lll-winken!ncis.llnl.gov!helios.ee.lbl.gov!nosc!ucsd!rutgers!bellcore!faline!thumper!ulysses!andante!alice!arkReferences:
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Path: arc1-ca.pugleaf.net!utzoo!attcan!uunet!lll-winken!ncis.llnl.gov!helios.ee.lbl.gov!nosc!ucsd!rutgers!bellcore!faline!thumper!ulysses!andante!alice!ark From: ark@alice.UUCP (Andrew Koenig) Newsgroups: sci.electronics,rec.photo Subject: Re: Flashbulbs Message-ID: <8805@alice.UUCP> Date: 20 Jan 89 18:43:55 GMT References: <9844@sequent.UUCP> <1818@maccs.McMaster.CA> Organization: AT&T Bell Laboratories, Liberty Corner NJ Lines: 17