Or shoot a roll of a slide film and bracket. If you position the umbrella 10' from a subject, your flash/umbrella Guide Number will be 10 x F-number of a slide you like the best.
Alex -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Len Paris Sent: Saturday, August 10, 2002 7:00 AM To: [EMAIL PROTECTED] Subject: Re: Basic umbrella reflector question We don't have a clue as to the reflectivity of the umbrella and that's not the only parameter involved, so there's no real hope of calculating a correction factor. Do as J.C.O said, get a flashmeter. Len --- ----- Original Message ----- From: "Simon King" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Saturday, August 10, 2002 5:18 AM Subject: Basic umbrella reflector question > Hi All, > Hope everyone's enjoying the weekend. > I just bought a gold reflector umbrella on a whim. I plan to use it with my > flash (G/N: 32m) > Can anyone tell me how I many stops I should adjust for it? > Thanks, > Simon > - > This message is from the Pentax-Discuss Mail List. To unsubscribe, > go to http://www.pdml.net and follow the directions. Don't forget to > visit the Pentax Users' Gallery at http://pug.komkon.org . - This message is from the Pentax-Discuss Mail List. To unsubscribe, go to http://www.pdml.net and follow the directions. Don't forget to visit the Pentax Users' Gallery at http://pug.komkon.org . - This message is from the Pentax-Discuss Mail List. To unsubscribe, go to http://www.pdml.net and follow the directions. Don't forget to visit the Pentax Users' Gallery at http://pug.komkon.org .
