Hallo Warren, Many thanks for your comments. I have to find out the basic exposure correctly now. With the help of Bill and you, things look much simpler now. No, completed calculations and refering to nomogram.
With regards, Ayash. On Fri, 9 Aug 2002, W.Xato wrote: > <<<Date: Sat, 10 Aug 2002 01:18:57 +0530 (IST) > From: Ayash Kanto Mukherjee > <[EMAIL PROTECTED]> > Subject: Re: Twin flash for Macro: Some thoughts > > I have no idea for how much extension of bellow and > separation between the > flash & subject such cancellation takes place. >>> > > Maybe it was because the 80mm lens I was using was a > 1:1 lens, which meant that it was symetrical on both > sides of the lens. So, moving the lens closer to the > subject moved the flash closer to the subject at the > same time. Result, little or no compensation required > once the basic correct exposure was arrived at from > trial & error. > > <<<If the guide number of the flash that you use are > not > matching with with > mine, the aperture value will be different in my case. > > However, it can be > adjusted to f/8 by adjusting the flash to subject > distance. > But hey, I > don't know how much separation there should be.>>> > > I think I would adjust the aperture a bit rather than > the flash because it worked so well for me. > > Warren > HotJobs - Search Thousands of New Jobs > http://www.hotjobs.com > - > 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 .
