Kim, Much simpler!! Enlightening! Thank you! ;) Andy On Jan 20, 2011, at 10:52 PM, Kim Mosley wrote:
Here's another way. 16 x 16 / 10 = 25.6 Square root of 25.6=f/5 (rounded off) Or suppose you are at f/8 and you want 4 times more light. 8x8 (or 8 squared) / 4 = 16 Square root of 16 = f/4 We are just talking about the area of the aperture, right? No logs! -- Kim Mosley mrkimmosley@xxxxxxxxx Website: http://kimmosley.com Blog: http://kimmosley.com/blog
