I have no idea or preference for either formula. Thats why I calculated and posted the data using both methods.
---------------------------------------------------------------------------- J.C. O'Connell mailto:[EMAIL PROTECTED] http://jcoconnell.com ---------------------------------------------------------------------------- -----Original Message----- From: Steve Jolly [mailto:[EMAIL PROTECTED] Sent: Monday, January 26, 2004 6:17 PM To: [EMAIL PROTECTED] Subject: Re: D: SMC 1.4/50mm FA / APS vs FF J. C. O'Connell wrote: > This conflicts with dozens of web publications state the > formula I used and posted. I didnt see a single instance > of steves formula. Not that he's wrong of course. Yep, and Herb pointed me (off-list) at one particularly detailed site that explicitly stated (without justification) that "my" formula was incorrect. :-) So I don't know. The formula without the squares still seems wrong to me, but I haven't done the maths to prove it one way or another. FWIW, "my" formula fits the one piece of available data better than "yours". Take your pick. :-) S
