Focusing distance changes the aperture on macro lens as you add more extension you are effectively making the aperture smaller. That is how I understand it.
----- Original Message ----- From: "Juan Buhler" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Wednesday, March 09, 2005 6:22 PM Subject: Re: CCD cleaning > Bingo. That did it, thanks Godfrey, it makes sense to me now. So the > aperture matters, but the focusing distance shouldn't. > > Thanks! > > j
