the infinity focus point assumes a specific temperature. if hotter or colder, the actual point moves somewhere else on the scale, depending on the lens. longer lens are more affected than shorter ones.
Herb... ----- Original Message ----- From: "Amita Guha" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Friday, August 15, 2003 19:29 Subject: shooting the moon at less than infinity > So last night the moon was out and it looked quite stunning without any > light pollution, so I stuck my Sigma 400mm f5.6 on my Super Program and > took some shots. The weird thing is that at infinity, the moon was out > of focus. It was in focus somewhere before infinity. Is this common when > shooting the moon? I thought it was odd but I shot it the way it > appeared in focus in the viewfinder.
