PHOTOGRAPHY MODERATOR SOG Member '03 Finalist Taos SOPA '03 HonMen SoCal ASOPA '03 Finalist SoCal ASOPA '04 Finalist Taos SOPA
Joined: Dec 2001
Location: Tulsa, Oklahoma
Posts: 2,674
John,
If you would like an in depth explanation of the focal length multiplier (FLM) concept, this link should help. I read it again five min. ago and I've already forgot it.