Hello. I want to upgrade my skills on camera mapping workflow, so i interested in definig maximum parameters from still image. About half a year ago i saw i tip on fxguide.com about it. That was pretty useful. Now that page doesn`t exist on that forum, so i want ask some of yo if you have an offline copy of that page (if you know what i mean) or may be a link to a in-depth tutorial or some article about that. The main thing here is to get focal length. Thanks in advance