I have used a 24mm lens to shot a family group shot before. Although, in retrospect I would have chosen a 28mm because of the exagerated foreground and perspective distortion. I did have a 50mm lens with me and I would have to have been very far away from the people to get them all in. You can see the result at my flickr account here if you please: http://www.flickr.com/photos/marcusk...35372/sizes/l/ I was using a canon A-1 with the 24mm 2.8 lens stopped down to f/11. The film was HP5+ rated at 400 ISO and processed in HC-110 dil. H. I was in the picture so, I tripod was necessary. While I haven't shot large format I'm sure 35mm or even medium format would be adequate for the needs of most clients.