My widest lens is 90mm. Sometimes this is not wide enough for interior shooting . Is 75mm sufficiently wider than 90mm (i.e. is it really that much wider?) or should I consider one of the ultrawides (55, 58, 65mm)? I use a Linhof Master Technika both hand-held as well as on a tripod. The wides t lens that can be cammed for hand-held use is a 75mm. Lenses from 55 to 65mm r equire a wide angle focus attachement.