I've been trying to do portraits lately, and the only spot I have with a decent background is my living room. I cover the red couch with a black sheet, and the back curtains disappear, but they're just too narrow for a normal length lens. I've been DYING to try my Ektar 80mm f2.8 on my Canon, and I have a feeling that's gonna be a HUGE help.
Yes, I know the issue. The FIRST roll of photo background paper I bought was one of those "half-width" rolls....I have bought ONE of those in my lifetime....just...that...one....all the others have been 9 foot wide. It's just so restricting to have a narrow backdrop, unless you are using a long lens with a narrow angle of view.
Have you figured out an adapter rig-up for the "old Hassy mount" to EOS mount sit'ayshun???