In article <19960128110720XWE4JPK@cpua.it.luc.edu>, XWE4JPK@cpua.it.luc.edu says...

>Hi, I've got a simple newbie question: Can I change lenses
>on my SLR (Pentax Super Program) midroll without having
>to worry about exposing the film? Or do I have to
>fumble in a dark closet to change the lenses?

Go right ahead and change that lens! (Though I would avoid really
bright light while doing it.) That's what focal-plane shutters are for
-> protecting the film plane from light while you change lenses.
Hope This Helps