Hello ,,, I am old school camera . I still use a twin lens reflex , among others . I got a simple digital 3mp point and shoot last year and I love it but ... looking to upgrade . in the standard film camera SLR means you look through the lens to view and you see what the film will see . this enables you to change lenses and still see what you are recording . ect . .. now I see SLR , and "SLR type". the two things seem to be different. when I use the screen to view I am looking through the lens in any digital camera . so why would I want to have the reflex . I don't see it . I do want to change lenses , but that seems easy to do and I guess it is what is called SLR type . my question is why have the reflex element in a digital format ??