My grandparents were kind enough to give me their old Yashica MAT-124 a few days ago, and I can't wait to use it! I wasnt to shoot slides, though, and I was wondering if the light meter is reliable enough. Also, from what I understand, it uses a 1.3V mercury battery that aren't available anymore; will it function correctly with any other batteries? Not to ask TOOO many questions at once, but what is a good place to buy slide film (35mm and 120) online? Wolf Camera is heinously expensive, and all they have is 35mm Provia 100f... not that it's a bad film, but I would like to try velvia, as well.