i bought this old kodak tlr a couple of days ago. i've been reading about it(since i knew nothing about them)and after i had it i read that 620 film is no longer made..... my tlr, obviously takes 620 film.... would 120 film work for my camera? also, i need to know if there is any way i can clean the viewfinder type of thing on top..? is there any links on how to use them and thier vocab,i'm in dire need. any advise or suggestions would help a whole lot. thanks.