My father has two old lenses he used on his Russian built Zenit 3 (or 3M maybe?) back in the 1960s. A Zeniton (made in Japan); Telephoto f=135 mm1:3.5; No M10858 and a Focal (made in ?); f=35 mm; 1:2.8; No. 74116; screw mount Would I be able to use either of these on my Gf1 with an adaptor? If yes, which adapter do I need to look at and would it be worth it for these lenses? Many thanks!