Recently I bought my first film camera - Asahi Pentax Spotmatic with a 58mm Helios-44m-6 and was loaded with s fujicolor c200. Lightmeter is not working so had to do it manually. Pictures below are some of my test shots. They have some sort horizontal lines in the middle and a thick vertical line. Well most of my remaining shots were fine but some had this problem where in there's a black part on the right side. I need your expertise, thanks in advance.