hi. I'm Dongjoo Kim. student who studying photography in korea. I Plan to take a infrared photo in this summer vacation. today, I shoot first roll of my Rollei infrared 400 film. after develop, I found my flim is VERY transparent. Theres no image on the film. but the end of the film(Part of the film that came out from film magazine) is black. I think this means developer is worked. I don't know what's wrong. Can you help me? I use Rollei infrared 400 @ ISO 25, cheap infrared filter(massa IR 760), Minolta dynax7 body and Sony 24-70ZA. Developed 6min D-76(stock).