| Lens Help Hi, My Wife as just bought a OPTON 500 mm f/8 manual focus super telephoto lens ( wich allso has a x2 convertor with it ) for me wich i am hoping to use on my Pentax K100D. The only thing is i can not seem to Focus in on things far away. I am not sure what settings to put my camera on. All the Lens as on it is a Focusing Ring on the end. Thank you. Barry |