I am relatively new to photography and im having a problem! im using a pentax k1000 and iv had no problems since i'v had it. recently when i advance the film, the shutter closes and i cant see anything out the view finder. it appears as though the pictures are still working but i cant see anything. am i doin something wrong? i think it might be the lense because i tried a telephoto for a few shots and i didnt do it...but i cant say forsure. also, the issue seems a tad intermittent...out of about 15 shots i think i could see out the viewfinder about 4 times. any ideas? is it my camera? my lense? me?