my konix 67mm is tightly fastened to my nikkor 18-70mm lens and i cant twist it at all. how can i get it out? how can i avoid this in future? also, when i look through the viewfinder, it seems a tad grainy and brown. is it because i am charging the battery and therefore it behaves this way? i heard somehwere that when there's no electricity the viewfinder behaves this way.