Thanks for that Matt i have just been out and tested it again done all the things you have mention also after watching the Aussy Pard videos they say exactly what you have pointed out so after doing all that in pitch black surrounding in night mode black and white picture is very grainy not good at all i can,t see it being the Optisan CP3 scope because its a cracking little scope but i think i have tried almost every thing day time image seems pretty good it is night mode whats grainy i could do with someone Local thanks for your advice