can anyone tell me how to remove the time ajust knob so i can replace the lens?

YES,YOU HAVE TO FIND SOMETHING TO KEEP THE SHAFT FROM SPINNING LIKE A PAIR OF PLIERS OR SOMETHING YOU CAN HOLD THE SHAFT WITHOUT DAMAGING IT,THAN UNSCREW THE KNOB COUNTERCLOCKWISE.YOU CAN OBTAIN THE SPACE TO GRAB THE SHAFT BY GENTLY PULLING IT OUT A LITTLE.IT WOULD BE EASIER TO TELL YOU ON THE PHONE.IF YOU NEED TO CALL ME MY NUMBER IS:954-721-1459.I WOULD BE GLAD TO HELP YOU.TERRY

thanks Terry,i will give it a try.