as the title suggests, i am having issues with focusing my camera at night. you know it wouldn't be so bad if there was something to use as a refernce, but if i am in a dark field at night, how do i manually focus my camera accurately? i am shooting pictures of the night sky, from the horizon up for a mattepainting i am working on. i need the stars to be as crisp as possible, but with my mediocre eyesight looking through the tiny viewfinder at a dark sky, i have no idea if i am in or out of focus, the only way i can tell is when i get back to my computer screen. yeesh, help!