It will be perfect when you try it in the dark when you have a black background, the knob you
switch it on with also brightens and dims the red target lines, you can try it in a dark room or
cupboard. You need to be at a distance of about 18" to 2 ft away for it to be effective , keep
both eyes open when lining up, centre a star through the eyepiece of your scope, then adjust
the Rigel with the three knobs at the front, then move your scope to another star, using the Rigel
first, then look through the eyepiece and the star should be there, if not make the adjustment on
the Rigel.