How to calibrate a red dot finder:
This Asin does not include a CR-2032 battery, please make sure that it is installed before use.
1. Attach the red dot finder to the base of the telescope.
2. Rotate and open the small rotation control on the side, you can see the red dot and adjust it to the appropriate brightness.
3. Point your telescope to something like a TV aerial or a chimney - anything about that size will do, and the further away the better. Looking through a low power eyepiece (25mm is ideal) find the object by adjusting your telescope and focus the object. Adjust the mount using the slow motion controls so that the object is right in the center of the view.
4. Adjust the finder so that the red dot is exactly on the object you were looking at. You can adjust it by using the two larger wheels. The one on the right at the front does the left/right direction and the one at the back on the bottom does the up and down.
5. Switch it off and wait until dark.
6. You now use it by switching the finder on, then looking through the finder so that the red dot lines up on to the target you are going to observe through your telescope. Once the red dot is exactly over the star or planet it should be exactly in the center of your eyepiece view.
Remember to switch it off once you have found your target to save the battery.