Celestron FirstScope 90AZ Instruction Manual

3, Celestron FirstScope 90AZ I I N N T T R R O O D D U U C C T T I I O O N N Thank you for purchasing this Celestron Refractor Telescope. This telescope is a precision scientific instrument. With it you will enjoy numerous objects in the sky—planets, nebulae, star clusters, galaxies and other astronom…

13, Flashlight, Night Vision - (#93588) - Celestron’s premium model for astronomy, using two red LED's to preserve night vision better than red filters or other devices. Brightness is adjustable. Operates on a single 9 volt battery (included). Light Pollution Reductio…

10, The air in our atmosphere acts as a lens, which bends and distorts incoming light rays. The amount of bending depends on air density. Varying temperature layers have different densities and, therefore, bend light differently. Light rays from the same object arrive slightly displaced, crea…

7, To determine the magnification using the standard 20mm eyepiece, simply divide the focal length of your telescope by the focal length of the eyepiece (20mm). For example, dividing the focal length of the Firstscope 90 (1000mm) by 20mm yields a magnification of 50 power. Magnification …

1, F F I I R R S S T T S S C C O O P P E E 9 9 0 0 A A Z Z T T E E L L E E S S C C O O P P E E I I N N S S T T R R U U C C T T I I O O N N M M A A N N U U A A L L …

4, Figure B and tightening it down with the knurled nuts. Orient the Star Pointer so that the glass window is facing towards the front of the tube. 9) Remove the lens cap from the front of the telescope. T T E E L L E E S S C C O O P P E E O O P P E E R R A A T T I I O O N N…