Celestron 12V 7A PowerTank Power Supply - 18774 Skywatcher GoTo Telescopes 4 Angstrom on either side

4 Angstrom on either side of the centerline

unlike other manufacturer''s filters

and the Barlow lens doubles the magnification power of any eyepiece used with it  You end up with four magnifications instead of two

Nitrogen Filled (Fog Proof): Yes

Accessory Tray: Yes

Celestron 12V 7A PowerTank Power Supply - 18774 Skywatcher GoTo Telescopes 4 Angstrom on either sideAbout the Celestron PowerTank 12v Power Supply Now you can take your telescope anywhere with this portable rechargeable power supply the Celestron PowerTank. Whether you have a computerized telescope or operate your telescope using motors, Celestron specially designed this product with the amateur astronomer in mind this model is packed with useful features. Not only useful for setting up and powering your scope, the Celestron PowerTank can also be