Celestron Dielectric Star Diagonal 1.25" With Twist-Lock (93571) Accessory You will need a user

You will need a user supplied USB A-to-B cable

25" OIII narrowband filter isolates just the two doubly-ionized oxygen lines (496 and 501nm lines) emitted by planetary and emission nebulae

83") Weight: 8 oz (226

This tool has a special cleaning tip that works without the need for liquids

Celestron Dielectric Star Diagonal 1.25" With Twist-Lock (93571) Accessory You will need a userEnsure maximum light transmission without loss of optical quality with the Celestron Dielectric Star Diagonal, 1. 25 with Twist Lock. Upgrade your existing star diagonal to this premium one and enjoy brighter, sharper images without replacing your telescope. This star diagonal reflects the telescopes light path 90 to provide a more comfortable viewing angle. In addition, the glass has 58 layers of dielectric coatings, which provide an over 99%