1.25" 2x Focal Extender 18-4mm-eye-relief Its 70mm aperture and 350mm

Its 70mm aperture and 350mm focal length provide bright

You do not have to give up your current mount to enjoy the full benefits of a Telescope Drive Master from Explore Scientific

Water-resistant and rubber-coated for protection against minor bumps

and nebulae into sharp view

Built to withstand public star parties and educational outreach

1.25" 2x Focal Extender 18-4mm-eye-relief Its 70mm aperture and 350mmA good Focal Extender adds some real versatility to your telescope accessory line up. First of all, it allows you to increase the magnification of any eyepiece with the same barrel size that you already own. In other words, 3 eyepieces offer 6 magnification choices with the addition of a focal extender. Secondly, most of the time, lower magnification eyepieces have better eye relief than higher power models. When using a focal extender to increase