Field Flattener For f/5 to f/7 Refractors Clearance this high-quality telescope is a

this high-quality telescope is a perfect grab-and-go instrument for spontaneous stargazing sessions

1500 mm focal length (f/4

and easy to see

8” (2032 mm) f/10 Edge HD  includes StarBright XLT coatings for better light transmission

Design: 4-element optical layout designed specifically for the EdgeHD 8" to maintain the flat-field performance of the EdgeHD optical design

Field Flattener For f/5 to f/7 Refractors Clearance this high-quality telescope is aThis is a field flattener for refractor type telescopes with a focal ratio of f 5 to f 7 Causes no change to the telescope focal length 2 inch barrel to easily attach to a two inch focuser Fully multi coated optics T ring thread on the device so a T ring can be used to easily attach a DSLR camera or a dedicated astrocamera 38 mm of clear aperture Requires 55mm (+ 2) of back focus spacing between the device and the camera sensor Premium high glossy