TS-PHOTON 8" F4 Advanced Newtonian OTA one is the R

one is the R

13 mm Apparent field of view (°)  82 Eye relief (mm)  12 Number of lenses 7 Connection (to the telescope)  1

Baader found two additional primary factors played into the equation – eye relief (and the related large eye lens size) and ease of viewing (a combination of long eye relief and control of pupil aberrations)

This mount is very popular with beginners in astronomy as it is very simple to operate

Interestingly

TS-PHOTON 8" F4 Advanced Newtonian OTA one is the RFeatures Fast parabolic optics with outstanding contrast and very good sharpness for planetary observations. High quality 2" Crayford focuser with 1: 10 dual speed for 2" and 1. 25" accessories. Focus position perfect for DSLR and other cameras. All popular 1. 25" and 2" eyepieces can be used without problems. Brighter image through enhanced 94% reflectivity of primary and secondary mirror. Motor focus can be retrofitted at any time. A 0. 5 mm thin