Refractor telescope aperture 102 mm focal length 1 000 mm focal ratio 198 optical systems fraunhofer achromatic refractor suitable for beginners experts max useful magnification 204 x tracking equatorial mount equatorial mount goto exos 2 tripod steel tripod features goto telescope feature astrophotography suitable astrophotography function digiscoping lens barrel length 1 000 mm minimum useful magnification 14 coating multi coated series br