Refractor telescope aperture 152 mm focal length 1 200 mm focal ratio 179 optical systems fraunhofer achromatic refractor suitable for beginners enthusiasts max useful magnification 304 x tracking without ota mount without ota tripod not included telescope feature astrophotography suitable astrophotography function digiscoping lens barrel length 1 275 mm minimum useful magnification 21 resolution power 076 bogensekunden light collecting power