maksutov-cassegrain telescope for adults kids astronomy beginners, sarblue mak60 catadioptric compound telescope 750x60mm, compact portable travel telescope, with tabletop tripod phone adapter sarblue sarblue planet mate 60 set includes: telescope tube angled image erector 20mm photo eyepiece tabletop tripod smartphone adaptor specification: optical design: maksutov-cassegrain aperture: 60mm eyepiece diameter: 20mm magnification: 37.5x telescope focal length: 750mm optical coatings: fully multi-coated notice: never use the telescope to look directly at the sun. avoid staining the mirrors with your fingers.