When looking at the technical data, 70mm aperture may not look too impressive. During the observation the impact of the 36 % more light gathering power in respect to a 60mm refractor are easily visible: Details are seen more clearly in the Bresser Sirius and from a distance of 600 million km the main cloud bands on the planet Jupiter get visible. With the included smartphone camera adapter you can take pictures of your best observations right through the telescope.Features:Telescope for night and solar observationMgF2-coated opticsMagnification with supplied accessories: 45x, 135x, 225x, 675x (max. suggested: 140x)Focal distance, aperture ratio: 900mm, f/12.9Azimuthal mountingEyepiece diameter: 31.7mm (1.25?)The kit includes:Sirius refractorAltazimuth mountAluminium tripod with accessory trayAperture solar-filterEyepieces: 4mm, 20mm3x Barlow lensDiagonal mirrorSmartphone camera adapterSoftware & moon map via downloadBrandBresser GmbH, GermanyWarranty, years2Package size (LxWxH), cm93x3