Most used altazimuth mount by beginners to professionals.Featuring excellent rigidity, stability, and portability, the popular PORTA II altazimuth mount is chosen and used by a great number of users from amature to professional. Using the supplied erect image diagonal, you can observe terrestrial landscape in daytime and you can shoot moon using optional accessories.Specifications:Model: VX39952- Optical Design: Achromatic refractor- Aperture: 80mm- Focal Length: 910mm- Focal Ratio: f/11.4- Eyepiece Barrel Diameter: 3.125 cm- Diagonal: 90 erect image- Finder scope: 6 x 30Angle of view: 7.0, actual- Mount Type: Vixen-style dovetail plate- Optical Tube Dimensions: 86.0 x 9.0 cm- Weight (OTA Only): 2.5 kgIn the Box:- A80Mf 80mm f/11 Achro Refractor Telescope (OTA Only)- 20mm Eyepiece- 6.3mm Eyepiece- 6x30 Finder scope- 90 Erect-Image Prism- Set of Mounting Rings- Dew Shield- Porta II Altazimuth Mount- Slow Motion Controls- Accessory Tray