... (Clear Aperture)90mmFocal Length, Focal Ratio900mm, F10Resolving Power in arc seconds1.28"Limiting Visual Stellar Magnitude (approx.)12.6magStandard ... )K-20mm, K-12mm, K-4mmTelescope MountingNG-mount, ready for use in azimutal and equatorial modeAccepts Eyepiece Barrel Ø31.7mm ... observation of many different objects.The new equatorial NG Mount with pole elevator cradle and the adequate tripod allow ...