Aperture: 102mm(4”) Focal Length: 600mm.(f/5.9) ,900mm(f/8.9) Diagonal Prisms: 1.25” 45°Correct Image Prims Diagonal Finderscope: 9X50 Liminting Magnitudel: 11.8 Eyepiece: 1.25” PL6.5mm PL25mm Most Height: 145cm Tripod: Telescopic Steel tripod