1.Effective Apture:50mm 2.Focal Length:600mm(F4) 3.Finderscope:5X24mm 4.Eyepiece:H6mm H20mm Aperture:50mmFocal length:600mm,f/12Finder scope:5*24Hybrid diagonal:90Metai tripod with slow motion controlrod for easy vertical micro adjustment.Most height:125cmAccessory trayStandard 0.965" accessories include:Eye piece:H6mm,H20mm3X Barlow lens F60050M Astronomical Telescopes 50mm