[Appearance] The hood and hood cap lash were re-covered and cleaned (without disassembly) by the manufacturer in 2009, so the hood can be stored smoothly. Format: 2 elements in 2 groups, SKY-type flowlight apochromatic Effective aperture: 90mm, multi hard coating on all surfaces Focal length : 500mm Aperture Ratio ：1:5.6 Resolution ：1.29" Extreme magnitude ：11.5 magnitude Light gathering power ：165x Optical Tube Diameter ：95mm Overall length of optical tube ：560mm Weight ：3.2kg (with 6x30 finder) [Optics] Haze : No Fungus : No Scratch : No Separation : No Dust : Very Little No problem in shooting Please check the detailed condition from the photos. [Function] It works properly. [Bundle item] -handling instructions -Quality Warranty -Product Repair Sheet, etc. Everything you see in the photos.