D130F650 parabolic primary mirror with a 130mm aperture and 650mm focal length, devised for optimal light gathering and clarity in astronomical observations. Includes a 35mm secondary mirror, perfect for enhancing your homemade telescope's performance and image . Features a durable aluminum-coated lens surface with a protective film to prevent scratches and ensure longevity during use. Equipped with a center mark for easy optical calibration using either an eyepiece or machine collimator, simplifying setup for DIY enthusiasts. Ideal for astronomy hobbyists looking to build their own telescopes or upgrade existing setups with components.