The Moon filter is a combination of green and neutral density filter designed to enhance contrast and reduce overall image brightness for viewing the Moon. The Moon Filter will increase definition and resolution, reduce irradiation and lessen eye fatigue.
Made of high quality, solid plane parallel glass with excellent homogeneity. They are anti-reflection coated to prevent glaring and ghosting. Threaded to fit GSO and most other manufacturers 1.25" eyepieces and offers a full 26mm clear aperture.
||M28.5 x 0.6