Specification:
1.Brand: --2.Focal Length: 4Mm3.Fully Coating Group On Each Lens Surface To Maximize Light Transmission And Contrast4.4-Element Plossl Design Has A Approx 48 Degree Afov.5.Full Metal Soft Rubber Eyeguard6.The Inside Of The Adapter Is Fully Threaded To Minimize Reflections7.Structure Of The Optical System: Plossl Optical Design8.Thread Pitch: M28.5*0.6 (For Standard 1.25 Inch Filters)9.Weight: 63G /2.19Oz10.Height: 45Mm /1.77InchApply: Watch The Scenery Bright Celestial Observations Nebula ANd So On
