Main features: 1. Fully multilayer coated optics ensure that each glass surface has multiple layers of coating to achieve better image quality. 2. Standard PloSSL eyepiece structure: 2 sets of 4piece optical structures 3. The edge of the lens is matte black to prevent interference from stray light 4. The all metal mirror structure has a delicate texture and fine workmanship. 6. Safety bottom cutting 'milling into the objective lens to prevent the eyepiece from falling out of the focusing device. 7. Precautions for glasses fitting: Plossl25mm and longer focal length eyepieces are good choices for eyeglass wearers, but for shorter focal lengths, the SV190 series provides greater eye comfort and is therefore more suitable. Specifications: 1. Brand: SVBONY 2. Model: SV207 3. Eyepiece type: Super Plossl 4. Focal length: 25mm 5. Field of view: 50 degrees 6. Exit pupil: 19.5mm 7. Field aperture diameter: 20.4mm 8. Camera set: 2 sets/4PCS 9. Lens coating: FMC 10. Lens side coating: Matte ink 11. Material: Metal 12. Thread size: M28.5 * 0.6 13. Anti slip cover: Yes 14. Eye mask type: rubber 15. Net weight: 130g/4.59oz 16. Size: Ø 48.0x57mm The package includes: SV207 SPL 25mm eyepiece 2PCS dust cover