Specifications:

• Only for 0.965inch/24.5mm Telescope Eyepiece Set.Multi-coated.Suitable for 0.965inch/24.5mm telescope eyepiece filters.The lowest magnification being the H20 eyepiece, the second largest magnification being the H12.5 eyepiece, and the highest magnification being the SR4 eyepiece.
• Support all types of telescopes, reflector, refractor, to observe the star nebula cloudy cluster, moon, planet and deep sky, perfect for astronomy exploration.Wide viewing field with extra sharpness,35 Degree Field of View.
• Material：Optical Glass + Metal;Focal Length：20 mm(0.79 inch)/4mm(0.15 inch)/12.5 mm(0.49 inch);Eyepiece Port：24.5 mm/0.965 inch;H20mm Eyepiece Size：4.7*2.8 cm/1.85*1.10 inch;SR4mm Eyepiece Size：3.7*2.8 cm/1.46*1.10 inch;H12.5mm Eyepiece Size：4*2.7 cm/1.57*1.06 inch.
• Note: If you start using the highest magnification SR4mm eyepiece, the image may appear darker. This is normal because the eyepiece has a high magnification but a smaller field of view. When lighting conditions are poor, the image may appear darker due to the higher magnification.
• Instructions for using the eyepieces: Start with the lowest magnification eyepiece, the H20 eyepiece. If the image is unclear at a distance, switch to the H12.5 eyepiece for higher magnification. If the image is still unclear at a distance with the H12.5 eyepiece, you can switch to the highest magnification SR4 eyepiece.

3Pcs/Set Universal 0.965inch/24.5mm Telescope Eyepiece Set H20mm H12.5mm SR4mm for Astronomy Photography Accessory Kits