SVBONY 66 Degree Ultra Wide Angle Telescope Eyepiece Set 1.25 inch | 6mm, 9mm, 15mm, 20mm Focal Lengths, Fully Multi Coated Optics

• 66°wide angle eyepiecd; 66 degree AFOV perfects for broad field lunar observations; medium sized star clusters; wide range of cloudy nebulas and deep sky targets with extra sharpness
• Multiple magnification telescope eyepiece kit; 6/9/15/20mm focal length; high power and medium eyepiece fits for viewing surface and potholes details on the moon; the planetary; lunar; double stars; nebulas and deep sky
• FMC coating; improves light transmission; provides brighter images; which is especially important when observing faint objects; FMC eyepiece enhances contrast and color fidelity of observed images; sees celestial objects more clearly
• Edge blackened optics eyepiece; internally blackened to eliminate light scattering; minimize internal reflection and maximize contrast
• 1.25 inch eyepiece; suitable for 1.25” telescopes; mirror diagonal; barlow lens and other astronomical accessories; standard 1.25” filter thread; can be connected to the filter; helpful for obtaining contrasting planetary images
• Foldable eyecup; the telescope eyepiece set can fold down the rubber eye cup and more fit the glasses wearer; getting close to lens and see easily
• Durable and portable; 2 dust proof for every eyepiece; and a extra rubber eye cup that can prevent scratching of optic; the tube of eyepiece made of aluminium can be used for long time

• Select Eyepiece Focal Length — Choose the eyepiece focal length (6mm, 9mm, 15mm, or 20mm) based on your desired magnification. Remember, magnification = telescope focal length / eyepiece focal length. Shorter focal lengths yield higher magnification.
• Insert into Telescope Focuser — Gently slide the 1.25-inch barrel of the selected eyepiece into your telescope's focuser tube. Ensure it is securely seated, but do not overtighten.
• Focus and Adjust Eyeguard — Look through the eyepiece and adjust your telescope's focuser until the image is sharp. Fold the rubber eyeguard up or down to suit your viewing comfort, especially if you wear eyeglasses.
• Attach Filters (Optional) — If using a 1.25-inch filter (e.g., for planetary contrast or light pollution), screw it onto the threads at the base of the eyepiece before inserting it into the focuser.

Typical situations where SVBONY 66 Degree Ultra Wide Angle Telescope Eyepiece Set 1.25 inch | 6mm helps — illustrative scenarios, not customer reviews.