Featuring an exceptionally long 15.9 mm of eye relief, this Explore Scientific 4.5 mm Argon-Purged Waterproof 82 Degree LER Series Eyepiece provides a more comfortable observing experience for all viewers. An eyepiece with long eye relief is particularly advantageous for those who wear eyeglasses as it gives them access to the full field of view.
This eyepiece's 4.5 mm focal length is perfect for observing objects that would benefit from high magnifications such as the Moon, planets, and binary stars. When atmospheric conditions are near ideal, this eyepiece can reveal planetary details that are truly stunning. The 4.5 mm size is also great for detailed examinations of nebulae and other deep sky object structures.
Edge-blackened optics consisting of high refractive index low-dispersion glass allows this multi-element eyepiece to achieve better light transmission. Full multi-coatings of durable enhanced multi-layer deposition (EMD) coatings can be found on each lens. These elements combine to optimize your telescope's potential for capturing the celestial marvels with which you are most fascinated in sharp contrast, resolution, and detail.
Like other Explore Scientific 82º series eyepieces, this eyepiece boasts an ultra-wide 82º apparent field of view that gives users an immersive cosmos observing experience while also facilitating eyepiece relaxation naturally. An apparent field of view this wide allows your eyes to relax and take in your surroundings, making it much easier to observe for extended stretches. As you spend more time at the eyepiece, details will begin to emerge that may not have revealed themselves at first glance. The broad field of view also promotes the use of averted vision, which involves looking slightly to the side of a target object rather than directly at it. This is especially helpful when observing faint objects, because using averted vision puts the image on a part of your eye that is more sensitive to light, allowing you to see fainter images.
All Explore Scientific waterproof eyepieces are gas-purged and O-ring sealed to create a waterproof environment that is impervious to internal fogging and prevents contaminants like fungus and dust from entering the ocular housing. This design makes cleaning the eyepiece a breeze.