Explore Scientific 40mm 52° Series Waterproof Eyepiece Explore Scientific
Explore Scientific 40mm 52° Series Waterproof Eyepiece Explore Scientific

Explore Scientific 40mm 52° Series Waterproof Eyepiece

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    Explore Scientific
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    Estimated Arrival: Between Feb 29 and Mar 02. *ETA to USA Only

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    Explore Scientific 40mm 52° Series Waterproof Eyepiece - Overview


    The longest focal length in the 52° Series with the longest eye relief, the 40mm is also the only 2.0-inch O.D. eyepiece in this series. Explore Scientific now has three 40mm eyepieces in its collection, the other two are the 40mm 62° Series, and the 40mm 68° Series. At this focal length, this eyepiece is generally reserved for deep sky observers who challenge themselves to observe near the faintest observable limit of their telescopes. The huge true field of view is perfect for deep sky objects like the Andromeda Galaxy, the Rosette Nebula, as well as large star clusters, and comets.

    Explore Scientific Waterproof Eyepieces - Comfort, Quality, Value. The Explore Scientific 52° Series eyepieces are excellent flat-field multi-element oculars that can transform your visual astronomy experience. With an apparent field of view of 52 degrees, these eyepieces offer incredible value in a very nice eyepiece. Expect exceptional quality, eye relief and value versus a comparably priced Plossol.

    Another great benefit of these eyepieces is the excellent contrast and ease with which you can gaze, not directly at an object, but slightly to either side. This skill, called using averted vision, 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.


    Item Number EPWP5240–01
    Focal Length 40mm
    Length 96,6mm
    Width 61.8mm
    Weight 385.5 grams; 13.6 oz.
    Barrel Size/Type 2.0" O.D. / Double Taper
    Eye Relief 27.1mm
    Field Stop Diameter 36.3mm
    Coatings EMD (Enhanced Multi-Layer Deposition) on all lens-to-air surfaces
    Lens Elements/ Groups 4 Elements in 2 Groups; Edge Blackened
    Filter Thread Fits Standard 2.0-inch Dia. Thread in Filters (48mm x 0.75mm)
    Waterproof O-Ring Sealed Argon Gas Purged; Tested Under 1 Meter of Water for 30 Minutes
    Eyecup Removable Flip-Down Style Soft Silicone Rubber
    Lens Caps Slide-on Top and Bottom
    Materials Optical Glass; Aluminum; Steel; Silicone Rubber
    Markings Laser Engraved: Focal Length; Series; Serial Number; Brand


    Limited USA One Year Warranty when product is registered within 60 days of purchase.

    Looking for the perfect eyepiece for your astronomy hobby? Look no further than the Explore Scientific 40mm 52° Series Waterproof Eyepiece! This eyepiece is designed to provide a clear view of the night sky, with a wide field of view and high-quality optics.

    The 40mm focal length provides a wide field of view, making it perfect for viewing large objects such as the moon and planets, as well as deep-sky objects. The 52° field of view allows you to take in more of the sky at once, giving you a more immersive viewing experience.

    The Explore Scientific 40mm 52° Series Waterproof Eyepiece is also designed to be waterproof, so you can use it in any weather conditions without worrying about damage. This makes it perfect for use in damp or foggy conditions, or even for viewing from a boat or near the water.


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