Explore Scientific 20mm 52° Series Waterproof Eyepiece Explore Scientific
Explore Scientific 20mm 52° Series Waterproof Eyepiece Explore Scientific

Explore Scientific 20mm 52° Series Waterproof Eyepiece

  • Vendor
    Explore Scientific
    Sale price
    $119.99
    Regular price
    $119.99
    Unit price
    per 
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    Estimated Arrival: Between Oct 09 and Oct 11. *ETA to USA Only

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    Description

    Often considered the perfect mid-range focal length for most amateur telescopes, the 20mm on the ED127 at f7.5 produces a 1 degree true field of view. Perfect for the Messier Marathon, or running down the Herschel Catalog. The 20mm 52° Series is also a good selection for most binoviewers with its relatively small size and magnification range.

    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 and value versus a comparably priced Plossl.

    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.

     Specs

    Item Number EPWP5220–01
    Focal Length 20mm
    Length 71mm
    Width 43mm
    Weight 181.4 grams; 6.4 oz.
    Barrel Size/Type 1.25" O.D. / Double Taper
    Eye Relief 15mm
    Field Stop Diameter: 18.2mm
    Coatings: EMD (Enhanced Multi-Layer Deposition) on all lens-to-air surfaces
    Lens Elements/ Groups 5 Elements in 3 Groups; Edge Blackened
    Filter Thread Fits Standard 1.25-inch Dia. Thread in Filters (1.125-inches x 42 TPI)
    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

    Warranty

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

     


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