Explore Scientific 25mm 52° Series Waterproof Eyepiece Explore Scientific
Explore Scientific 25mm 52° Series Waterproof Eyepiece Explore Scientific

Explore Scientific 25mm 52° Series Waterproof Eyepiece

  • Vendor
    Explore Scientific
    Sale price
    $129.99
    Regular price
    $129.99
    Unit price
    per 
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    Description

    Long considered the “standard” eyepiece that is often supplied with telescopes that are sold by various suppliers, the 25mm focal length category is perhaps the most used eyepiece in the world. Like the 20mm, these eyepieces are great for binoviewer devices, and the 25mm is probably the longest focal length of the mid-power range eyepieces before you get into longer focal lengths.

    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 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 EPWP5225–01
    Focal Length 25mm
    Length 67.7mm
    Width 43mm
    Weight 181.4 grams; 6.4 oz.
    Barrel Size/Type 1.25" O.D. / Double Taper
    Eye Relief 16.4mm
    Field Stop Diameter 18.2mm
    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 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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