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Explore Scientific 52° Series 25mm Focal Length Waterproof Eyepiece

Explore Scientific 52° Series 25mm Focal Length Waterproof Eyepiece

Regular price $129.99
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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.

Video

Specs

Item Number EPWP5225–01
Focal Length 25mm
Length 67.7mm
Weight 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. Click Here to register.

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      30-Day Return Policy: no postage, no restocking fee, no worries!

      Astraeus Optics will cover shipping fees as well as any restocking fee that the manufacturer enforces.


      To be eligible for a return, your item must be unused and in the same condition that you received it. It must also be in the original packaging. Custom made items are not eligible for returns or refunds.

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      • Any item not in its original condition, is damaged or missing parts for reasons not due to our error.
      • Any item that is returned more than 30 days after delivery


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      We will credit you for the total purchase price upon the receipt of your return. Products returned under this policy are eligible for a refund to the original method of payment.


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      We only replace items if they are defective or damaged. If you need to exchange it for the same item, send us an email at support@astraeusoptics.com


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