Explore Scientific 40mm 52° Series Waterproof Eyepiece

Explore Scientific 40mm 52° Series Waterproof Eyepiece

by Explore Scientific

$ 159.99

SKU EPWP5240-01

BARCODE 811803030084

Quantity

Focal Length: 40MM

3MM 4.5MM 6.5MM 10MM 15MM 20MM 25MM 30MM 40MM

Description

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.

Video

Specs

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

Warranty

Limited USA One Year Warranty when product is registered within 60 days of purchase. Click Here to register.

Extras

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Explore Scientific 40mm 52° Series Waterproof Eyepiece