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Explore Scientific 68° Argon Purged Eyepiece 40mm 2"

£266.00

Quick Overview

Introducing the Explore Scientific 68° Ar purged Eyepiece 40mm, a superb low power 68-degree field ocular. Built to Explore Scientific's high standards and featuring an Argon-purged waterproof interior, this 2-inch eyepiece should be high on the list for those wishing to expand their eyepiece collection.
0218640
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Details

Introducing the Explore Scientific 68° Ar purged Eyepiece 40mm, a superb low power 68-degree field ocular. Built to Explore Scientific's high standards and featuring an Argon-purged waterproof interior, this 2-inch eyepiece should be high on the list for those wishing to expand their eyepiece collection.

The Explore Scientific 68° Series Eyepieces were designed for those who prefer longer eye relief but still want to enjoy a field of view that is wider than a classic Plossl or Orthoscopic style eyepiece. If you wear eyeglasses and either want or need to keep them on while observing, the extra long eye relief built into the 68° models will allow you to do that and still observe comfortably. As you can see from the chart shown above, the eye relief in this series starts at almost 12mm on the 16mm model and increases quickly until it reaches a maximum of 31mm on the 40mm model. There are four Explore Scientific 68° eyepieces…the 24mm, 28mm, 34mm, and 40mm…that sport an eye relief of over 18mm, which is perfect for eyeglass wearers. If you wish to increase the magnification of these eyepieces while still maintaining their superb eye relief, use them with the appropriate Explore Scientific Focal Extender, which comes in both 1.25" and 2" barrel sizes.

Of course, you do not have to wear eyeglasses to appreciate comfortable eye relief, or the quality that lives in each Explore Scientific 68° eyepiece. From the rubber grip and folding eyecup to the enhanced EMD coatings for superb contrast, we think you'll agree that these eyepieces are a perfect solution for dropping the power down on your telescope, which will increase the exit pupil size and allow you to see the faintest objects that your telescope is capable of.



Explore Scientific 68° Eyepiece Highlights



Optimized Optical Design Explore 68° Series Eyepieces are optimized through each design, fabrication, and testing process to produce high contrast, high resolution images.



Durable Coatings & Finishing Touches Each element in your Explore Scientific 68° eyepiece is fully multi-coated, resulting in bright, sharp images, and every element has blackened edges to reduce internal reflections and increase contrast.



Waterproof, Fog-Proof Housing The internal optics of all 68° Series eyepieces are housed in a gas-purged, waterproof barrel that keeps them as pristine as the day they were manufactured. Cleaning is much easier, and there is no need to worry about water or fluid becoming trapped in between elements due to rain, spills, heavy dew, or getting over-enthusiastic with lens cleaning fluid.



Tapered Barrel for Extra Security The insert barrel of each eyepiece is double-tapered to allow smooth insertion to, and removal from, a telescope's eyepiece holder or diagonal, however the wide dimension of the taper helps prevent the eyepiece from falling out of the telescope should the set-screw holding it in place become loose. Barrels are threaded to accept standard screw-on filters.

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