New High Quality ES Explore Scientific 1.25″ 68-deg Series Argon-Purged Waterproof Eyepiece 24mm Fast Shipping

New High Quality ES Explore Scientific 1 25 68 deg Series Argon Purged Waterproof Eyepiece 24mm
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New High Quality ES Explore Scientific 1 25 68 deg Series Argon Purged Waterproof Eyepiece 24mm
60 % of buyers enjoyed this product!
Availability: in stock
Price:  US $175.00 / piece


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Using advanced computer design, combinations of low dispersion and high refractive index optical glasses, and durable multilayer deposition coatings, Explore Scientific 68 Series Argon-Purged Waterproof extreme wide field eyepieces are optimized to produce high contrast, high resolution, and superior flat field characteristics. The visual effect of these eyepieces with their long eye-relief and their 68 apparent field is truly a full-immersion experience. The 68 Series eyepieces come with a removeable and foldable soft silicone rubber eyecup for the comfort of the observer, and as experienced astronomers know, eye comfort is critical when trying to observe at the visual limits of the telescope.

Protection from the Outdoors – By making the eyepiece body Argon-purged, the waterproof eyepiece internal elements will remain as pristine as the day they were assembled.

Argon atoms are larger than that of Nitrogen and therefore they are less likely to leak or diffuse their way through the seals over the life of the eyepiece. The atomic radius of Argon is larger than Nitrogen by 0.13 angstroms and has a larger atomic volume by 11.2 cubic centimeters/molecule. Argon also has superior inertness vs Nitrogen (i.e. forming few or no chemical compounds with other elements) that prevents adverse reactions with eyepiece components and therefore extends the longevity of the internal components, and also prevents chemical reactions with other elemental contaminants that may be introduced through a weakened seal. And, finally because Argon is less conductive of heat than Nitrogen, Argon cools slower thereby buffering the effects of rapid temperature changes of the optics.

The sealed, dry environment is impervious to internal fogging and contaminants such as fungus growing in between the lens elements. Our waterproof eyepiece is easier to clean, and there is no risk of cleaning solution migrating from the top of the lens and seeping around edges to be trapped in between elements. To insure a perfect seal we test every eyepiece in one meter of water for 30 minutes.

Eyepiece Series Explore Scientific 68 Argon-Purged Waterproof Series
Focal Length 24mm
Barrel Size 1.25″ (31.7mm)
Apparent Field of View (Mfg Specified) 68
Filter Threads Standard 1.25″ Filter Thread (M28.5 x 0.6)
Eye Relief 18.4mm
Coatings EMD (Enhanced Multilayer Deposition) Coatings
Lens Elements 6
Lens Groups 4
Blackend Lens Edges Yes
Barrel Type Tapered barrel
Height (With Eyeguard Extended) 75.6mm
Rubber Eye Guard Rubber Folding Type
Weight 11.6oz; 329g

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Shipping Company Shipping Cost Estimated Delivery Time
DHL 3 - 7 days
UPS Expedited 3 - 7 days
EMS 5 - 14 days
Post Air Mail Free Shipping 15 - 45 days
Return Policy If the product you receive is not as described or low quality, the seller promises that you may return it before order completion (when you click "Confirm Order Received" or exceed confirmation timeframe) and receive a full refund. The return shipping fee will be paid by you. Or, you can choose to keep the product and agree the refund amount directly with the seller.

N.B.: If the seller provides the "Longer Protection" service on this product, you may ask for refund up to 15 days after order completion.
Seller Service On-time DeliveryIf you do not receive your purchase within 60 days, you can ask for a full refund before order completion (when you click "Confirm Order Received" or exceed confirmation timeframe).
Price:  US $175.00 / piece
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