Explore Scientific 40mm 68 Degree Waterproof Eyepiece
Using advanced computer design, combinations of low dispersion and high refractive index optical glasses, and durable multilayer deposition coatings, Explore Scientific 62° 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 62° Series eyepieces are parfocal (meaning they focus at near the same point regardless of the focal length you select) and come with a removable 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.
|Field Stop Diameter:||45.5mm|
Free Shipping Everyday to Canada!
(Except to Yukon, Northwest Territories, Nunavut, and other areas deemed as "remote" by Canada Post or Purolator)
On orders above $100
Orders are processed: Monday – Friday from 8am – 3:30pm MT
(Public Holidays Excluded)
Order Confirmation: After placing an order, you will receive an order confirmation by e-mail. This means we’ve received your order in our system and have pre-authorized your credit card for the purchase. If your item is back-ordered or otherwise unavailable, we will void the pre-authorization charge and contact you to inform you by e-mail. If your item(s) are available for immediate shipment (within 7 business days unless noted longer on the product page), we will process the charges and submit the order for shipment.
Tracking Numbers will be sent to your email once your order has shipped.
In some cases, we may need to contact you before your order can be shipped. To ensure there is no delay, please respond to any email/phone call from our Customer Service team.
We proudly use the following Shipping Methods and will choose the best available in terms of price and delivery times at the time of shipment.
Price Guarantee Policy:
We want to ensure our customers get the products they need at the best possible price. If you find another online store that offers a lower price than us within one month of your purchase date, please let us know and we will refund your original payment for the difference.
To request your partial refund simply e-mail us a link to the same product on our competitors website within one month from the date of your order and we will process the credit accordingly.
Our 100% Price Guarantee has some limitations:
- You must purchase the item from our website before requesting your Price Match Guarantee
- Promotions such as rebates and buy one, get one free offers are not eligible
- The item must be in stock on the competitors website
- The competitor must be an online store, they may not have a retail location
- The website can not be a discounter or auction website (ie; eBay, overstock, etc..)
- The competitor must be an Authorized Retailer for the product in question
- The Price Match Guarantee includes the item price and the shipping charges, it excludes sales tax