Explore Scientific 25mm 100 Degree field waterproof 2" eyepiece

Manufactured by: Explore Scientific
Model: EPWP10025-01

$699.99

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Explore Scientific 25mm 100 Degree field waterproof 2" eyepiece, Argon Purged EP10025-01

The new 25mm Explore Scientific 100 degree field 2" eyepiece is O-ring sealed and argon-purged to be 100% waterproof. To insure a perfect seal, Explore Scientific tests every eyepiece in one meter of water for 30 minutes before shipping.

Internally sealing the eyepiece and purging it with inert, dry argon gas prevents internal fogging in the eyepiece when observing at sub-freezing temperatures. For observers in dusty climates, sealing keeps wind-blown dust and fine particulates from getting into the eyepiece body. For observers in very humid climates, sealing prevents the growth of fungus on the internal lens elements. For all observers, complete sealing maximizes the life of the internal optical coatings and makes the eyepiece easier to clean, as there is no risk of cleaning solution migrating from the top of the lens and seeping around edges to be trapped in between elements.

The 25mm Explore Scientific eyepiece has high contrast, comfortable eye relief, and full field sharpness - with well-controlled astigmatism, field curvature, and lateral color. Its optical system (using lenses of dense crown, light crown, dense flint, and lanthanum rare earth optical glasses) is designed for maximum field/medium power deep space use with telescopes having focal ratios down as low as f/4. It is exceptionally effective on nebulas with fast f/ratio reflectors, such as Dobsonians, as it gives both an immense field and a bright exit pupil (over 5.5mm with the typical f/4.5 Dob). Its very wide field also makes it convenient for moderate power lunar and globular cluster observing with Dobsonians, as you have much longer to observe before the planet drifts out of the field and the scope has to be repositioned than you do with a 60 degree or 70 degree (or even 82 degree) field eyepiece. In addition to Dobs, the new 25mm Explore Scientific Explore Scientific is marvelous for observing open clusters, nebulas, galaxy clusters, and globular clusters with any telescope capable of using a 2" eyepiece.

The 100 degree apparent field of this new 25mm Explore Scientific eyepiece is nearly 50% larger in area than an 82 degree field eyepiece. You could get a similar true field with a longer focal length (but narrower apparent field) conventional eyepiece, but the 25mm Explore Scientific Explore Scientific has the benefits of the higher power and darker sky backgrounds that are inherent in its shorter focal length. You can use the field of view calculator below to see just how much sky the Explore Scientific can reveal with your telescope.

There is a soft rolldown eyecup to shield your eye from ambient light (from a neighbor's security light, for example) and improve the image contrast.

The 25mm Explore Scientific fits 2" focusers only. A safety groove is machined into the 2" chrome barrel to engage your focuser thumbscrew. This helps prevent the eyepiece from falling should the thumbscrew accidentally loosen while observing.

Specifications

  • Field of view: 100 degree
  • Focal Length: 25mm
  • Barrel Size: 2"
  • Weight: 2.5 lbs.
  • Explore STAR Warranty

    In continuing our effort to be the best we can possibly be, Explore Scientific introduces the Explore STAR Warranty, an unprecedented program for complete customer satisfaction; exclusive Fully Transferrable Unlimited Lifetime Warranty;

    Anytime Free Service; and for Repurposing Product from our trade-up program. Now, every new Explore Scientific branded product is eligible for the Explore STAR Transferrable North America Unlimited Lifetime Product Warranty program. All previously purchased Explore Scientific products require a re-certification. Simply contact Customer Service to make arrangements.

    We take great pride in designing each of our products with the goal of providing you superior quality optical and mechanical astronomical equipment. In addition, we use high-quality parts and the latest assembly and quality control techniques to ensure the reliability and long life of our products.

    Our reputation rests on our steadfast pursuit of this policy in the astronomy arena for the amateur, for the professional and for the educational markets. At Explore Scientific, we are committed to investing in research that continually gives rise to new technologies for improving our products.

    When you purchase any product from Explore Scientific we encourage you to compare it, as we do, to competitive products for quality, performance, aesthetics and price. We believe that this process will enhance your appreciation of the product you select.

    Coverage Details

    ALL Explore Scientific Products: include Limited North America One Year Warranty. New products are eligible for extendable Explore STAR Transferrable North America Unlimited Lifetime Product Warranty when registered within the first 60 days. All previously purchased Explore Scientific products require a re-certification.

    Third-Party Products: Warranty is provided by Third Party Manufacturers and is limited to their coverage.

    Standard Explore Scientific North America Limited Warranty is ONE (1) year, however, when new product is registered within 60 days of purchase, it is covered under the Explore STAR Transferrable North America Unlimited Lifetime Product Warranty program. All Explore Scientific's warranties are limited to the original owner, unless said owner has registered the product with Explore Scientific and has successfully transferred the product registration to the new owner under the Explore STAR Transferrable North America Unlimited Lifetime Product Warranty program.

    (Original owner may include person receiving brand new product as a gift). Previously purchased product may receive the Lifetime Warranty by going through a re-certification process. Contact Customer Service to make arrangements for this opportunity.

    Anytime Free Service

    Anytime an Explore Scientific branded product with the Explore STAR warranty needs adjustments, cleaning, or collimation, we will do this service for free, provided that the product is registered. Here's how: You drop it off and pick it up, or provide round-trip shipping and we will provide our professional service at no charge!

    Repurposing: Our Exclusive Product Trade-Up Program

    As an owner of an Explore Scientific product, you may find it is time to grow in your exploration and you would like to trade up for a higher performance product. This program is for Explore Scientific products purchased from authorized North America dealers or direct from us. If and when you are ready to trade-up, contact our Customer Service Team and we will get this process underway.

    Register and transfer warranty at: http://explorescientific.com/customerservice/productregistration.php

    For full details, please refer to http://explorescientific.com/about/explorestar.html.

    If you discover that you have a problem with any Explore Scientific branded product, please contact Explore Scientific Customer Service at 1-866-252-3811. As long as the product is registered, your Explore Scientific branded product is covered.

    We at Explore Scientific offer our best wishes for many years of enjoyable stargazing


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