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Explore Scientific 68 Degree Series Argon-Purged Waterproof Telescope Eyepieces

Item# EXP018
 
5.0

(4 Ratings)

Customer Q & A
1. Focal Length:

Price:

$139.99

List Price: $311.99
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Details & Dimensions
Guarantee & Returns
  • Fully Waterproof and Argon Purged
  • 68 Degree Apparent Field of View
  • All internal surfaces/edges are flat black
  • EMD Enhanced Multilayer Deposition Coatings
  • Folding Rubber Eyecup

Description

  • 16mm 1.25" 11.9mm Eye Relief 6 Elements in 4 Groups 5.5 oz.
  • 20mm 1.25" 15.3mm Eye Relief 6 Elements in 4 Groups 8.7 oz.
  • 24mm 1.25" 18.4mm Eye Relief 6 Elements in 4 Groups 11.6 oz.
  • 28mm 2.00" 21.6mm Eye Relief 6 Elements in 4 Groups 1 lb.
  • 34mm 2.00" 26.4mm Eye Relief 6 Elements in 4 Groups 1 lb. 8 oz.
  • 40mm 2.00" 31.0mm Eye Relief 6 Elements in 4 Groups 2 lb. 3 oz.

 

 

All 68° Series eyepieces are fully EMD (Enhanced Multi-Layer Deposition) coated and edge-blackened to produce superior contrast.


Through computer-optimized design, a careful selection of optical glasses, and enhanced multi-layer deposition coatings, the Explore Scientific 68° Series™ eyepieces produce long eye-relief and ensure high image-correction, a flat field, and high contrast across the entire image field. An excellent choice for those who make extended visual studies of detail with subtle variations of brightness, and for those who must wear glasses while observing.


With the introduction of the 68° Series we are pleased to make two important improvements in eyepiece manufacture, the first being 15 layer Enhanced Multi-layer Deposition (EMD™) coatings on all glass-to-air surfaces to gain maximum contrast, and waterproofing the eyepiece with the use of Argon gas purging instead of standard Nitrogen gas. Although Nitrogen is a fine choice that will last for many years, Argon is a larger molecule that maintains its protective properties over a wider range of temperatures, and is even more resistant to diffusion thereby further extending the protective waterproof environment of the eyepiece body.

 

Each eyepiece is meticulously assembled into precision machined metal lens barrels that maintain the perfect alignment of the optical train for years of rugged use in the field.The 82° Series eyepieces come with a twist-up rubber eye-guard that raise to the desired height 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.

 


To keep internal reflections to a minimum, all internal surfaces of the eyepiece barrel are flat black, as well as the edges of the lenses themselves to minimize the scattering of light within the lenses themselves.

 

In today's modern telescope industry there are many fine companies to choose from manufacturing top quality eyepieces. We invite direct side-by-side comparison with any other eyepiece of similar design, and we back our eyepieces with our exclusive Five Year Limited Warranty.* We think that you will find Explore Scientific eyepieces rank among the finest obtainable and represent an outstanding value.

 


Limited Warranty is one year, extended to five years when product is registered within 60 days of purchase.

 

Developing our new eyepieces we wanted to take a fresh perspective and address several points. Our goal was to produce an ultra-wide angle design that provides pride of ownership at a great value:

Focus on Value - We invite direct comparison to any eyepieces on the market in their category.

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

Creating an Identity - We look at purchasing fine optical equipment as an investment, and it should be treated as such. With a unique serial number on each eyepiece we can track when a product was made, and the owner can document their equipment for insurance and warranty purposes.

Providing Peace of Mind - Explore Scientific stands behind our products with a free 5 Year Transferrable Limited Warranty upon registration of the product. Want to trade or sell your eyepiece? You’ll get more value if its remaining warranty can be transferred to the new owner.

Shipping Restrictions:
Only ships in contiguous USA.

Dimensions & Specifications

Brand

Explore Scientific

Options

Focal Length: 16mm - 1.25 Inch, 20mm - 1.25 Inch, 24mm - 1.25 Inch

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The Perfect Accessories

Customer Reviews

REVIEW SNAPSHOT®

by PowerReviews
Explore Scientific 68 Degree Series Argon-Purged Waterproof Telescope Eyepieces
 
5.0

(based on 4 reviews)

Ratings Distribution

  • 5 Stars

     

    (4)

  • 4 Stars

     

    (0)

  • 3 Stars

     

    (0)

  • 2 Stars

     

    (0)

  • 1 Stars

     

    (0)

100%

of respondents would recommend this to a friend.

Pros

  • Quality lenses (4)
  • Easy to use (3)

Cons

    Best Uses

    • Astronomy (4)
      • Reviewer Profile:
      • Casual/ recreational (4)
      • Was this a gift?:
      • No (4)

    Reviewed by 4 customers

    Sort by

    Displaying reviews 1-4

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    5.0

    40 mm explore 68 degree

    By cjw

    from Oregon

    About Me Casual/ Recreational

    Verified Reviewer

    Pros

    • Easy to Use
    • Quality Lenses
    • Strong Construction

    Cons

    • Heavy

    Best Uses

    • Astronomy

    Comments about Explore Scientific 68 Degree Series Argon-Purged Waterproof Telescope Eyepieces:

    Great eyepiece. Clear to about 95% out to the edge. And the last 5% is still pretty good. For the money very, very good. Very wide. Build seems like it will last for a long time and waterproof too also helpful. Recommended.

    • Was this a gift?:
    • No
     
    5.0

    Great, wide field eyepiece

    By Douglas

    from FORT COLLINS,CO

    About Me Casual/ Recreational

    Verified Buyer

    Pros

    • Accurate
    • Easy to Use
    • Quality Lenses

    Cons

      Best Uses

      • Astronomy

      Comments about Explore Scientific 68 Degree Series Argon-Purged Waterproof Telescope Eyepieces:

      Works great in my Celestron 8SE as my "finder" eyepiece. Flat field, sharp to edge, WIDE!

      • Was this a gift?:
      • No
       
      5.0

      Excellent 68 degree eyepiece: 34mm

      By Jason

      from ABILENE,TX

      About Me Casual/ Recreational

      Verified Buyer

      Pros

      • Quality Lenses
      • Strong Construction

      Cons

        Best Uses

        • Astronomy

        Comments about Explore Scientific 68 Degree Series Argon-Purged Waterproof Telescope Eyepieces:

        I use this as a finder eyepiece when looking for DSO's and for looking at larger objects like the Beehive cluster, Pleiades, etc. It is the same quality as the 82 degree series, just with smaller AFOV. In my scope, the 34mm produces 35X which gives a true field of nearly 2 degrees. The view is very good all of the way to the edge. This is definitely the best 68 degree eyepiece in its price range. highly recommended!

        • Was this a gift?:
        • No

        (0 of 2 customers found this review helpful)

         
        5.0

        great service

        By Robert

        from Hagerstown, Md

        About Me Casual/ Recreational

        Verified Buyer

        Pros

        • Accurate
        • Easy to Use
        • Lightweight
        • Quality Lenses

        Cons

          Best Uses

          • Astronomy

          Comments about Explore Scientific 68 Degree Series Argon-Purged Waterproof Telescope Eyepieces:

          Package came sooner than tought, thanks

          • Was this a gift?:
          • No

          Displaying reviews 1-4

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