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Explore Scientific 68° Series 20mm Waterproof Eyepiece EPWP6820-01

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Explore Scientific 68° Series 20mm Waterproof Eyepiece EPWP6820-01

Impervious to internal fogging and contaminants Item Number:  EPWP6820-01 Focal length: 20mm Weight: 8.7oz Free Shipping!

Price 219.99 SKU EPWP6820-01 BARCODE 812257010530 Explore Scientific 68° Series 20mm Waterproof Eyepiece EPWP6820-01

Features and Benefits

  • Superior flat field characteristics
  • High contrast
  • Impervious to internal fogging and contaminants
  • Durable multilayer deposition coatings
  • Limited Warranty is one year, which converts to the Explore STAR Transferable Extended Life of the Product Warranty when product is registered within 60 days of purchase 

Description

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 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

Specifications

Item Number EPWP6820–01
Focal Length 20mm
Length 69.6mm
Width 50.3mm
Weight 8.7oz; 247g
Barrel Size 1.25-inch
Eye Relief 15.3mm
Field Stop Diameter 22.8mm



Shipping This item ships to
Delivery Estimated between and . Will usually ship within 1 business day. Except Saturday and Sunday

   

Please allow 10 days for your order to arrive. We source products from all over the world to bring you epic offers and the lowest prices. This means sometimes you have to wait a little longer to get your order but it's always worth it!

Returns are easy, simply contact us for a returns number and send your item to our returns center for fast processing. We'll get you a replacement or refund in a snap!

Here are 4 more great reasons to buy from us:

Returns are easy, simply contact us for a returns number and send your item to our returns centre for fast processing. We'll get you a replacement or refund in a snap!

In the unlikely event that you find your item cheaper at another online store, just let us know and we'll beat the competitor's pricing hands-down.

We insist that you love everything you buy from us. If you're unhappy for any reason whatsoever, just let us know and we'll bend over backwards to make things right again.

Ordering from CoreScientifics is 100% safe and secure so you can rest easy. Your personal details are never shared, sold or rented to anyone either.

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Description

Explore Scientific 68° Series 20mm Waterproof Eyepiece EPWP6820-01

Impervious to internal fogging and contaminants Item Number:  EPWP6820-01 Focal length: 20mm Weight: 8.7oz Free Shipping!

Price 219.99 SKU EPWP6820-01 BARCODE 812257010530 Explore Scientific 68° Series 20mm Waterproof Eyepiece EPWP6820-01

Features and Benefits

  • Superior flat field characteristics
  • High contrast
  • Impervious to internal fogging and contaminants
  • Durable multilayer deposition coatings
  • Limited Warranty is one year, which converts to the Explore STAR Transferable Extended Life of the Product Warranty when product is registered within 60 days of purchase 

Description

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 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

Specifications

Item Number EPWP6820–01
Focal Length 20mm
Length 69.6mm
Width 50.3mm
Weight 8.7oz; 247g
Barrel Size 1.25-inch
Eye Relief 15.3mm
Field Stop Diameter 22.8mm



Estimated Arrival

Shipping This item ships to
Delivery Estimated between and . Will usually ship within 1 business day. Except Saturday and Sunday

Shipping and Delivery

   

Please allow 10 days for your order to arrive. We source products from all over the world to bring you epic offers and the lowest prices. This means sometimes you have to wait a little longer to get your order but it's always worth it!

Returns are easy, simply contact us for a returns number and send your item to our returns center for fast processing. We'll get you a replacement or refund in a snap!

Why Buy From Us

Here are 4 more great reasons to buy from us:

Returns are easy, simply contact us for a returns number and send your item to our returns centre for fast processing. We'll get you a replacement or refund in a snap!

In the unlikely event that you find your item cheaper at another online store, just let us know and we'll beat the competitor's pricing hands-down.

We insist that you love everything you buy from us. If you're unhappy for any reason whatsoever, just let us know and we'll bend over backwards to make things right again.

Ordering from CoreScientifics is 100% safe and secure so you can rest easy. Your personal details are never shared, sold or rented to anyone either.

Reviews

Explore Scientific 68° Series 20mm Waterproof Eyepiece EPWP6820-01

Explore Scientific 68° Series 20mm Waterproof Eyepiece EPWP6820-01

$219.99
Add to wishlist
Explore Scientific 68° Series 20mm Waterproof Eyepiece EPWP6820-01

Explore Scientific 68° Series 20mm Waterproof Eyepiece EPWP6820-01

Your Price:
$219.99
3 visitors right now
3 visitors have this item in their cart right now
3 % of people buy 2 or more

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