Explore Scientific 2" 68&
Ships by Next Business Day
Contiguous US Customers:
All items we sell ship for free within the Contiguous US. Shipping will be via the cheapest shipping method which will vary depending on the items in your order. During checkout, you may also be shown other optional faster shipping choices.
US Customers in Hawaii and Alaska:
Free shipping applies to almost all products. A few large telescopes and mounts are excluded from this free shipping offer. For these items, please contact us to obtain a shipping quote before you check out using the online shopping cart.
International Customers:
Free shipping does not apply to international orders. During check-out, you will be presented with several shipping choices and costs. However, the export of some items may be restricted outside the US due to size or manufacturer restrictions.
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, Explore Scientific has made 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. 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.
Explore Scientific's eyepieces are backed with their exclusive Explore STAR Transferrable Extended Life of the Product Warranty. Limited Warranty is one year, which converts to the Explore STAR Transferrable Extended Life of the Product Warranty when product is registered within 60 days of purchase. We think that you will find Explore Scientific eyepieces rank among the finest obtainable and represent an outstanding value.
| Free Shipping Graphic | Free US Shipping |
|---|---|
| Eyepiece Series | Explore Scientific 68° Argon-Purged Waterproof Series |
| Focal Length | 40mm |
| Barrel Size | 2" (50.8mm) |
| Apparent Field of View (Mfg Specified) | 68° |
| Eye Relief (Designed) | 31mm |
| Filter Threads | Standard 2" Filter Thread (M48 x 0.75) |
| Coatings | EMD (Enhanced Multilayer Deposition) Coatings |
| Lens Elements | 6 |
| Lens Groups | 4 |
| Blackened Lens Edges | Yes |
| Barrel Type | Tapered barrel |
| Protective Plastic Storage Container | Yes - Free Agena Eyepiece Container |
| Protective Plastic Storage Container Size | Agena 85x120mm |
| Optical Design | 6 Elements; Combination of: Dense Crown, Light Crown, Dense Flint, and Lanthanum Optical Glasses |
| End Caps | 2 |
| Parfocal | Yes |
| Rubber Eye Guard | Rubber Folding Type |
| Warranty | One Year Limited Warranty; Extendable to Five Years |
| Weight | 2lb - 3oz |
| Country of Manufacture | China |
| Misc. Information | Body: Anodized Black Aluminum; Laser-Etched Description and Serial Number; Rubber Grip: Internally O-Ring Sealed and Argon Purged Barrel: Stainless-Steel, Double Taper, Accepts Standard Filters |
| Hide Found a better Shipped Price on Frontend? | No |
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, Explore Scientific has made 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. 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.
Explore Scientific's eyepieces are backed with their exclusive Explore STAR Transferrable Extended Life of the Product Warranty. Limited Warranty is one year, which converts to the Explore STAR Transferrable Extended Life of the Product Warranty when product is registered within 60 days of purchase. We think that you will find Explore Scientific eyepieces rank among the finest obtainable and represent an outstanding value.
| Free Shipping Graphic | Free US Shipping |
|---|---|
| Eyepiece Series | Explore Scientific 68° Argon-Purged Waterproof Series |
| Focal Length | 40mm |
| Barrel Size | 2" (50.8mm) |
| Apparent Field of View (Mfg Specified) | 68° |
| Eye Relief (Designed) | 31mm |
| Filter Threads | Standard 2" Filter Thread (M48 x 0.75) |
| Coatings | EMD (Enhanced Multilayer Deposition) Coatings |
| Lens Elements | 6 |
| Lens Groups | 4 |
| Blackened Lens Edges | Yes |
| Barrel Type | Tapered barrel |
| Protective Plastic Storage Container | Yes - Free Agena Eyepiece Container |
| Protective Plastic Storage Container Size | Agena 85x120mm |
| Optical Design | 6 Elements; Combination of: Dense Crown, Light Crown, Dense Flint, and Lanthanum Optical Glasses |
| End Caps | 2 |
| Parfocal | Yes |
| Rubber Eye Guard | Rubber Folding Type |
| Warranty | One Year Limited Warranty; Extendable to Five Years |
| Weight | 2lb - 3oz |
| Country of Manufacture | China |
| Misc. Information | Body: Anodized Black Aluminum; Laser-Etched Description and Serial Number; Rubber Grip: Internally O-Ring Sealed and Argon Purged Barrel: Stainless-Steel, Double Taper, Accepts Standard Filters |
| Hide Found a better Shipped Price on Frontend? | No |
Explore Scientific 2" 68° Series Argon-Purged Waterproof Eyepiece - 40mm