Explore Scientific 52° 4.5, 10, 20, and 30 mm Waterproof
Argon-Purged Eyepiece Set With Soft Case
This Explore Scientific 52° 4-piece Waterproof Argon-Purged Eyepiece Set provides all the comfort, quality, and value you have learned to expect from Explore Scientific. The Explore Scientific 52° Series™ eyepieces are excellent flat-field multi-element oculars that will literally transform your visual astronomy experience to new heights. With an apparent field of view of 52°, these four eyepieces offer incredible value in unusually high quality eyepieces. Expect exceptional quality and value versus comparably priced Plossl EPs. This Kit includes a convenient soft carry case to store and transport your eyepieces.
Using advanced computer design, combinations of low-dispersion and high-refractive index optical glasses, and durable multilayer deposition coatings, Explore Scientific 52° Series™ Argon-Purged Waterproof 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 52° apparent field is truly a full-immersion experience. The 52° 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 your telescope.
These eyepieces are all Argon gas purged during manufacturing. The sealed, dry environment of these eyepieces is impervious to internal fogging and contaminants such as fungus, growing in between the lens elements. Explore Scientific waterproof eyepieces are 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 ensure a perfect seal every time, every eyepiece is factory tested in one meter of water for 30 minutes.
Argon atoms are “larger” than those 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 angstrom and has a larger molecular volume. 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 might be introduced through a weakened seal. And finally, because Argon is less conductive for heat than Nitrogen, Argon cools slower thereby buffering the effects of rapid external temperature changes of the optics.
What's In The Box: This kit includes a 52° 4.5 mm, 10 mm, 20 mm and 30 mm Argon-Purged Waterproof Eyepiece and a soft-sided carrying case. These eyepieces are individually boxed in the Explore Scientific "Will Tirion famous" star map box along with the soft-sided case inside an outer box.
|Description:||52° Series Argon-Purged Waterproof Eyepiece Kit|
|Focal Length:||4.5 mm. 10 mm, 20 mm, and 30 mm|
|Barrel Size:||1.25" and 2.0”|
|Eye Relief:||Depends on specific eyepiece|
|Field Stop Diameter:||Depends on specific eyepiece|