Explore Scientific 12 mm 92-Degree LER Waterproof 2" Eyepiece
Explore Scientific 12 mm 92° Waterproof 2" Eyepiece
The Explore Scientific 92° Series™ eyepieces are hyper-wide class oculars that can transform your visual astronomy experience. You may be startled at the amazingly wide expanse of inky black sky you behold the first time you bring your eye to a 92° Series eyepiece, and after awhile, you may even forget that you have an eyepiece between you and the universe! Objects are not only easier to locate, but for non-driven telescopes the object will stay in the field of view for a very long time before any adjustments need to be made. The Explore 12 mm 92º Eyepiece has great eye relief at almost 20 mm. This is not always the case with very wide fields of view, but Explore wanted to increase the comfort level for long nights of observing as well as give you an amazingly immersive visual experience.
Another great benefit of hyper-wide eyepieces is the ease with which you can gaze, not directly at an object, but slightly to either side. This skill, called using averted vision, is especially helpful when observing faint objects, because using averted vision puts the image on a part of your eye that is more sensitive to light, allowing you to see fainter images.
The Explore 92° Series eyepieces 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.
By making the eyepiece body Argon-purged, the eyepiece’s 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. Explore Scientific’s waterproof eyepieces are easier to clean, and there is no risk of cleaning solution migrating from the top of the lens and seeping around the edges to be trapped in between elements. To insure a perfect seal, Explore tests every eyepiece in one meter of water for 30 minutes.
12 mm 92-Degree Eyepiece Specifications
- Focal Length: 12 mm
- Field of View: 92 Degrees
- Eye Relief: 19.92 mm
- Field Stop: 19.6 mm
- Barrel Size: 2"
- Weight: 26 ounces
- Coatings: Fully Multi-Coated
- Waterproof: Yes, purged with Argon gas
