Explore Scientific 82 Degree Series 30mm Waterproof Eyepiece | EPWP8230-01
EPWP8230-01
Explore Scientific 82 Degree Series 30mm Waterproof Eyepiece | EPWP8230-01
EPWP8230-01
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Product Description
The 30mm 82° Series Waterproof Argon-Purged Eyepiece is a popular focal length in the upper-medium power magnification class providing both super-wide apparent field and generous eye relief.
It is perfect for any application where more power is desired including observing globular star clusters, planetary nebulae, the bright cloud structure near the nucleus of comets, initial observations of planets, and (with the proper safe filtration on your telescope), observations of active regions of the sun. Use with Explore Scientific Focal Extenders for 2X, 3X, or 5X magnification increases while maintaining the eyepiece native apparent field and eye relief.
Using advanced computer design, combinations of low dispersion and high refractive index optical glasses, and durable enhanced multilayer deposition (EMD) coatings, Explore Scientific 82° Series super 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 82° apparent field is truly a full-immersion experience. Your eye is relaxed, allowing you to easily use the “averted vision” technique to study faint details across a huge field-of-view.
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 Ultra-Wide Eyepieces - Comfort, Quality, Value. Explore Scientific 82° Series eyepieces, with their 82° apparent field of view, immerses you in a very comfortable ultra-wide field that naturally promotes relaxation at the eyepiece. When you relax your eyes and take in the scene presented before you, it is much easier to observe for longer periods of time, and details begin to materialize that may not have become apparent to you at first glance. Another great benefit of ultra-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.
Use with the Explore Scientific 2X Focal Extender (2.0-inch O.D.) to double the magnification of this eyepiece (making it an effective 15mm focal length while maintaining the same eye relief and apparent field.
Specifications
| Item Number | EPWP8230-01 |
| Focal Length | 30mm |
| Length | 131mm |
| Width | 82mm |
| Weight | 35.5oz (1000g) |
| Barrel Size | 2.00" |
| Eye Relief | 22.0mm |
| Field Stop Diameter | 43.0mm |
Customer Reviews
As an owner of both the Explore Scientific 30mm 82° and the Tele Vue Nagler 31mm, I’ve spent considerable time comparing them side by side under a range of observing conditions and across a variety of telescopes, including f/10, f/5.5, and f/4. Here’s my take after extensive use.
In terms of image quality, these two eyepieces are remarkably close. Sharpness, contrast, and edge correction are almost indistinguishable in side-by-side comparison, even at faster focal ratios like f/4. If you’re worried that the ES30 is a major step down from the Nagler optically, don’t be. It holds its own extremely well across all focal lengths.
Both eyepieces are very forgiving when it comes to eye placement, which is a big plus for long sessions. You don't have to constantly hunt for a good eye position, and blackouts are rare once you find the right positioning.
One area where the Explore Scientific pulls ahead is in pincushion distortion control. The Nagler shows noticeable pincushion distortion, straight lines bend a lot near the edge of the field, which can be distracting. The ES30 handles this much better, presenting a flatter, more natural view. This makes the ES30 more usable for lunar observing, daytime use, or any application where geometric accuracy matters.
The Nagler top lens is less recessed than on the ES30, which contributes to a more immersive “spacewalk” feel. It just feels more open and natural when observing. It is definitely the better choice if you wear glasses. Its more generous eye relief and less recessed lens make it significantly easier to see the entire field while wearing glasses. The ES30, while still usable, has a more recessed top lens and slightly tighter eye relief, which can make it more difficult for eyeglass wearers to take in the full field comfortably.
If you want the absolute best in immersion and comfort, and wear glasses, go with the Nagler. But if you're looking for exceptional performance at a better value and particularly want lower pincushion distortion, the ES30 is a truly outstanding choice.
