About this product
Part Number: 0219912
Designed to balance the modern demands of field sharpness over a wide apparent field, with long eye relief, which is of particular benefit to those who wear glasses while observing.
The 8 lens (arranged in 6 groups) design yields superbly corrected views and the long eye relief and wide occular diameter combine to deliver a fantastic user experience.
The 12mm focal length will be a good fit for many different telescope designs and focal ratios. Those who have lower focal ratio instruments, such as shorter ED and Apo refractors, will adore the widefield deep sky views this eyepiece delivers. Whilst owners of 8, 9.25 and even 10-inch (on nights of good seeing) SCT or RC telescopes, who are looking for higher power planetary and lunar magnifications will love what this eyepiece does for their particular instruments.
The 17mm focal length will be a good fit for many different telescope designs and focal ratios. Those who have lower focal ratio instruments will adore the widefield deep sky views this eyepiece delivers. Whilst owners of 10, 12 and 14-inch SCT or RC telescopes, who are looking for higher power planetary and lunar magnifications will love what this eyepiece does for their particular instruments.
Explore Scientific's EMD coatings provide exceptional contrast and combat internal reflections extremely efficiently. Internal baffles and blackened internal fittings complement the EMD coatings.
Explore Scientific 92° Argon LE eyepieces are Argon purged and completely waterproof - so is impervious to dirt, moisture and fungal ingress.
Threaded to accept 2" filters.
- Wide-angle 92 degree Apparent Field Of View
- Premium grade optical glass
- All surfaces fully multicoated for maximum light transmission
- Internal baffles and blackened lens edges and internal metal surfaces to maximise contrast and reduce ghosting
- Long eye-relief (good for eyeglass wearers)
- Foldable rubber eyecups
- Tapered 2" barrel for extra security
Eyepiece Field of View Simulator
|Model ||12mm ||17mm |
|Product Code ||0219912 ||0219917 |
|Eye Relief ||19.9mm ||22mm |
|Field Diaphragm (virtual) ||19.6mm ||27.4mm |
|Barrel Size ||2” / 50.8mm ||2” / 50.8mm |
|Barrel Length ||33mm ||39mm |
|Lenses ||8 ||8 |
|Lens Groups ||6 ||6 |
|Height (From End of Barrel) ||154mm ||148mm |
|Width ||70mm ||72mm |
|Eyecups ||Foldable rubber eyecups ||Foldable rubber eyecups |
|Weight ||1100g ||1100g |
|Average Rating (1 Review): |Game changer for glasses wearers
Tuesday, 20 November 2018 | Richard
Since the introduction of Tele Vue 80°+ (& imitations) field of view eyepieces, those who have to or prefer to wear eyeglasses have missed out on being able to use eyepieces with very wide apparent fields of view, due to too-short eye relief, &/or too critical eye positioning.
These Explore Scientific 92° eyepieces put that right, at least for the 2 focal lengths made so far. They have eye relief and comfort exceeding any other make or design so far. Their 92° apparent field of view is 10° wider than Naglers, and 8° short of Ethos. But their biggest and best feature is the eye comfort they give, with sufficiently long eye relief, and easy to hold exit pupil. 30 years I have waited for suchlike.
I started by buying the 12.5mm for viewing globular clusters, smaller nebulae and portions of larger starfields. No astigmatism, or edge of field issues, a truly immersive "spacewalk" viewing experience. Not long after I bought the 17.5mm for wider views, Andromeda Galaxy M31, and M42 Orion Nebula, where the larger exit pupil benefits use of narrowband filters like OIII.
If you wear glasses, I recommend these eyepieces for their comfort, ease of use, and for anyone, their superb performance.
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