Product Description
The latest computer design programs have been used to optimize its performance. Its seven element/four group design uses low dispersion and high refractive index lenses and full multicoatings for high contrast, high resolution, and flat field images across a very wide 82° field of view. The lens edges have been blackened to improve contrast.
The 6.7mm 82° Explore Scientific works with any telescope from a fast focal ratio reflector to a long focal length refractor. It's particularly good with Dobsonians and fast focal ratio refractors, providing high magnification with a very wide field of view for observing globular clusters and compact nebulas.
At 14mm, the eye relief is surprisingly good for such a short focal length eyepiece, although eyeglass wearers will still see a somewhat vignetted image. This isn't as much a problem as you might think, as the 82° field of view is so wide that even non-eyeglass wearers have trouble seeing the whole field at once. This is an eyepiece that shows you a "picture window view" of space for a true full-immersion observing experience. With its unconstricted view, your eye relaxes, allowing you to easily use the "averted vision" technique to study faint details across a huge field of view.
You can use the calculator in the "formula" tab above to see just how wide the field will be with your particular telescope. For example, it will give you a 0.77° field (half again as wide as the full Moon) at 106x with a 4" f/7 refractor like the Explore Scientific 102mm triplet apo refractor.
The eyepiece has a soft fold-down rubber eyecup and comes with dust covers for both ends of the eyepiece.
This individually serial numbered Explore Scientific eyepiece is backed by a limited one year warranty, which will be extended to an Explore Scientific transferable lifetime limited warranty when its warranty card is registered with Explore Scientific within 60 days of purchase. This link will take you to full details on this unique transferable lifetime warranty.
Tech Details
Reviews
With the TMB130SS and the 6.7 ES I get many "wow!" reactions during outreach events when viewing the Moon, Saturn and Jupiter. (Posted on 10/31/2019)
One thing to note is that the usable eye relief is shorter than advertised, due to the recessed eye lens. I would say it is more like 11-12mm. I can see the whole field of view but really have to push into the rubber eyeguard. This is NOT an eyepiece for people who wear glasses at the telescope. (Posted on 9/21/2019)
it has an excellent build quality. My only complaint is the eye relief was not enough to see the whole field when I was wearing my glasses. (Posted on 12/10/2018)
