Both the 68° and 82° Explore Scientific eyepieces performed splendidly. It is 83mm tall, 48mm wide and weighs 256g (9.0 oz.). After testing the two 68° and 82° Explore Scientific eyepieces, I decided to stick with the 82° eyepieces and bought two additional ones. Designed by WPZOOM. Therefore, I have to use a focuser extended. Thus, I began a search for some high quality 1.25-inch eyepieces to augment my arsenal of 2-inch eyepieces. The designed had names like Ramsden, Erfle, Huygen, Kellner, König and Orthoscopic, to name a few. Eye relief, exit pupils, and field of view (FOV) were much smaller than today’s offerings. I felt Naglers were the best eyepieces made. I predominantly used Plössl eyepieces in the 1980s and 1990s. Not only did I compare the eyepieces to each other, but I also compared them with a 13mm Tele Vue Ethos eyepiece, a 9mm Tele Vue Nagler eyepiece and a 15mm Tele Vue Plössl eyepiece (Image 4). View our Privacy Policy. The eye relief is around 12mm with a field stop diameter of 18mm. Enter the Space & Beyond Box Photo Contest! You can also check out a free sample issue here. The argon purges any moisture that might condense on the lenses during cold weather use. Click here to get these deals which only will be available for a very limited time. The mount is extra. Even with the eyepiece’s 82° FOV, objects did not stay in the eyepiece very long before I needed to nudge the telescope. So I expected to see the same view when interchanging them in the focuser, with the exception of the field being more spread out in the 82° eyepiece. Image 1 shows the two eyepieces I purchased. I still have my favorite 18mm Orthoscopic and a few Ramsdens. Each came in the typical foam-padded Explore Scientific box with the decorative star-chart covers. They are so heavy that I cannot use them with my 70mm apo (see ATT, volume 11, issue 2) on my iOptron Cube Pro (see ATT, volume 10, issue 6) mount. Buyers must weigh those two factors before purchasing. Order now to get your Black Holes Collection from Space & Beyond Box! The designed had names like Ramsden, Erfle, Huygen, Kellner, König and Orthoscopic, to name a few. Get ready for this Halloween’s Blue Hunter's Moon, Infinity & Beyond — Episode 9: Saturn's rings, Infinity & Beyond — Episode 8: Black holes 101, Queen guitarist Brian May and David Eicher launch new astronomy book. The AR152 has received several good reviews since it came out, along with all of Explore Scientific’s products, and is offered at the unbelievable price of $750. Explore Scientific Eyepiece Review. The views through all four were superior the 15mm Plössl, where the stars were not as sharp near the edges. Image 2 shows the top of the eyepieces with the generous diameter of the glass. My 12mm yielded 178x with this telescope. As you can see from this Explore Scientific Eyepiece Review I think I am finally set for life with high quality telescope eyepieces! Explore Scientific’s ED152 f/8 Air-Spaced Triplet is a diffraction-limited 6-inch (152 millimeters) apochromatic refractor. The true field of view of an eyepiece is calculated by dividing the apparent field of view, in this case 68° or 82°, by the effective magnification. By signing up you may also receive reader surveys and occasional special offers. In addition, the photo shows a 9mm (borrowed) Tele Vue Nagler and a 13mm Tele Vue Ethos eyepieces. The 82° cost more than the 68° eyepieces. The eyepieces come with roll-up rubber eye guards that can be removed and easily replaced if they become worn. I owned 31mm, 26mm 22mm, 20mm, 12mm, 5mm and 4.8mm models. For $699, you get the optical tube, cradle, 8X50 finder, 2" diagonal, and a (non-rotatable) two speed focuser. Explore Scientific’s ED152 f/8 Air-Spaced Triplet is a diffraction-limited 6-inch (152 millimeters) apochromatic refractor. My opinions of the eyepieces are available in this Explore Scientific Eyepiece Review. Ask Astro: Why does the Moon disappear during New Moon? 5.0 out of 5 stars Quality made item! However, I have had two challenges with them. Four new giant telescopes are about to rock astronomy, Celestron celebrates 60 years of crafting telescopes, The history and future of telescopes on the Moon, Earth's best telescopes have closed, but the hunt for dangerous asteroids continues, COVID-19 forces Earth's largest telescopes to close, The history of the Ritchey-Chrétien telescope, Humans have been living on the ISS for 20 years, Sprites and elves frolic in Jupiter's skies, Space Gift Ideas for Astronomy Buffs and Skygazers for the 2020 Holiday Season, Travel to Costa Rica in February 2021 with. Image 3 shows the two eyepieces standing next to several other eyepieces for comparison. With high quality glass and lens coatings, Plössls provide high-contrast, symmetric views. Receive news, sky-event information, observing tips, and 2225 West Frye rd Chandler 85224 AZ +1(480)493-5089 The same was true with the 9mm Nagler and the 13mm Ethos. 0 Comment Report abuse Geminijk. Each had pros and cons. The quality is superb. While the Explore Scientific eyepieces are notable beefier than the two Plössls, the Nagler and Ethos eyepieces dwarf them. The FOV is so large I have to pan my eyeball around to see everything the eyepieces capture. scope a breeze compared to the heavy hard case it come with. View our Privacy Policy. Is it better to use a telescope or binoculars to observe space? The Explore Scientific ED APO 102mm f/7 Deluxe FCD-100 Hex-Focus is a short focus refractor. Although the focal length is smaller, the 14mm 82° eyepiece is the larger of the two. Explore Scientific ED152 f/8 Air-Spaced Triplet. I eventually traded in my 12mm Nagler for a 13mm Ethos to use with my 14-inch f/6 Dobsonian telescope. They also came with top and bottoms dust caps. One is a Tele Vue Plössl, while the other is a generic Plössl. The former and the latter of those three provided comparable magnification, while the 9mm resulted in a noticeable higher power. When I first bought my first telescope in the 1970, there were many types of eyepieces to choose. First several of my telescopes do not have enough back focus range for the longer focal length (12mm and longer) eyepieces to focus. Copyright © 2020 Astronomy Technology Today. The 24-pound (10.9 kilograms) telescope comes with a carbon-fiber tube, a Starlight Instruments focuser, and a 2" diagonal mirror. The weight of the eyepieces causes too much rotational torque on the tube. The Explore Scientific 24mm 82° did not come in a 1.25-inch barrel option, so I went with the 68° 24mm eyepiece. The Orthoscopic is great for viewing planets and Ramsdens are still the safest (for the eyepiece) design to use for solar projection. Bracketing the Explore Scientific eyepieces are two Plössl eyepieces with similar focal lengths. The eyepieces are waterproof and sealed with inert argon gas between the elements. I prefer the wider FOV of the 82° eyepiece over the 68° eyepiece. The ED152 Air-Spaced Triplet FCD1 Series in Carbon Fiber with 3" HEX Focuser represents perhaps the greatest value in a large aperture ED Apochromatic refractor available today. They still are made and sold today. However, my new set of 82° Explore Scientific 1.25-inch eyepieces will be my primary eyepieces when using my 190mm Mak-Newt, or when I am travelling light with my 70mm apo with either my iOptron Cube Pro mount or my Explore Scientific Twilight II mount. I tested each eyepiece in a 132mm f/7 apochromatic refractor and in a 190mm f/5.3 Maksutov-Newtonian reflector. I did a lot of research and decided to try out Explore Scientific 68° and 82° eyepieces. The 100° FOV is quite impressive, almost too much to take in. The choice of whether to use the 68° and 82° Explore Scientific eyepieces boils down to two factors. In the 1980s, Plössl eyepieces started showing up everywhere and became very popular. In a 1000mm focal length telescope, the 14mm provide 71.4x magnification, while the 16mm provides 62.5x. More recently, I tested some Tele Vue Ethos eyepieces along with my Naglers. My Nagler and Ethos eyepiece are superb, and I feel are the best I have ever used. And to make it easier for you to get the most extensive news, articles and reviews that are only available in the magazine pages of Astronomy Technology Today, we are offering a 1 year subscription for only $6! Cruise to totality in the South Pacific with Astronomy in 2020! One is FOV. With the 13mm Ethos, the magnification is slightly lower (164x). It has 15.6mm of eye relief and a field stop diameter of 18.9mm. The other factor is cost. When I first bought my first telescope in the 1970, there were many types of eyepieces to choose. And that’s exactly what I saw. Plössl provided a then large 50° or more apparent FOV.

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