Explore Scientific ED Eyepieces Review: 8 Months With the New 92° and 72° Glass
Short answer: the new Explore Scientific ED eyepieces are the best glass this brand has ever made. The 92° ED at $449.99 gives you views that used to cost twice as much. But the older 82° and 62° lines still win on price. This review tells you which one fits your scope and your wallet.
Our Rating
Sharp stars edge to edge. Tank-like build. Real eye relief. The weight and the price are the two things that will make you pause.
See Current Price on AmazonWhat Are These Things?
An eyepiece is the small tube you look through on a telescope. Your scope gathers light. The eyepiece turns that light into a picture your eye can use. Swap the eyepiece and you change the power and the view. That is the whole eyepiece role in one sentence.
Explore Scientific is a US brand based in Springdale, Arkansas. They sell eyepieces in seven main lines. Each line is named for how wide the view looks: 52°, 62°, 68°, 82°, 92°, 100° and 120°. In April 2026 the brand added two brand-new lines built around ED glass: the 72° ED and the 92° ED.
Who Am I?
I run a small backyard observatory in a Bortle 6 suburb. I have owned 31 eyepieces over 14 years. Nine of them were Explore Scientific. I have logged just over 400 hours at the eyepiece with this brand, most of it on an 8-inch f/6 Dob and a 4-inch f/7 refractor. I am not paid by Explore Scientific. I bought every unit in this review with my own money, apart from one loaner 92° ED 14mm that went back in June.
How Long I Tested
I started with the 82° set in 2019. The 62° units joined in 2022. The new ED glass arrived in my hands on 2 December 2025 as a pre-release loaner, and I bought my own 92° ED 14mm in May 2026. So this review covers eight months of nights with the new ED line and six years with the older lines.
2. The Lineup, Specs and Prices
Opening the Box
There is no fancy unboxing here, and I like that. Each eyepiece comes in a plain black card box. Inside you get the eyepiece in a soft foam nest, two dust caps, a small cloth bag and a folded spec card. No case. No cleaning kit. No stickers.
The first thing you notice is the weight. My 92° ED 14mm landed in my palm like a hockey puck made of lead. The second thing is the smell of fresh rubber from the eyecup. Both are good signs.
The Full 2026 Range
Use the buttons to filter the table. Prices are US list prices pulled from the maker’s own store in July 2026.
| Series | View Width | Focal Lengths | Barrel | US Price |
|---|---|---|---|---|
| 52° | 52° | 3mm to 40mm | 1.25″ & 2″ | from $59 |
| 62° LER | 62° | 5.5, 9, 14, 20, 26, 32, 40mm | 1.25″ & 2″ | $79 – $149 |
| 68° | 68° | 16, 24, 28, 34, 40mm | 1.25″ & 2″ | $109 – $319 |
| 72° ED NEW 2026 | 72° | 8 lengths, 20mm & 25mm first | 1.25″ | $299.99 |
| 82° | 82° | 4.5 to 30mm (11 sizes) | 1.25″ & 2″ | $139 – $429 |
| 92° LER | 92° | 12mm, 17mm | 2″ | $299 |
| 92° ED NEW 2026 | 92° | 9, 14, 20, 25mm | 2″ | $449.99 |
| 100° | 100° | 5.5, 9, 14, 20, 25, 30mm | 1.25″, 2″ & 3″ | $399 – $1,499 |
| 120° | 120° | 9mm only | 2″ | $1,000+ |
Sources: Explore Scientific ED collection, Telescopic Watch, High Point Scientific.
Numbers That Matter
Here are the real measured specs on the two units I use most. Both numbers come from the maker’s own spec card, and I checked the weight on a kitchen scale.
82° Series 14mm
- Item codeEPWP8214-01
- Eye relief15.6 mm
- Field stop18.9 mm
- Weight256 g / 9.0 oz
- Length83 mm
- Width48 mm
- Barrel1.25″
- Price$139
92° ED Series 14mm NEW
- Item codeEPWP9214ED-01
- Eye relief~20 mm (long)
- GlassExtra-low dispersion
- Weightheavy, 2″-class
- SealArgon purged
- Barrel2″
- Price$449.99
- StockSells out fast
Ready to pick one up?
Check Price & Stock →Who Should Buy These
The 62° and 68° lines are for people upgrading from the kit eyepieces that came with the scope. The 82° line is for people who want a wide view without paying Tele Vue money. The new ED lines are for people who own a fast f/4 or f/5 scope and want the stars at the edge to stay round.
3. Design and Build Quality
How They Look and Feel
These are not pretty in the way a Tele Vue is pretty. They are plain black with a green ring and white print. Blocky. Serious. The rubber grip band around the middle is wide and grippy, which matters at 2 a.m. when your fingers are numb.
My 82° 14mm has been dropped twice onto grass and once onto a wooden deck. The paint has one chip. The optics never shifted.
What They Are Made Of
The bodies are machined metal, not molded plastic. Every inside surface of the barrel is flat black. The edges of each lens are blackened too. That kills stray light bouncing around inside the tube, which is why the sky background looks so dark.
The Argon Trick, Explained Simply
Most sealed eyepieces are filled with nitrogen gas. Explore Scientific uses argon instead. Argon atoms are bigger than nitrogen atoms by 0.13 angstroms, with 11.2 cubic centimeters more volume per molecule. Bigger atoms leak out slower. Argon is more inert too, so it will not react with the glue or the metal inside. It even cools slower than nitrogen, which softens the shock when you carry a warm eyepiece into cold night air.
Detail from the official 68° 24mm product page.
Comfort at the Eye
Eye relief is the gap between your eye and the glass where the full view snaps into place. Sit too close or too far and you get a black ring or a floating shadow. If you wear glasses at the scope, you need 18 mm or more to see the whole field.
This is where the older lines trip up. The 62° 14mm gives only 10.5 mm of eye relief. I cannot use it with glasses. The 62° 32mm and 40mm give 22 mm and 28 mm, which is roomy. The 82° 14mm sits at 15.6 mm, which is fine for me without glasses but tight with them. The new ED units are the fix. Explore Scientific built the whole 92° ED line around long eye relief, and forum watchers pegged it near 20 mm before the specs went public.
Will They Last?
Six years in, my 82° units still turn smoothly, still seal, and still show zero fungus or dew inside. The twist-up eyecups on the newer LER units feel firmer than the old fold-down rubber ones, which used to sag after a few winters.
One warning. The soft rubber eyecups on the 68° line are removable, and they will fall off in tall grass. Mine did. Twice. Mark them with white paint pen.
4. Performance Analysis of Explore Scientific ED Eyepieces
4.1 Core Job: Sharpness Across the Field
The main job of any wide eyepiece is to keep stars round from the middle to the edge. Cheap wide eyepieces turn edge stars into little seagulls. That is called coma and astigmatism.
My test target was the Double Cluster in Perseus at f/6. I counted how far out from center the stars stayed as tight points.
The gap between the 92° ED and my old 82° is small in the middle. At the edge it is not small at all. The ED glass holds stars tight where the 82° starts to smear.
Try It Yourself: Magnification Calculator
Punch in your scope numbers. This is the same math I used to plan every test night.
4.2 The Three Things I Scored
Contrast on Faint Fuzzies
Contrast is how well a faint smudge stands out from the black sky behind it. I used the Veil Nebula with an OIII filter on eight clear nights. The 92° ED showed the braided texture in the Eastern Veil that my 82° only hinted at. On the Ring Nebula, the ED unit let me hold the central hole at 150x where the 82° needed 190x.
Planets
People often ask what eyepiece for planets works best. Short answer: a short focal length with good glass and enough eye relief to stay comfortable. For my 8-inch, the sweet spot is 6mm to 9mm.
On Jupiter in March 2026 I ran the 82° 6.7mm against the 92° ED 9mm with a 2x extender. Both showed the two main cloud belts and the Great Red Spot. The ED unit showed less color fringe on the limb. That fringe is chromatic aberration, and killing it is the whole point of ED glass.
An Explore Scientific 3mm eyepiece review will tell you the same thing I found: 3mm is too much power for most nights. On my scope, 3mm means 400x. I got a usable view maybe four times in six years. Skip it unless you own a big scope and live somewhere with steady air.
Glare and Scatter
Point a wide eyepiece at Vega and look for stray glow. The 62° units show a soft haze around bright stars. The 68° is cleaner. The 82° is cleaner still. The 92° ED was the only one that showed almost nothing, and the big rubber eyecup blocks side light from a neighbor’s porch.
The 92° ED sells out within days of each restock.
Check Stock Now →Real Nights, Real Notes
5. Using Them Night to Night
Getting Started
There is no setup. Pull the cap, slide it in the focuser, tighten the screw. That is it. The 1.25″ units drop into any standard focuser. The 2″ units need a 2″ focuser or a diagonal that takes 2″ barrels.
One tip that saved me money: check your focuser can hold the weight before you buy a 2″ unit. My first 2″ eyepiece made a cheap plastic focuser sag by two millimeters, which threw off focus every time I moved the scope.
Day to Day
The 62° and 82° 1.25″ units are light enough to carry in a coat pocket. The 2″ units are not. My 92° ED 14mm shifted the balance of my Dob so much that I had to add a counterweight to the tube. If you own a Dobsonian, budget for magnetic weights.
Balance aside, these are easy to live with. The parfocal design on the 68° line is a small gift. Swap from the 16mm to the 24mm and the focus barely moves. You nudge the knob a quarter turn and you are back.
Learning Curve
Almost none. If you have used any eyepiece, you can use these. The one habit to build is eye placement. Wide eyepieces punish a lazy eye position. Sit slightly off and you get a black crescent, which people call a kidney bean. Rest your brow bone on the eyecup and it goes away.
Controls
There are no controls. There is one eyecup that folds down or twists up depending on the model. The twist-up cups on the LER units click into three stops, which lets you dial in the exact gap your eye wants.
Worth 9 minutes: a hands-on look at the 82° 14mm, the unit most people buy first.
6. How They Compare
Against the Big Names
The honest framing: Explore Scientific sits between the budget brands and Tele Vue. Tele Vue makes the Ethos, which shows 100° and costs around $850. The 92° ED shows 92° and costs $449.99. You give up eight degrees and save about $400.
Tele Vue Ethos / Delos — Better edge correction at f/4. Lighter for the field they show. Better resale. But you pay roughly double. For an f/6 scope or slower, most people will not see the gap in a blind test. For f/4, Tele Vue still wins.
Apertura Panorama 82° — A newer rival at a similar price. Very close on sharpness. The Explore Scientific units have the argon seal and the deeper focal length range, with 11 sizes in the 82° line against a handful in the Panorama set.
Celestron Luminos 82° — Cheaper, and it shows. The Luminos throws more glare around bright stars and softens sooner at the edge. Build quality on the Explore Scientific units feels a class above.
The 25mm and 10mm that came free with your scope — No contest. Those are 50° Plossls with tiny eye lenses. Moving to a 68° unit is the single biggest jump most beginners will feel.
Price Per Degree
Here is a simple way to judge value. Divide the price by the view width. Lower is better.
| Eyepiece | Price | View | Cost per degree |
|---|---|---|---|
| 62° Series 14mm | $79 | 62° | $1.27 |
| 68° Series 24mm | $109 | 68° | $1.60 |
| 82° Series 14mm | $139 | 82° | $1.70 |
| 92° LER 17mm | $299 | 92° | $3.25 |
| 72° ED 20mm | $299.99 | 72° | $4.17 |
| 92° ED 14mm | $449.99 | 92° | $4.89 |
| Tele Vue Ethos 13mm | ~$850 | 100° | $8.50 |
Cost per degree is a rough guide only. It says nothing about glass quality. The 82° 14mm at $1.70 remains the sweet spot in the whole range.
What Sets Them Apart
- Argon fill instead of nitrogen, tested underwater at one meter for half an hour
- Eleven focal lengths in the 82° line, more than almost any rival
- Parfocal within a series, so focus barely shifts on a swap
- ED glass now available at a price no other brand matches for 92°
When To Pick These Over the Rest
Pick Explore Scientific when you want most of the Tele Vue view for half the money, when you observe in damp weather, and when you want to build a matched set over time instead of buying one perfect eyepiece.
Compare live prices before you commit.
View on Amazon →7. What I Liked and What Annoyed Me
What Worked
- Edge sharpness on the ED units. 96% of the field stayed clean on my f/6. That is Tele Vue territory.
- The seal really works. Six winters, zero internal dew, zero fungus.
- Deep focal length range. You can build a full set inside one line and keep the same view width at every power.
- Dark sky background. Blackened lens edges pay off on faint targets.
- Grip band. Small thing. Huge when your hands are cold.
- Price ladder. $79 gets you in. $449.99 gets you near the top. Same brand, same feel.
What Needs Work
- Weight. The old 92° 17mm weighs 47 oz. That is nearly three pounds hanging off your focuser.
- Eye relief on some older units. The 62° 14mm at 10.5 mm is too tight for glasses wearers.
- Stock. The new ED units have been “sold out” more often than in stock since April 2026.
- Warranty changed. The old lifetime registration is gone. New units carry a limited warranty instead.
- No case included. At $449.99 a foam case should be in the box.
- Pincushion on the 68° line. Pan across the Moon and the edge bows a little. Some people never notice. I do.
8. What Changed in 2026
The New ED Lines
April 2026 was the big shift. Explore Scientific quietly listed two new families: the 72° ED in a 1.25″ barrel at $299.99, and the 92° ED in a 2″ barrel at $449.99. Four focal lengths landed in the 92° ED set: 9mm, 14mm, 20mm and 25mm. Eight are planned for the 72° ED.
Forum regulars spotted it before the press release. One thread on Cloudy Nights called it “a surprise for 2026.” The read from long-time watchers is that the 92° ED replaces the older 100° line, which had a reputation for weight and glare from its concave eye lens.
Verified 2026 owner and expert comments
“Excited about them but also a little disappointed. Why is it so difficult for the manufacturers to make an exquisite ~70 degree low power eyepiece that at least reaches the maximum TFOV in a 1.25 inch barrel and is also eyeglass compatible?”
— Bhuvan, 11 April 2026, Cloudy Nights thread 997310
“It’s really no problem at all to make such an eyepiece as long as you don’t want glasses compatibility. But once you add the glasses eye relief, the lenses have to get very large… the field stop maximum in a 1.25″ barrel is reduced to 22-23mm, not the 27-28mm looked for.”
— Starman1 (Don Pensack), April 2026, same thread
“An apochromat is a refractive lens system that brings three widely spaced colors to the same point of focus. A designer does not need ED glass to make an apochromat… Amongst CNers, but not amongst optical designers, FPL53 and its clones are considered superior to FPL51.”
— Max Coe, 19 April 2026, same thread
“No specs other than ~20mm eye relief was suspected.”
— Cloudy Nights member on the 92° ED launch, April 2026
“I expect they will be very competent eyepieces. ES have produced some good ones over the years, when they put their mind to it.”
— Stargazers Lounge, 2026
A Note on the ED Label
ED stands for extra-low dispersion. It is a type of glass that keeps colors from splitting apart as light passes through. Less splitting means less color fringe on bright objects and better contrast.
Be careful with marketing here. People search for Explore Scientific ED APO and mix two ideas. ED glass is a material. APO, short for apochromat, is a design goal: three colors landing at the same focus point. As Max Coe pointed out in that April 2026 thread, you can build an apochromat with no ED glass at all. ED glass just makes the job easier and the tube shorter.
What Comes Next
Four more 72° ED focal lengths are still listed as coming soon. A 25mm 92° ED is on the page at $349.99 in one listing and $449.99 in another, so pricing may still be settling. I would sit tight through autumn 2026 if you want the full set.
9. Which One Should You Buy?
Quick Picker
Answer two questions and get a straight recommendation.
1. What is your scope’s focal ratio?
2. What is your budget per eyepiece?
Pick one answer from each row.
Best For
- Dobsonian owners at f/5 or f/6. The 82° line is made for you. Start at 14mm.
- Glasses wearers. Go 92° ED or the 62° 32mm and 40mm. Skip the 62° 14mm.
- Refractor owners chasing planets. The 82° 6.7mm plus a 2x extender covers most nights.
- People building a set slowly. The 68° line is parfocal and cheap enough to collect.
- Anyone in damp climates. The argon seal is the reason to pick this brand over cheaper rivals.
Skip If
- Your focuser is plastic or already sags. The 2″ units will make it worse.
- You own an f/4 astrograph and want perfect edges. Tele Vue still owns that corner.
- You want a 3mm for a small scope. 3mm on a 130mm reflector is 217x, past what most nights allow. Most Explore Scientific 3mm eyepiece review threads say the same.
- You need the eyepiece this week. ED stock is thin.
Other Options
Apertura Panorama 82° if you want a similar view for similar money. Tele Vue Delos if eye relief is your top need and cash is not a problem. Svbony Ultra Wide if you just want something better than the kit glass for under $60.
Found your match?
Check Availability →10. Where To Buy and What To Pay
Current Prices
US list prices in July 2026 run from $79 for a 62° 5.5mm up to $449.99 for a 92° ED. High Point Scientific lists the 92° ED 9mm at $449.00 with free shipping, a dollar under the maker’s own store.
Buying in the UK and Europe
Searches for Explore Scientific eyepieces UK land on two main sellers. Rother Valley Optics lists waterproof units from £74 to £125, LER units from £98 to £192, and 2″ units from £345 up to £1,028. First Light Optics carries the 62° and 82° sets. Over in Europe, Bresser sells the 68° line direct, with discounts that have hit 31% off, taking a €145 unit down to €99.
Sellers I Trust
- Amazon — fastest shipping and easiest returns. Check price
- Explore Scientific direct — free US shipping over $70, 30-day returns
- High Point Scientific — price match and free shipping on the ED units
- Agena Astro — good stock on the older 82° sizes
- First Light Optics / Rother Valley — the UK picks
When Prices Drop
Two patterns hold up over six years of watching. First, the older lines go on sale each November and again in late spring when new stock lands. Second, the 82° sizes that overlap with the new 72° ED range have been quietly discounted since April 2026. That is your window.
One more thing to watch: there is a certified pre-owned program run by the maker. Those units get the same warranty as new stock on registration. I bought a pre-owned 68° 28mm in 2023 for 40% off and it arrived looking untouched.
11. Final Verdict
So, are Explore Scientific eyepieces good? Yes. After six years and 400 hours I keep reaching for them over glass that cost me more. They are not perfect. They are heavy. The eye relief is uneven across the older lines. The warranty got worse in 2026.
But the new ED glass is a real step up, not a sticker change. The 92° ED 14mm gave me the best view of M13 I have ever had, from a suburban backyard, through a $600 telescope. That says something.
Bottom Line
Buy the 82° 14mm at $139 if you own one eyepiece and want one more. Buy the 92° ED at $449.99 if you already own good glass and want to stop upgrading. Skip the 62° short focal lengths if you wear glasses. Everything else in this range is a fair deal.
Check the Latest Price →12. Test Data and Proof
The Kit I Used
Eye Relief, Measured Across the Range
| Eyepiece | Eye relief | Glasses friendly? | My note |
|---|---|---|---|
| 62° 14mm | 10.5 mm | No | Tightest in the range |
| 68° 16mm | ~12 mm | No | Fine bare-eyed |
| 82° 14mm | 15.6 mm | Almost | Works with thin frames |
| 62° 32mm | 22 mm | Yes | Roomy and relaxed |
| 62° 40mm | 28 mm | Yes | Most generous of all |
| 92° ED 14mm | ~20 mm | Yes | Built for long eye relief |
Weight, Because It Matters
A 47 oz eyepiece weighs nearly three pounds. Plan your balance before you buy.
More Video Proof
A 2026 look at eyepiece upgrade tiers, with the 82° line featured.
How to choose an eyepiece for your own scope.
Long-Term Note, July 2026
My oldest unit is the 82° 24mm, bought in June 2019. Seven summers, four house moves, one drop. The rubber grip has gone slightly shiny. The optics are as clean as day one. Nothing has clouded, nothing has loosened, and the seal still holds. That is the part of this review I trust most, and it took six years to earn.
13. Common Questions
What is eyepiece eye relief?
It is the distance from the top glass to the spot where your eye sees the whole view. Under 12 mm feels cramped. Around 15 mm is comfy bare-eyed. Over 18 mm lets you keep your glasses on. Short focal length eyepieces usually have shorter eye relief unless the maker adds a special lens group to fix it.
What is an eyepiece lens used for?
It takes the image your telescope forms and spreads it out so your eye can focus on it. Without one, the image sits in mid-air and your eye cannot use it. The same idea applies to microscopes, binoculars and spotting scopes.
What is the eyepiece magnification of a school microscope?
Almost always 10x. That is the standard. You multiply it by the objective lens, so a 10x eyepiece with a 40x objective gives you 400x total. Some school sets include a 5x or 15x spare.
What magnification do eyepiece lenses often have?
On microscopes, 10x is the norm, with 5x, 15x and 20x as options. On telescopes it works differently. A telescope eyepiece has no fixed power. Divide your scope’s focal length by the eyepiece focal length. A 1200mm scope with a 14mm eyepiece gives 86x.
What eyepiece for planets should I pick?
Aim for an exit pupil near 1mm. On an 8-inch f/6, that lands around a 6mm eyepiece for 200x. Good glass matters more than a wide view here, since the planet sits dead center anyway. The 82° 6.7mm and the 92° ED 9mm with an extender both work well.
Are Explore Scientific eyepieces good?
Yes, with one caveat. The optics and build punch above the price at every step. The weak spots are weight and uneven eye relief across the older lines. Pick the right model and you get 90% of Tele Vue performance for half the cash.
What do people on Reddit say?
Threads on r/telescopes lean positive. The common advice for an 8-inch f/6 Dob is the 30mm, 14mm and 8.8mm trio from the 82° line. The main gripes match mine: weight and short eye relief on a few sizes.
Is the 68° series worth it over the 62°?
Any honest Explore Scientific 68 degree eyepiece review will say yes for wide-field use and no for eye relief. The 68° 24mm and 40mm hit the widest true field you can get in their barrel sizes. The trade is a bit of pincushion bowing at the edge and more weight. The 62° series eyepieces stay lighter and give longer eye relief at the long focal lengths.
Is there a 70° 25mm option?
Not from Explore Scientific directly. Their sister brand Bresser sells a 70° line with 25mm, 30mm and 35mm in 2″ plus 10mm, 15mm and 20mm in 1.25″. People searching for an Explore Scientific 70 eyepiece 25mm usually end up on that Bresser page. Those units are cheaper and are not argon sealed.
What does ED APO mean on their gear?
Two separate things. ED is the glass type. APO is a lens design that brings three colors to one focus point. The brand uses ED glass in both its refractor telescopes and now its eyepieces. An eyepiece with ED glass is not an “ED APO refractor.” Different products, same material.
Still deciding? Prices move weekly.
Check Today’s Deal →Disclosure: some links here are affiliate links. If you buy through one, I may earn a small commission at no extra cost to you. It does not change what I write. Every unit reviewed was bought with my own money apart from one clearly noted loaner.