Tele Vue

Tele Vue Plössl 8mm

A 8mm Tele Vue Plössl: a medium-high-power eyepiece for planets, globular cores and small planetary nebulae, from the reference Plössl, the four-element design executed to the standard every other Plössl is judged against.

71/ 100

Polaris Score

Optical quality · Immersion · Comfort · Value

See the breakdown ↓

What it's for

Low power · wide fieldHigh power · narrow field

Medium-high power. At 8mm this is a medium-high-power eyepiece for planets, globular cores and small planetary nebulae; it is not meant for framing large deep-sky objects.

Apparent Field

50°

Barrel Size

1.25"

Eye Relief

6mm

Focal Length

8mm

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The spacewalk

You don’t look at a field.
You look into the sky.

Every number on the spec sheet matters less than one feeling: how much sky wraps around your eye. Widen the apparent field and watch the black edge of the eyepiece slip away.

50° apparent field

At 50°, you are aware of the field edge, like looking down a short, comfortable tube.

See this field in your own scope in the Simulator →

01What it's good at

What it's best at — and the trade-offs.

Best at

✓Reference-grade on-axis sharpness and contrast: the Plössl done exactly right.

✓At 8mm it lands squarely in medium-high power territory, exactly where planetary and lunar detail lives.

Trade-offs

!Short eye relief below about 12mm, the unavoidable Plössl compromise.

!A 50-degree field is narrow next to modern wide-fields.

!You pay a real premium over a budget Plössl for build and coatings, not extra field.

02In your telescope

One eyepiece. A different job in every scope.

An eyepiece has no magnification of its own — the telescope decides. The same eyepiece becomes 60× and 50′ of sky in a little refractor, or 254× and a tight frame in a long SCT. Here’s what it does across common scopes.

Small apo refractor

480 mm · f/5.5

Magnification

60×

True field

50′

Exit pupil

1.5 mm

60× across a 50′ field at a 1.5mm exit pupil, crisp medium power for galaxies, clusters and planetary nebulae.

8-inch Dobsonian

1200 mm · f/6

Magnification

150×

True field

20′

Exit pupil

1.3 mm

150× across a 20′ field at a 1.3mm exit pupil, crisp medium power for galaxies, clusters and planetary nebulae.

12-inch Dobsonian

1500 mm · f/5

Magnification

188×

True field

16′

Exit pupil

1.6 mm

188× across a 16′ field at a 1.6mm exit pupil, crisp medium power for galaxies, clusters and planetary nebulae.

8-inch SCT

2032 mm · f/10

Magnification

254×

True field

12′

Exit pupil

0.8 mm

254× across a 12′ field at a 0.8mm exit pupil, high power for planets, the Moon and tight doubles.

Exit pupil is how wide the beam of light leaving the eyepiece is. Around 5–6 mm is bright and immersive under dark skies; push much past 6 mm and you waste light, and under light pollution a smaller exit pupil shows more contrast.

02In plain English

The numbers, in plain English.

Focal lengthHigh power

8mm

About 150x in an 8 inch f/5.9 Dobsonian and 254x in an 8 inch SCT. A strong planetary and double-star power, and the range where a simple four-element design gives away nothing to complex eyepieces on sharpness.

Apparent fieldClassic

50°

The traditional Plössl field. Modest by modern standards, but few elements mean very little scattered light, so contrast on the Moon and planets is excellent. In a manual telescope you will nudge often at this power.

Eye reliefVery tight

6mm

Six millimetres puts your eye almost against the lens, because Plössl eye relief scales with focal length and there is no way around that geometry. Glasses are impossible; many observers use a longer Plössl with a Barlow instead.

BarrelStandard

1.25"

Fits any focuser or diagonal, and the eyepiece is small and light enough to carry a whole set in a coat pocket.

OpticsReference simple design

Fully multi-coated

Four elements, fully multi-coated, made to a standard that has kept this design in production for decades. On axis it is as sharp as anything; what you give up is field width and eye comfort, not image quality.

03What comes alive

The targets this eyepiece was born for.

Comes alive

Jupiter and its moons

Belt detail with room to watch the Galilean moons shift.

Comes alive

Saturn

Rings, the Cassini gap, and Titan in the same field.

Excellent

The Moon

A high-power tour of rilles, domes and crater chains.

Excellent

M13 globular cluster

The core starts to resolve into a spray of suns.

Comes alive

The Ring and Cat’s Eye nebulae

Small planetary nebulae take real magnification well.

Excellent

Double stars

Clean, contrasty splits of colorful pairs.

04Role in a collection

Where it sits in your eyepiece case.

A good eyepiece collection isn’t a pile of glass — it’s two or three focal lengths that hand off from wide to tight. This is the anchor at the bottom of the ladder: the one you find and frame with. You buy it once, and it stays your low-power eyepiece for life.

32 mm

Low power · wide field

Find, frame and sweep. Your widest true field and the lowest useful magnification, the eyepiece you reach for first.

Veil Nebula · Pleiades · Milky Way star clouds

13 mm

Medium power · the workhorse

Where most deep-sky objects look their best, galaxies, globulars and planetary nebulae at a comfortable scale.

M13 · Ring Nebula · most galaxies

8 mmThis one

High power · detail

Planets, the Moon at the terminator, tight double stars and the smallest planetary nebulae. Steady-air nights only.

Jupiter · Saturn · lunar craters

04Build around it

What it pairs with.

The telescope

What it goes into

Any 1.25-inch focuser

Fits essentially every telescope made.

Longer focal length scopes reward it

The higher the scope’s focal length, the more planetary scale you get from this eyepiece.

Pair it

What extends its range

A low-power finder eyepiece (~13mm)

Use the long eyepiece to locate and frame, then drop in this one for detail.

Filter it

What transforms the view

A neutral-density Moon filter

Tames the glare of a bright gibbous Moon at high power so detail returns.

02The Polaris Score

How it scores, and why.

71/ 100

Tele Vue Plössl 8mm

Judged as a medium-high-power eyepiece for planets, globular cores and small planetary nebulae, it earns its score on reference-grade on-axis sharpness and contrast: the plössl done exactly right. Tighter eye relief at this focal length is the main thing holding it back. It is honest about being a specialist, not an all-rounder.

Optical quality

Immersion

Comfort

Value

Polaris weighs how well the eyepiece does the job it was designed for — optics, immersion, comfort and value — never list price or brand.

03Who it's for

An honest fit check.

Buy it if you

✓Observers who want a medium-high-power eyepiece for planets, globular cores and small planetary nebulae.

✓Observers happy to take their glasses off at the eyepiece.

✓Observers who value on-axis contrast over a sprawling field.

Look elsewhere if you

!Anyone who has looked through a wide-field eyepiece and cannot go back to a 52-degree tunnel.

!Eyeglass wearers, who will not comfortably reach the full field at this focal length.

!Anyone hoping to frame large nebulae; that is a job for a low-power eyepiece.

05The numbers

Full specifications.

Optical

Focal Length8mm

Apparent Field50°

Comfort & handling

Eye Relief6mm

Fit & build

Barrel Size1.25"

Editor’s Take

Point it at a planet on a steady night and the case makes itself. This is where the Plössl earns its keep.

— The Skynocular verdict

06Alternatives

For a different goal, start here.

Wider, lower power

Tele Vue Plössl 13mm

The same optics with more true field, for framing larger objects and finding your way around.

More magnification

Tele Vue Plössl 5mm

The same line at higher power, for planets and the smallest deep-sky detail.

Cross-shop

Tele Vue Delos

A natural alternative at a similar price point, if you want to compare field and feel before committing.

→

Tele Vue Plössl 8mm

You don’t look at a field.You look into the sky.

What it's best at — and the trade-offs.

One eyepiece. A different job in every scope.

The numbers, in plain English.

The targets this eyepiece was born for.

Where it sits in your eyepiece case.

What it pairs with.

How it scores, and why.

An honest fit check.

Full specifications.

For a different goal, start here.

You don’t look at a field.
You look into the sky.