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Fixed Focal Length Eyepieces

A fixed focal length eyepiece is still the best way to get the sharpest, most contrasty view from a telescope. We carry the full Tele Vue line (Plössl, DeLite, Delos, Panoptic, Nagler and Ethos), Explore Scientific 52° to 120° series, Baader Morpheus, Hyperion and Classic Ortho, Celestron Luminos, X-Cel LX and Ultima Edge, SVBONY and more, in 1.25-inch, 2-inch and dual-barrel formats.

Three numbers decide which eyepiece suits you: focal length, apparent field of view and eye relief. Get those right for your telescope and your eyes, and brand becomes a question of polish and budget.

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APM Illuminator for Crosshair Eyepieces

Illuminator for reticle eyepiecesModelilluminated for Reticle Eyepieces

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Baader Classic Ortho 10mm Eyepiece - 1.25"

10mm Focal Length 52° Apparent Field of View Classic 4-Element Orthoscopic Design HT Multi-Coated Optics Safe for Solar Projection 1.25" Barrel ...

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Baader Classic Ortho 18mm Eyepiece - 1.25"

18mm Focal Length 52° Apparent Field of View Classic 4-Element Orthoscopic Design 1.25" Barrel Diameter Engineered for Safe Solar Projection HT Mu...

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Baader Classic Ortho 6mm Eyepiece - 1.25"

Classic Orthoscopic Optical Design 6mm Focal Length for High Magnification Optimized for High-Contrast Planetary Viewing Safe for Solar Projection...

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Baader Classic Plossl 32mm Eyepiece - 1.25"

32mm Focal Length 1.25" Barrel Diameter HT Multi-Coated Optics Optimized for Maximum True Field of View Heat-Resistant Cement for Solar Projection...

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Baader Hyperion 68° 10mm Eyepiece - 1.25"/2"

10mm Focal Length 68° Apparent Field of View Modular Dual 1.25" and 2" Barrel Design 8 Lens Elements in 5 Groups Baader Phantom Group Multi-Coatin...

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Baader Hyperion 68° 13mm Eyepiece - 1.25"/2"

13mm Focal Length 68° Apparent Field of View Dual 1.25" and 2" Barrel Design 8 Lens Elements in 5 Groups 20mm Eye Relief Integrated M43 and SP54 C...

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Baader Hyperion 68° 17mm Eyepiece - 1.25"/2"

17mm Focal Length 68° Apparent Field of View 20mm Eye Relief Dual 1.25" and 2" Barrel Design Baader Phantom Coating® Group Multi-Coatings Integrat...

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Baader Hyperion 68° 21mm Eyepiece - 1.25"/2"

21mm Focal Length 68° Apparent Field of View Dual 1.25" and 2" Barrel Design 20mm Eye Relief M43 and SP54 Photographic Threads Baader Phantom Grou...

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Baader Hyperion 68° 24mm Eyepiece - 1.25"/2"

24mm Focal Length 68° Apparent Field of View Dual 1.25" and 2" Barrel Design Baader Phantom Group Multi-Coatings 17mm Eye Relief M43 and SP54 Came...

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Baader Hyperion 68° 5mm Modular Eyepiece - 1.25" & 2"

5mm Focal Length for High-Magnification Viewing 68° Apparent Field of View Dual 1.25" and 2" Barrels Modular Design Allows Focal Lengths Down to 2...

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Baader Hyperion 68° 8mm Eyepiece - 1.25"/2"

8mm Focal Length 68° Apparent Field of View Dual 1.25" and 2" Barrel Design 20mm Long Eye Relief Modular Design with M43 and SP54 Camera Threads 8...

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Baader Hyperion Aspheric 72° 31mm Eyepiece - 1.25"/2"

31mm Focal Length 72° Apparent Field of View (in 2" mode) Aspheric Optical Design with 6 Lens Elements Dual 1.25" and 2" Barrel Design 17mm Eye Re...

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Baader Hyperion Aspheric 72° 36mm Eyepiece - 1.25"/2"

36mm Focal Length 72° Apparent Field of View (in 2" barrel) Aspheric Optical Design with 6 Elements Dual 1.25" and 2" Barrels Baader Pha...

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Baader Morpheus 76° Eyepiece 12.5mm - 1.25"/2"

12.5mm Focal Length 76° Apparent Field of View Dual 1.25" and 2" Barrels 20mm Long Eye Relief M43 Photo-Video Threads for Imaging 8-Element / 5-Gr...

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Baader Morpheus 76° Eyepiece 14mm - 1.25"/2"

14mm Focal Length 76° Apparent Field of View Dual 1.25" and 2" Barrels 18.5mm Eye Relief 8-Element Optical Design M43 Photo-Video Adapter Thread ...

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Baader Morpheus 76° Eyepiece 17.5mm - 1.25"/2"

17.5mm Focal Length 76° Apparent Field of View 23mm Long Eye Relief Dual 1.25" and 2" Barrels 8-Lens Optical Design with ED & Lanthanum Glass ...

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Baader Morpheus 76° Eyepiece 4.5mm - 1.25"/2"

4.5mm Focal Length 76° Apparent Field of View Dual 1.25" and 2" Barrels 17.5mm Eye Relief 55mm Body Diameter for Binoviewing M43 Thread for Photo-...

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Baader Morpheus 76° Eyepiece 6.5mm - 1.25"/2"

6.5mm Focal Length 76° Apparent Field of View Dual 1.25" and 2" Barrels 18.5mm Eye Relief 55mm Body Optimized for Binoviewing M43 Photo-Video Adap...

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Baader Morpheus 76° Eyepiece 9mm - 1.25"/2"

9mm Focal Length 76° Apparent Field of View Dual 1.25" and 2" Barrels 21mm Long Eye Relief M43 Thread for Photo-Video Adaptation Optimized for Bin...

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Baader Polaris I – Measuring and Guiding-25mm Illuminated Eyepiece - T-2

25mm Focal Length Illuminated Measuring and Guiding Reticle Direct T-2 Thread Connection Specialized for Manual Guiding Ideal for Precise Polar Al...

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Baader Winged Eyeshield for Hyperion and Aspheric Eyepieces (covers M43 Thread)

Blocks stray light for improved contrast Winged design shields eye from ambient light Comfortable for long observing sessions Attaches via the M43...

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Celestron Luminos 10 mm - 1.25"

82° Apparent Field of View 10mm Focal Length for High-Magnification Views 7-Element Fully Multi-Coated Optics Parfocal with all Luminos Eyepieces ...

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Celestron Luminos 15 mm - 1.25"

82° Apparent Field of View 15mm Focal Length 1.25" Barrel Size 17mm Eye Relief for Viewing Comfort Parfocal with all Luminos Eyepieces 7-Element F...

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Apparent Field of View

  • 50 to 55°: Plössls and orthoscopics. Sharp, simple designs, excellent on planets and double stars.
  • 60 to 72°: DeLite, Delos, Morpheus, Hyperion, X-Cel LX. Comfortable fields with good eye relief.
  • 82°: Nagler, Explore Scientific 82°, Luminos. The classic 'spacewalk' feel, great in Dobsonians.
  • 100 to 120°: Ethos and Explore Scientific 100° and 120°. Immersive views that reduce how often you nudge a manual telescope.

Eye Relief and Comfort

  • With glasses: Look for 17 mm of eye relief or more. Tele Vue DeLite and Delos give 20 mm.
  • Cold weather: Larger eye lenses and adjustable eyeguards help when you are bundled up at minus 20.
  • Weight: Large 2-inch eyepieces can weigh 1 kg and unbalance a small Dobsonian. Plan for counterweights.

Eyepieces: Frequently Asked Questions

Which eyepiece focal lengths should I buy first?

For most telescopes: one for about a 5 mm exit pupil, one for about 2 mm, and one for about 1 mm. Divide focal length by focal ratio to get the exit pupil.

Do I need 2-inch eyepieces?

Only for the lowest powers and widest fields. Most medium and high-power eyepieces are 1.25-inch.

Why do some eyepieces show blurry edges?

Fast telescopes, below about f/6, are hard on eyepieces. Premium designs and a coma corrector on Newtonians fix it.

Choosing your next eyepiece?

Tell us your telescope, focal ratio and whether you wear glasses. We will recommend focal lengths and a series.