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Eyepieces

Eyepieces are the only part of a telescope you actually look through, and they are where a modest instrument can be made to feel expensive or an expensive one made to feel disappointing. David Astro stocks eyepieces in Canada across 1.25", 2" and 3" barrels, from wide-field 82 and 100 degree designs to compact planetary orthoscopics, shipped domestically.

We help customers build sets rather than accumulate overlapping focal lengths. Tell us your telescope's aperture and focal length and typical seeing at your site, and we will suggest three or four eyepieces that cover the useful magnification range without redundancy.

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CA$46.00 - CA$46.00
CA$46.00
CA$46.00 - CA$46.00
CA$46.00

APM Illuminator for Crosshair Eyepieces

APM-FIND-ILL
Only 1 left!

Illuminator for reticle eyepiecesModelilluminated for Reticle Eyepieces

CA$46.00 - CA$46.00
CA$46.00
CA$46.00 - CA$46.00
CA$46.00
CA$107.00 - CA$107.00
CA$107.00
CA$107.00 - CA$107.00
CA$107.00

Baader Classic Ortho 10mm Eyepiece - 1.25"

BAA-2954110

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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CA$107.00 - CA$107.00
CA$107.00
CA$107.00 - CA$107.00
CA$107.00
CA$107.00 - CA$107.00
CA$107.00
CA$107.00 - CA$107.00
CA$107.00

Baader Classic Ortho 18mm Eyepiece - 1.25"

BAA-2954118
2 in stock

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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CA$107.00 - CA$107.00
CA$107.00
CA$107.00 - CA$107.00
CA$107.00
CA$107.00 - CA$107.00
CA$107.00
CA$107.00 - CA$107.00
CA$107.00

Baader Classic Ortho 6mm Eyepiece - 1.25"

BAA-2954106

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

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CA$107.00 - CA$107.00
CA$107.00
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CA$99.00 - CA$99.00
CA$99.00
CA$99.00 - CA$99.00
CA$99.00

Baader Classic Plossl 32mm Eyepiece - 1.25"

BAA-2954132

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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CA$99.00 - CA$99.00
CA$99.00
CA$99.00 - CA$99.00
CA$99.00
CA$241.00 - CA$241.00
CA$241.00
CA$241.00 - CA$241.00
CA$241.00

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

BAA-2454610
1 in stock

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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CA$241.00 - CA$241.00
CA$241.00
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CA$241.00
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CA$241.00
CA$241.00 - CA$241.00
CA$241.00

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

BAA-2454613
2 in stock

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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CA$241.00 - CA$241.00
CA$241.00
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CA$241.00
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CA$241.00
CA$241.00 - CA$241.00
CA$241.00

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

BAA-2454617

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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CA$241.00 - CA$241.00
CA$241.00
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CA$241.00
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CA$241.00
CA$241.00 - CA$241.00
CA$241.00

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

BAA-2454621
1 in stock

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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CA$241.00 - CA$241.00
CA$241.00
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CA$241.00
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CA$241.00
CA$241.00 - CA$241.00
CA$241.00

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

BAA-2454624
2 in stock

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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CA$241.00 - CA$241.00
CA$241.00
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CA$241.00
CA$241.00 - CA$241.00
CA$241.00
CA$241.00 - CA$241.00
CA$241.00

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

BAA-2454605
1 in stock

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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CA$241.00 - CA$241.00
CA$241.00
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CA$241.00
CA$241.00 - CA$241.00
CA$241.00
CA$241.00 - CA$241.00
CA$241.00

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

BAA-2454608
2 in stock

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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CA$241.00 - CA$241.00
CA$241.00
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CA$241.00
CA$1,566.00 - CA$1,566.00
CA$1,566.00
CA$1,566.00 - CA$1,566.00
CA$1,566.00

Baader Hyperion 68° Eyepiece Set

BAA-2454600

Complete set of seven focal lengths: 5, 8, 10, 13, 17, 21, and 24 mm Consistent 68° Apparent Field of View across all eyepieces 8-element / 5-grou...

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CA$1,566.00 - CA$1,566.00
CA$1,566.00
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CA$1,566.00
CA$284.00 - CA$284.00
CA$284.00
CA$284.00 - CA$284.00
CA$284.00

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

BAA-2454631
1 in stock

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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CA$284.00 - CA$284.00
CA$284.00
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CA$284.00
CA$299.00 - CA$299.00
CA$299.00
CA$299.00 - CA$299.00
CA$299.00

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

BAA-2454636
1 in stock

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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CA$299.00 - CA$299.00
CA$299.00
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CA$299.00
CA$401.00 - CA$401.00
CA$401.00
CA$401.00 - CA$401.00
CA$401.00

Baader Hyperion Universal Zoom Mark IV 8-24mm - 1.25"/2"

BAA-2454826

8mm to 24mm Stepless Zoom Focal Length Five Positive Click-Stops (8, 12, 16, 20, 24mm) 68° Apparent Field of View at 8mm 290 g, 55mm Diameter Incl...

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CA$401.00 - CA$401.00
CA$401.00
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CA$401.00
CA$532.00 - CA$532.00
CA$532.00
CA$532.00 - CA$532.00
CA$532.00

Baader Hyperion Universal Zoom Mark IV w/ 2.25x Barlow 8-24mm/3.6-10.7mm

BAA-2454827

Covers a continuous focal length range from 3.6mm to 24mm Includes the Hyperion Universal Zoom Mark IV (8-24mm) Eyepiece Includes the matched Hype...

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CA$532.00 - CA$532.00
CA$532.00
CA$532.00 - CA$532.00
CA$532.00
CA$401.00 - CA$401.00
CA$401.00
CA$401.00 - CA$401.00
CA$401.00

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

BAA-2954212
2 in stock

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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CA$401.00 - CA$401.00
CA$401.00
CA$401.00 - CA$401.00
CA$401.00
CA$401.00 - CA$401.00
CA$401.00
CA$401.00 - CA$401.00
CA$401.00

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

BAA-2954214
2 in stock

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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CA$401.00 - CA$401.00
CA$401.00
CA$401.00 - CA$401.00
CA$401.00
CA$401.00 - CA$401.00
CA$401.00
CA$401.00 - CA$401.00
CA$401.00

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

BAA-2954217
1 in stock

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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CA$401.00 - CA$401.00
CA$401.00
CA$401.00 - CA$401.00
CA$401.00
CA$401.00 - CA$401.00
CA$401.00
CA$401.00 - CA$401.00
CA$401.00

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

BAA-2954204
3 in stock

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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CA$401.00 - CA$401.00
CA$401.00
CA$401.00 - CA$401.00
CA$401.00
CA$401.00 - CA$401.00
CA$401.00
CA$401.00 - CA$401.00
CA$401.00

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

BAA-2954206

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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CA$401.00 - CA$401.00
CA$401.00
CA$401.00 - CA$401.00
CA$401.00
CA$401.00 - CA$401.00
CA$401.00
CA$401.00 - CA$401.00
CA$401.00

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

BAA-2954209
1 in stock

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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CA$401.00 - CA$401.00
CA$401.00
CA$401.00 - CA$401.00
CA$401.00
CA$2,374.00 - CA$2,374.00
CA$2,374.00
CA$2,374.00 - CA$2,374.00
CA$2,374.00

Baader Morpheus Complete Eyepiece Set

BAA-2954200

Complete set of six wide-field eyepieces: 4.5mm, 6.5mm, 9mm, 12.5mm, 14mm, and 17.5mm 76° apparent field of view with a flat field 8-element, 5-gr...

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CA$2,374.00 - CA$2,374.00
CA$2,374.00
CA$2,374.00 - CA$2,374.00
CA$2,374.00

How to Choose Eyepiece Focal Lengths

Magnification is your telescope's focal length divided by the eyepiece's. Exit pupil — eyepiece focal length divided by focal ratio — determines how bright and comfortable the view is, and it is the number that actually sets the useful range.

  • Low power, 5 to 7 mm exit pupil: Widest true field for large nebulae, star fields and finding targets. Above 7 mm your eye's pupil clips the beam and you waste aperture.
  • Medium power, 2 to 3 mm exit pupil: The workhorse range for most deep-sky observing, balancing image scale against background darkness.
  • High power, 0.7 to 1 mm exit pupil: Planetary, lunar and double star work. Canadian seeing usually caps useful magnification well below the theoretical limit.
  • Apparent field of view: 50 degree designs are compact and inexpensive; 82 and 100 degree designs give an immersive view and much longer tracking time in an undriven Dobsonian.
  • Eye relief: Eyeglass wearers need roughly 15 mm or more. Short focal length simple designs often have very little, which makes them uncomfortable regardless of optical quality.
  • Barrel size: 2" barrels are needed for long focal length wide-field eyepieces; 1.25" covers everything from medium to high power.

Why Choose David Astro for Eyepieces

An eyepiece recommendation is only useful if it accounts for the telescope it will be used in and the sky it will be used under.

  • Set planning, not single sales: We space focal lengths so each step is a meaningful jump, typically by a factor of roughly 1.4 to 1.5, instead of selling you two eyepieces that give nearly the same view.
  • Focal ratio honesty: Below f/5, simple designs show edge aberrations that no coating fixes. We say so, and we also say when a premium eyepiece will not visibly improve a slow telescope.
  • Exit pupil calculated for you: We work out the useful range for your specific aperture and focal length rather than quoting general rules.
  • Authorized dealer: Genuine eyepieces with manufacturer warranty, in stock here and shipped without customs delays for Canadian buyers.
  • Domestic shipping: Ships from Canada with no duties or brokerage fees for Canadian orders.

Eyepieces in Canada — Frequently Asked Questions

How many eyepieces do I actually need?
Three or four covers almost everything: a low power for finding and wide fields, one or two medium powers for deep sky, and one high power for planets. A good Barlow can substitute for one of them.
Are 100 degree eyepieces worth the price?
In an undriven Dobsonian, very much so — objects stay in the field far longer and the view is immersive. On a tracking mount at medium power the advantage is real but smaller, and the weight can upset balance.
What is the highest magnification I can use?
Optically, roughly twice the aperture in millimetres. Practically, Canadian seeing limits most nights to 150 to 250x regardless of aperture, and pushing past that gives a larger, softer image rather than more detail.
Do I need 2 inch eyepieces?
Only for long focal length wide-field views. If your telescope's maximum true field is already limited by a 1.25 inch barrel and you want more, a 2 inch focuser and eyepiece is the way to get it.

Building an eyepiece set?

Tell us your telescope and observing site and we will map out a complete set. Authorized dealer, Canadian stock.