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Closed October 10–12 for Thanksgiving weekend
Closed October 10–12 for Thanksgiving weekend

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$162.00 - CA$162.00
CA$162.00
CA$162.00 - CA$162.00
CA$162.00

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

BAA-2954325
2 in stock

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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CA$162.00 - CA$162.00
CA$162.00
CA$162.00 - CA$162.00
CA$162.00
CA$408.00 - CA$408.00
CA$408.00
CA$408.00 - CA$408.00
CA$408.00

Baader Q-Turret Eyepiece Set

BAA-2957000
1 in stock

Four-position eyepiece revolver for rapid magnification changes Includes 6mm, 10mm, and 18mm Classic Orthoscopic eyepieces Includes a 32mm Plössl ...

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CA$408.00 - CA$408.00
CA$408.00
CA$408.00 - CA$408.00
CA$408.00
CA$21.00 - CA$21.00
CA$21.00
CA$21.00 - CA$21.00
CA$21.00

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

BAA-2454653

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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CA$21.00 - CA$21.00
CA$21.00
CA$21.00 - CA$21.00
CA$21.00
CA$21.00 - CA$21.00
CA$21.00
CA$21.00 - CA$21.00
CA$21.00

Baader Winged Eyeshield for Hyperion Zoom Mark III - Covers M43 Thread

BAA-2454654

Blocks stray light to increase image contrast Comfortable winged design for focused observing Threads directly onto the M43 connection of the Hype...

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CA$21.00 - CA$21.00
CA$21.00
CA$21.00 - CA$21.00
CA$21.00
CA$334.00 - CA$334.00
CA$334.00
CA$334.00 - CA$334.00
CA$334.00

Celestron 1.25" Eyepiece and Filter Kit

CEL-94303

5 Plossl Eyepieces (6mm, 8mm, 13mm, 17mm, 32mm) 2X Barlow Lens Doubles Magnification 7 Planetary and Moon Filters 52° Apparent Field of View Fully...

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CA$334.00 - CA$334.00
CA$334.00
CA$334.00 - CA$334.00
CA$334.00
CA$584.00 - CA$584.00
CA$584.00
CA$584.00 - CA$584.00
CA$584.00

Celestron 2" Eyepiece and Filter Kit

CEL-94305

Three 2" E-Lux Eyepieces (40mm, 32mm, 26mm) 56° Apparent Field of View (50° for 40mm) 2X Barlow Lens Doubles Magnification of any 2" Eyepiece Five...

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CA$584.00 - CA$584.00
CA$584.00
CA$584.00 - CA$584.00
CA$584.00
CA$150.00 - CA$150.00
CA$150.00
CA$150.00 - CA$150.00
CA$150.00

Celestron 8-24mm Zoom Eyepiece - 1.25"

CEL-93230
1 in stock

Focal Length Range: 8mm to 24mm Apparent Field of View: 40° to 60° Barrel Size: 1.25" (32mm) 6-Element, Fully Multi-Coated Optics Weight: 7.94 oz ...

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CA$150.00 - CA$150.00
CA$150.00
CA$150.00 - CA$150.00
CA$150.00
CA$125.00 - CA$125.00
CA$125.00
CA$125.00 - CA$125.00
CA$125.00

Celestron AstroMaster Accessory Kit

CEL-94307

Includes 2 eyepieces: 15mm Kellner & 6mm Plössl 2X Barlow lens doubles the magnification of any 1.25" eyepiece 3 filters included: #80A Blue, ...

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CA$125.00 - CA$125.00
CA$125.00
CA$125.00 - CA$125.00
CA$125.00
Sold out
CA$146.00 - CA$146.00
CA$146.00
CA$146.00 - CA$146.00
CA$146.00

Celestron CrossAim 12.5mm Reticle Eyepiece - 1.25"

CEL-93235

12.5mm Focal Length 40° Apparent Field of View Illuminated Double Crosshair Reticle Adjustable Red LED Brightness 1.25" Barrel Format Descripti...

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CA$146.00 - CA$146.00
CA$146.00
CA$146.00 - CA$146.00
CA$146.00
Sold out
CA$42.00 - CA$42.00
CA$42.00
CA$42.00 - CA$42.00
CA$42.00

Celestron FirstScope Accessory Kit

CEL-21024-ACC

5x24 finderscope for easy object location 12.5mm eyepiece provides 24x magnification 6mm eyepiece boosts magnification to 50x 1.25" Moon Filter re...

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CA$42.00 - CA$42.00
CA$42.00
CA$42.00 - CA$42.00
CA$42.00
CA$195.00 - CA$195.00
CA$195.00
CA$195.00 - CA$195.00
CA$195.00

Celestron Luminos 10 mm - 1.25"

CEL-93431

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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CA$195.00 - CA$195.00
CA$195.00
CA$195.00 - CA$195.00
CA$195.00
CA$195.00 - CA$195.00
CA$195.00
CA$195.00 - CA$195.00
CA$195.00

Celestron Luminos 15 mm - 1.25"

CEL-93432

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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CA$195.00 - CA$195.00
CA$195.00
CA$195.00 - CA$195.00
CA$195.00
CA$278.00 - CA$278.00
CA$278.00
CA$278.00 - CA$278.00
CA$278.00

Celestron Luminos 19 mm - 2"

CEL-93433
1 in stock

82° Apparent Field of View 19mm Focal Length in a 2" Barrel 6-Element Fully Multi-Coated Optics Generous 20mm Eye Relief Parfocal with all Luminos...

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CA$278.00 - CA$278.00
CA$278.00
CA$278.00 - CA$278.00
CA$278.00
CA$347.00 - CA$347.00
CA$347.00
CA$347.00 - CA$347.00
CA$347.00

Celestron Luminos 23 mm - 2"

CEL-93434
1 in stock

23mm Focal Length for Medium-Low Power Wide Views 82° Apparent Field of View 2" Barrel Diameter 20mm Eye Relief for Viewing Comfort 6-Element Opti...

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CA$347.00 - CA$347.00
CA$347.00
CA$347.00 - CA$347.00
CA$347.00
CA$417.00 - CA$417.00
CA$417.00
CA$417.00 - CA$417.00
CA$417.00

Celestron Luminos 31 mm - 2"

CEL-93435

82° Apparent Field of View 31mm Focal Length 2" Barrel Size 27mm Eye Relief Parfocal with other Luminos eyepieces Pop-up Adjustable Eyeguard De...

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CA$417.00 - CA$417.00
CA$417.00
CA$417.00 - CA$417.00
CA$417.00
CA$195.00 - CA$195.00
CA$195.00
CA$195.00 - CA$195.00
CA$195.00

Celestron Luminos 7 mm - 1.25"

CEL-93430

7mm Focal Length for High-Magnification Views Expansive 82° Apparent Field of View Fully Multi-Coated 8-Element Optics Parfocal with all Luminos E...

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CA$195.00 - CA$195.00
CA$195.00
CA$195.00 - CA$195.00
CA$195.00
CA$222.00 - CA$222.00
CA$222.00
CA$222.00 - CA$222.00
CA$222.00

Celestron Observer's Accessory Kit

CEL-94308

Includes 17mm and 6mm 1.25" Plössl Eyepieces 2x Barlow Lens Doubles the Magnification of Any 1.25" Eyepiece Three Filters Included: #80A Blue, #25...

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CA$222.00 - CA$222.00
CA$222.00
CA$222.00 - CA$222.00
CA$222.00
CA$44.00 - CA$44.00
CA$44.00
CA$44.00 - CA$44.00
CA$44.00

Celestron Omni 12 mm - 1.25"

CEL-93319
5 in stock

12mm Focal Length for Medium-High Magnification 4-Element Plössl Optical Design 50° Apparent Field of View Accepts Standard 1.25" Filters 8mm Eye ...

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CA$44.00 - CA$44.00
CA$44.00
CA$44.00 - CA$44.00
CA$44.00
CA$44.00 - CA$44.00
CA$44.00
CA$44.00 - CA$44.00
CA$44.00

Celestron Omni 15 mm - 1.25"

CEL-93320

15mm Focal Length Plössl Eyepiece 50° Apparent Field of View 1.25" Barrel Diameter 4-Element, Multi-Coated Optics 13mm Eye Relief Standard 1.25" F...

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CA$44.00 - CA$44.00
CA$44.00
CA$44.00 - CA$44.00
CA$44.00
CA$74.00 - CA$74.00
CA$74.00
CA$74.00 - CA$74.00
CA$74.00

Celestron Omni 32 mm - 1.25"

CEL-93323
1 in stock

32mm Plössl eyepiece provides maximum true field of view in a 1.25" barrel 4-element optical design with multi-coated surfaces for bright, clear i...

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CA$74.00 - CA$74.00
CA$74.00
CA$74.00 - CA$74.00
CA$74.00
CA$44.00 - CA$44.00
CA$44.00
CA$44.00 - CA$44.00
CA$44.00

Celestron Omni 4 mm - 1.25"

CEL-93316

4mm Focal Length for High-Power Planetary Viewing 4-Element Plössl Optical Design 50° Apparent Field of View Multi-Coated Optics for High Contrast...

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CA$44.00 - CA$44.00
CA$44.00
CA$44.00 - CA$44.00
CA$44.00
CA$74.00 - CA$74.00
CA$74.00
CA$74.00 - CA$74.00
CA$74.00

Celestron Omni 40 mm - 1.25"

CEL-93325
1 in stock

40mm Plössl eyepiece for low-power, wide-field views 4-element optical design with multi-coated lenses for clarity 40° apparent field of view Gene...

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CA$74.00 - CA$74.00
CA$74.00
CA$74.00 - CA$74.00
CA$74.00
CA$181.00 - CA$181.00
CA$181.00
CA$181.00 - CA$181.00
CA$181.00

Celestron Omni 56mm - 2"

CEL-93328
1 in stock

56mm focal length provides the lowest power for any given telescope 47° apparent field of view delivers expansive celestial vistas Utilizes a 46mm...

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CA$181.00 - CA$181.00
CA$181.00
CA$181.00 - CA$181.00
CA$181.00
CA$44.00 - CA$44.00
CA$44.00
CA$44.00 - CA$44.00
CA$44.00

Celestron Omni 6 mm - 1.25"

CEL-93317

6mm Focal Length for High Magnification 4-Element Symmetrical Plössl Design 50° Apparent Field of View Multi-Coated Optics with Blackened Edges 1....

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CA$44.00 - CA$44.00
CA$44.00
CA$44.00 - CA$44.00
CA$44.00

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.