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Optical Accessories

Optical accessories are what turn one telescope into several. The same optical tube can be a wide-field imaging refractor, a high-power planetary instrument or a comfortable binocular-view visual scope depending on what you put behind it. David Astro carries a deep selection of eyepieces, diagonals, Barlows, reducers, flatteners, binoviewers and correctors in Canada, held in Canadian stock.

Our team uses this equipment on our own telescopes, so the advice you get is based on what actually works at a given focal ratio and under a given sky, not on a spec sheet. If you are deciding between two focal lengths or wondering whether a corrector will help your optic, ask us before you order.

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CA$436.00 - CA$436.00
CA$436.00
CA$436.00 - CA$436.00
CA$436.00

Tele Vue Panoptic 19mm 68° Eyepiece - 1.25"

TV-EPN-19.0
1 in stock

19mm Focal Length 68° Apparent Field of View 1.25" Diameter Barrel 13mm Eye Relief 21.3mm Field Stop Description FAQ Specifications In the Box ...

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CA$436.00 - CA$436.00
CA$436.00
CA$436.00 - CA$436.00
CA$436.00
CA$558.00 - CA$558.00
CA$558.00
CA$558.00 - CA$558.00
CA$558.00

Tele Vue Panoptic 24mm 68° Eyepiece - 1.25"

TV-EPN-24.0

24mm Focal Length 68° Apparent Field of View 1.25" Diameter Barrel 15mm Eye Relief 27mm Field Stop Description FAQ Specifications In the Box Do...

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CA$558.00 - CA$558.00
CA$558.00
CA$558.00 - CA$558.00
CA$558.00
CA$604.00 - CA$604.00
CA$604.00
CA$604.00 - CA$604.00
CA$604.00

Tele Vue Panoptic 27mm 68° Eyepiece - 2"

TV-EPN-27.0

27mm Focal Length 68° Apparent Field of View 2" Diameter Barrel 19mm Eye Relief 30.5mm Field Stop Description FAQ Specifications In the Box Dow...

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CA$604.00 - CA$604.00
CA$604.00
CA$604.00 - CA$604.00
CA$604.00
CA$679.00 - CA$679.00
CA$679.00
CA$679.00 - CA$679.00
CA$679.00

Tele Vue Panoptic 35mm 68° Eyepiece - 2"

TV-EPN-35.0
1 in stock

35mm Focal Length 68° Apparent Field of View 2" Diameter Barrel 24mm Eye Relief 38.7mm Field Stop Description FAQ Specifications In the Box Dow...

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CA$679.00 - CA$679.00
CA$679.00
CA$679.00 - CA$679.00
CA$679.00
CA$915.00 - CA$915.00
CA$915.00
CA$915.00 - CA$915.00
CA$915.00

Tele Vue Panoptic 41mm 68° Eyepiece - 2"

TV-EPN-41.0

41mm Focal Length 68° Apparent Field of View 2" Diameter Barrel 27mm Eye Relief 46mm Field Stop Description FAQ Specifications In the Box Downl...

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CA$915.00 - CA$915.00
CA$915.00
CA$915.00 - CA$915.00
CA$915.00
Tele Vue Paracorr Type 2 2
Tele Vue Paracorr Type 2 1
CA$808.00 - CA$808.00
CA$808.00
CA$808.00 - CA$808.00
CA$808.00

Tele Vue Paracorr Type 2

TV-VIP-2010
1 in stock

Corrects Coma in Fast Newtonian Reflectors For f-ratios as fast as f/3 1.15x Magnification Factor Adjustable "Tunable Top" for Eyepiece Optimizati...

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CA$808.00 - CA$808.00
CA$808.00
CA$808.00 - CA$808.00
CA$808.00
CA$74.00 - CA$74.00
CA$74.00
CA$74.00 - CA$74.00
CA$74.00

Tele Vue Quick Release Bracket

TV-QRB-1002
1 in stock

Mounts to the channels in Tele Vue ring mounts and mount rings Accepts Starbeam (with QRD-1006 dovetail) and Vixen, Orion and Sky-Watcher stalk fi...

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CA$74.00 - CA$74.00
CA$74.00
CA$74.00 - CA$74.00
CA$74.00
Tele Vue Quick Release Universal Finder Mount 1
CA$231.00 - CA$231.00
CA$231.00
CA$231.00 - CA$231.00
CA$231.00

Tele Vue Quick Release Universal Finder Mount

TV-QFM-1008

Mechanism: Quick-Release Dovetail System Compatibility: Fits Tele Vue, Sol-Searcher, Starbeam, and many third-party finders Mounting: Base mounts ...

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CA$231.00 - CA$231.00
CA$231.00
CA$231.00 - CA$231.00
CA$231.00
Tele Vue SCT bracket 1
CA$55.00 - CA$55.00
CA$55.00
CA$55.00 - CA$55.00
CA$55.00

Tele Vue SCT bracket

TV-SAB-1001

Compatibility: Most Celestron and Meade SCTs (8" and larger) Material: Black Anodized Aluminum Mounting Pattern: Attaches to rear cell screw holes...

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CA$55.00 - CA$55.00
CA$55.00
CA$55.00 - CA$55.00
CA$55.00
Tele Vue Starbeam Bar for SCT Bracket 1
CA$50.00 - CA$50.00
CA$50.00
CA$50.00 - CA$50.00
CA$50.00

Tele Vue Starbeam Bar for SCT Bracket

TV-SBB-1002

Attaches Starbeam finder to Tele Vue SCT Bracket (SAB-1001) Material: Black Anodized Aluminum Includes mounting hardware Designed for Schmidt-Cass...

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CA$50.00 - CA$50.00
CA$50.00
CA$50.00 - CA$50.00
CA$50.00
Tele Vue TV-60 60° Accessory Package 1
CA$748.00 - CA$748.00
CA$748.00
CA$748.00 - CA$748.00
CA$748.00

Tele Vue TV-60 60° Accessory Package

TV-TVP-6012

For the Tele Vue TV-60 (telescope not included) Qwik-Point Basic Finder (QBT-1006) 1.25" 60° Everbrite Diagonal (DPC-6012) TV-60 Carry Bag (TVB-24...

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CA$748.00 - CA$748.00
CA$748.00
CA$748.00 - CA$748.00
CA$748.00
Tele Vue TV-60 90° Accessory Package 1
CA$696.00 - CA$696.00
CA$696.00
CA$696.00 - CA$696.00
CA$696.00

Tele Vue TV-60 90° Accessory Package

TV-TVP-1250

For the Tele Vue TV-60 (telescope not included) Qwik-Point Basic Finder (QBT-1006) 1.25" 90° Everbrite Diagonal (DPC-1250) TV-60 Carry Bag (TVB-24...

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CA$696.00 - CA$696.00
CA$696.00
CA$696.00 - CA$696.00
CA$696.00
Tele Vue TV-60 X-Y Mount kit SCT 2
Tele Vue TV-60 X-Y Mount kit SCT 1
CA$237.00 - CA$237.00
CA$237.00
CA$237.00 - CA$237.00
CA$237.00

Tele Vue TV-60 X-Y Mount kit SCT

TV-AAC-0002

Mechanism: Independent X-Y axis adjustment knobs Primary Payload: Tele Vue TV-60 Telescope Telescope Compatibility: Schmidt-Cassegrain Telescope (...

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CA$237.00 - CA$237.00
CA$237.00
CA$237.00 - CA$237.00
CA$237.00
Tele Vue TV-76 Accessory Package 1
CA$1,078.00 - CA$1,078.00
CA$1,078.00
CA$1,078.00 - CA$1,078.00
CA$1,078.00

Tele Vue TV-76 Accessory Package

TV-TVP-3066

For the Tele Vue TV-76 (telescope not included) 2" 90° Everbrite Diagonal with 2"-1.25" HiHat Adapter (DDP-8004) Telescope Balance Aid (APB-1008) ...

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CA$1,078.00 - CA$1,078.00
CA$1,078.00
CA$1,078.00 - CA$1,078.00
CA$1,078.00
Tele Vue TV-85 Accessory Package 1
CA$1,030.00 - CA$1,030.00
CA$1,030.00
CA$1,030.00 - CA$1,030.00
CA$1,030.00

Tele Vue TV-85 Accessory Package

TV-TVP-3373

For the Tele Vue TV-85 (telescope not included) 2" 90° Everbrite Diagonal with 2"-1.25" HiHat Adapter (DDP-8004) 3" Ring Mount - Satin (RS3-8003) ...

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CA$1,030.00 - CA$1,030.00
CA$1,030.00
CA$1,030.00 - CA$1,030.00
CA$1,030.00
CA$1,043.00 - CA$1,043.00
CA$1,043.00
CA$1,043.00 - CA$1,043.00
CA$1,043.00

TeleVue Ethos 10mm 100° Eyepiece - 1.25"/2"

TV-ETH-10.0

10mm Focal Length 100° Apparent Field of View 2" / 1.25" Hybrid Barrel 15mm Eye Relief 17.7mm Field Stop Description FAQ Specifications In the ...

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CA$1,043.00 - CA$1,043.00
CA$1,043.00
CA$1,043.00 - CA$1,043.00
CA$1,043.00
CA$1,043.00 - CA$1,043.00
CA$1,043.00
CA$1,043.00 - CA$1,043.00
CA$1,043.00

TeleVue Ethos 13mm 100° Eyepiece - 1.25"/2"

TV-ETH-13.0
1 in stock

13mm Focal Length 100° Apparent Field of View 2" / 1.25" Hybrid Barrel 15mm Eye Relief 22.3mm Field Stop Description FAQ Specifications In the ...

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CA$1,043.00 - CA$1,043.00
CA$1,043.00
CA$1,043.00 - CA$1,043.00
CA$1,043.00
CA$1,261.00 - CA$1,261.00
CA$1,261.00
CA$1,261.00 - CA$1,261.00
CA$1,261.00

TeleVue Ethos 17mm 100° Eyepiece - 2"

TV-ETH-17.0

17mm Focal Length Ultra-Wide 100° Apparent Field of View 2" Diameter Barrel 15mm Eye Relief 29.6mm Field Stop Description Q&A Specificat...

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CA$1,261.00 - CA$1,261.00
CA$1,261.00
CA$1,261.00 - CA$1,261.00
CA$1,261.00
CA$1,417.00 - CA$1,417.00
CA$1,417.00
CA$1,417.00 - CA$1,417.00
CA$1,417.00

TeleVue Ethos 21mm 100° Eyepiece - 2"

TV-ETH-21.0
1 in stock

21mm Focal Length 100° Apparent Field of View 2" Barrel 15mm Eye Relief 36.2mm Field Stop   Description FAQ Specifications In the Box Downloa...

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CA$1,417.00 - CA$1,417.00
CA$1,417.00
CA$1,417.00 - CA$1,417.00
CA$1,417.00
CA$980.00 - CA$980.00
CA$980.00
CA$980.00 - CA$980.00
CA$980.00

TeleVue Ethos 6mm 100° Eyepiece - 1.25"/2"

TV-ETH-06.0

6mm Focal Length 100° Apparent Field of View 2" / 1.25" Hybrid Barrel 15mm Eye Relief 10.4mm Field Stop Description FAQ Specifications In the B...

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CA$980.00 - CA$980.00
CA$980.00
CA$980.00 - CA$980.00
CA$980.00
CA$980.00 - CA$980.00
CA$980.00
CA$980.00 - CA$980.00
CA$980.00

TeleVue Ethos 8mm 100° Eyepiece - 1.25"/2"

TV-ETH-08.0
1 in stock

8mm Focal Length 100° Apparent Field of View 2" / 1.25" Hybrid Barrel 15mm Eye Relief 13.9mm Field Stop Description FAQ Specifications In the B...

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CA$980.00 - CA$980.00
CA$980.00
CA$980.00 - CA$980.00
CA$980.00
CA$1,043.00 - CA$1,043.00
CA$1,043.00
CA$1,043.00 - CA$1,043.00
CA$1,043.00

TeleVue Ethos-SX 3.7mm 110° Eyepiece - 1.25"/2"

TV-ETH-03.7

3.7mm Focal Length 110° Apparent Field of View 2" / 1.25" Hybrid Barrel 15mm Eye Relief 7.0mm Field Stop Description FAQ Specifications In the ...

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CA$1,043.00 - CA$1,043.00
CA$1,043.00
CA$1,043.00 - CA$1,043.00
CA$1,043.00
CA$1,043.00 - CA$1,043.00
CA$1,043.00
CA$1,043.00 - CA$1,043.00
CA$1,043.00

TeleVue Ethos-SX 4.7mm 110° Eyepiece - 1.25"/2"

TV-ETH-04.7

4.7mm Focal Length 110° Apparent Field of View 2" / 1.25" Hybrid Barrel 15mm Eye Relief 8.9mm Field Stop Description FAQ Specifications In the ...

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CA$1,043.00 - CA$1,043.00
CA$1,043.00
CA$1,043.00 - CA$1,043.00
CA$1,043.00
CA$193.00 - CA$193.00
CA$193.00
CA$193.00 - CA$193.00
CA$193.00

TeleVue Plössl 20mm 50° Eyepiece - 1.25"

TV-EAP-20.0
1 in stock

20mm Focal Length 50° Apparent Field of View 1.25" Diameter Barrel 14mm Eye Relief 17.1mm Field Stop Description FAQ Specifications In the Box ...

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CA$193.00 - CA$193.00
CA$193.00
CA$193.00 - CA$193.00
CA$193.00

Choosing Optical Accessories That Match Your Telescope

Every accessory in this collection modifies the light cone before it reaches your eye or sensor. The right choice depends almost entirely on your telescope's focal ratio, focal length and back-focus budget.

  • Eyepieces: Focal length sets magnification against your telescope's focal length; apparent field and eye relief determine how comfortable that magnification is to use.
  • Diagonals: Dielectric mirrors typically exceed 99% reflectivity; prisms can outperform them at f/10 and slower on planetary targets but introduce chromatic effects in fast refractors.
  • Barlow lenses and extenders: Multiply focal length for planetary work and push the focal plane outward, which is often the cheapest fix for a scope that will not reach focus with a diagonal.
  • Field flatteners and reducers: Correct field curvature and coma across large sensors; each has a fixed back-focus that must be hit precisely.
  • Binoviewers: Two-eye viewing that dramatically improves perceived detail on the Moon and planets, at the cost of significant added optical path.
  • Finders and reflex sights: Acquisition optics — the accessory most often skipped and most often missed.

Why Choose David Astro for Optical Accessories

Optics are easy to buy badly. A well-reviewed eyepiece can still be the wrong eyepiece for your focal ratio, exit pupil or sky.

  • Focal length guidance: We help you build a spaced eyepiece set rather than three focal lengths that overlap, and we calculate exit pupil against your aperture and typical seeing.
  • Corrector matching: We confirm that a flattener or reducer is designed for your telescope's focal ratio before you buy, since a mismatched corrector degrades a field rather than fixing it.
  • Authorized dealer: Full manufacturer warranty and verified authenticity on everything we list.
  • Canadian stock: In-stock optics ship from Canada, with no surprise duties or brokerage fees for Canadian customers.
  • Service and support after the sale: In-house diagnostics if something is not performing as expected.

Optical Accessories in Canada — Frequently Asked Questions

Will a premium eyepiece improve a modest telescope?
Usually yes at the edges of the field, especially in fast telescopes below f/6 where simpler designs struggle. On the axis at f/10, the difference between a good eyepiece and a premium one is much smaller.
How do I know if I need a flattener or a reducer?
A flattener corrects curvature at the same focal length. A reducer also shortens focal length, widening the field and speeding the system. If your stars are elongated only in the corners, you need a flattener; if you also want more field, a reducer.
Do binoviewers work in every telescope?
They add roughly 100 mm or more of optical path, so most refractors need a corrector or a Barlow-style element to reach focus. Schmidt-Cassegrains generally accommodate them without modification.
Is everything shipped domestically?
Yes. Anything shown as in stock is held in Canada and ships without customs delays for Canadian orders.

Match the accessory to the optic

Tell us your telescope and what you want to see, and we will recommend the right combination. Ships from Canada.