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Reflectors

No design delivers more aperture for the money than a Newtonian reflector. A mirror is cheaper to make well than a lens, has no chromatic aberration whatsoever, and scales to sizes that would be impossible in glass — which is why almost every large amateur telescope is a reflector. David Astro carries reflectors in Canada, from fast imaging astrographs to large visual Newtonians, stocked in Canada and shipped worldwide.

The trade is collimation and a coma corrector. Both are manageable, and we will be straightforward about what each telescope actually needs.

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Orion Optics UK AG8 f/3.8 Astrograph OTA
$5,418.35 - $5,514.52
$5,418.35 - $5,514.52
$5,418.35 - $5,514.52
$5,418.35

Orion Optics UK AG8 f/3.8 Astrograph OTA

Options available

200mm (8-inch) Primary Mirror 760mm Focal Length Extremely Fast f/3.8 Focal Ratio 45mm Corrected Flat Field Circle Carbon Fibre Sandwich Tube Cons...

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$5,418.35 - $5,514.52
$5,418.35 - $5,514.52
$5,418.35 - $5,514.52
$5,418.35
Orion Optics UK CT10 Optical Tube Assembly
$3,111.27 - $3,111.27
$3,111.27
$3,111.27 - $3,111.27
$3,111.27

Orion Optics UK CT10 Optical Tube Assembly

OOUK-CT10-OPTICAL-TUBE-ASSEMBLY

250mm (10") Aperture Newtonian Reflector 1200mm Focal Length f/4.8 Focal Ratio Guaranteed 1/10 PV Wavefront Optics Carbon Fibre Sandwich Construct...

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$3,111.27 - $3,111.27
$3,111.27
$3,111.27 - $3,111.27
$3,111.27
Orion Optics UK CT10L Optical Tube Assembly
$4,516.89 - $4,516.89
$4,516.89
$4,516.89 - $4,516.89
$4,516.89

Orion Optics UK CT10L Optical Tube Assembly

OOUK-CT10L-OPTICAL-TUBE-ASSEMBLY

250mm (10-inch) Aperture 1575mm Focal Length (f/6.3) Guaranteed 1/10 PV Wavefront Optics Carbon Fibre Sandwich Tube Construction 12.5kg Optical Tu...

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$4,516.89 - $4,516.89
$4,516.89
$4,516.89 - $4,516.89
$4,516.89
Orion Optics UK CT12 Optical Tube Assembly
$4,073.01 - $4,073.01
$4,073.01
$4,073.01 - $4,073.01
$4,073.01

Orion Optics UK CT12 Optical Tube Assembly

OOUK-CT12-OPTICAL-TUBE-ASSEMBLY

300mm (12") Aperture f/4 Newtonian Reflector 1200mm Focal Length Certified 1/10 PV Wavefront Primary Mirror Carbon Fiber Sandwich Tube Constructio...

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$4,073.01 - $4,073.01
$4,073.01
$4,073.01 - $4,073.01
$4,073.01
Orion Optics UK CT12L Optical Tube Assembly
$4,590.87 - $4,590.87
$4,590.87
$4,590.87 - $4,590.87
$4,590.87

Orion Optics UK CT12L Optical Tube Assembly

OOUK-CT12L-OPTICAL-TUBE-ASSEMBLY

300mm (12") Aperture 1590mm Focal Length, f/5.3 Focal Ratio Standard 1/10 PV Wavefront Optics Carbon Fibre Sandwich Tube Construction 2" Focuser w...

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$4,590.87 - $4,590.87
$4,590.87
$4,590.87 - $4,590.87
$4,590.87
Orion Optics UK CT14 Optical Tube Assembly
$6,695.19 - $6,695.19
$6,695.19
$6,695.19 - $6,695.19
$6,695.19

Orion Optics UK CT14 Optical Tube Assembly

OOUK-CT14-OPTICAL-TUBE-ASSEMBLY

350mm (14") Aperture 1600mm Focal Length (f/4.6) Guaranteed 1/10 PV Wavefront Optics Carbon Fibre Sandwich Tube Construction 26kg Optical Tube Wei...

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$6,695.19 - $6,695.19
$6,695.19
$6,695.19 - $6,695.19
$6,695.19
Orion Optics UK CT16 Optical Tube Assembly
$7,582.95 - $7,582.95
$7,582.95
$7,582.95 - $7,582.95
$7,582.95

Orion Optics UK CT16 Optical Tube Assembly

OOUK-CT16-OPTICAL-TUBE-ASSEMBLY

400mm (16") Aperture 1600mm Focal Length (f/4) 1/10 PV Wavefront Standard Optics Carbon Fiber Sandwich Tube Construction 36kg Optical Tube Weight ...

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$7,582.95 - $7,582.95
$7,582.95
$7,582.95 - $7,582.95
$7,582.95
Orion Optics UK CT8 Optical Tube Assembly
$2,237.21 - $2,237.21
$2,237.21
$2,237.21 - $2,237.21
$2,237.21

Orion Optics UK CT8 Optical Tube Assembly

OOUK-CT8-OPTICAL-TUBE-ASSEMBLY

200mm (8") Aperture 900mm Focal Length (f/4.5) 1/10 PV Wavefront Certified Optics Carbon Fiber Sandwich Tube Construction 7kg Optical Tube Weight ...

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$2,237.21 - $2,237.21
$2,237.21
$2,237.21 - $2,237.21
$2,237.21
Orion Optics UK IDEAL 10 Optical Tube Assembly
$1,612.49 - $1,782.37
$1,612.49 - $1,782.37
$1,612.49 - $1,782.37
$1,612.49

Orion Optics UK IDEAL 10 Optical Tube Assembly

Options available

250mm (10-inch) Primary Mirror 1200mm Focal Length f/4.8 Focal Ratio Standard 1/6 PV Wavefront Hand-Figured Optics 11kg Nominal Tube Weight Des...

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$1,612.49 - $1,782.37
$1,612.49 - $1,782.37
$1,612.49 - $1,782.37
$1,612.49
Orion Optics UK IDEAL 10L Optical Tube Assembly
$1,626.19 - $1,796.07
$1,626.19 - $1,796.07
$1,626.19 - $1,796.07
$1,626.19

Orion Optics UK IDEAL 10L Optical Tube Assembly

Options available

250mm (10-inch) primary mirror diameter 1600mm focal length (f/6.3) Standard 1/6 PV wavefront optical accuracy CNC-machined 9-point suspension mir...

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$1,626.19 - $1,796.07
$1,626.19 - $1,796.07
$1,626.19 - $1,796.07
$1,626.19
Orion Optics UK IDEAL 12 Optical Tube Assembly
$2,160.49 - $2,433.12
$2,160.49 - $2,433.12
$2,160.49 - $2,433.12
$2,160.49

Orion Optics UK IDEAL 12 Optical Tube Assembly

Options available

300mm (12") Primary Mirror 1200mm Focal Length f/4 Focal Ratio 1/6 PV Wavefront Standard Optics 14kg Tube Weight Description FAQ Specifications...

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$2,160.49 - $2,433.12
$2,160.49 - $2,433.12
$2,160.49 - $2,433.12
$2,160.49
Orion Optics UK IDEAL 12L Optical Tube Assembly
$2,174.19 - $2,446.82
$2,174.19 - $2,446.82
$2,174.19 - $2,446.82
$2,174.19

Orion Optics UK IDEAL 12L Optical Tube Assembly

Options available

300mm (12") Primary Mirror Diameter 1600mm Focal Length (f/5.3) 1/6 PV Wavefront Standard Optical Accuracy Eris 2" Rack and Pinion Focuser 16kg No...

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$2,174.19 - $2,446.82
$2,174.19 - $2,446.82
$2,174.19 - $2,446.82
$2,174.19
$3,985.33 - $4,281.25
$3,985.33 - $4,281.25
$3,985.33 - $4,281.25
$3,985.33

Orion Optics UK IDEAL 14 Optical Tube Assembly

Options available

350mm (14") Primary Mirror 1600mm Focal Length (f/4.6) Standard 1/6 PV Wavefront Hand-Figured Optics CNC-Machined 9-Point Suspension Mirror Cell E...

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$3,985.33 - $4,281.25
$3,985.33 - $4,281.25
$3,985.33 - $4,281.25
$3,985.33
Orion Optics UK IDEAL 16 Optical Tube Assembly
$5,129.77 - $5,802.44
$5,129.77 - $5,802.44
$5,129.77 - $5,802.44
$5,129.77

Orion Optics UK IDEAL 16 Optical Tube Assembly

Options available

400mm (16") Primary Mirror 1600mm Focal Length Fast f/4 Focal Ratio Standard 1/6 PV Wavefront Optics with Zygo Report CNC-Machined 9-Point Mirror ...

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$5,129.77 - $5,802.44
$5,129.77 - $5,802.44
$5,129.77 - $5,802.44
$5,129.77
Orion Optics UK IDEAL 6 Optical Tube Assembly
$685.00 - $749.39
$685.00 - $749.39
$685.00 - $749.39
$685.00

Orion Optics UK IDEAL 6 Optical Tube Assembly

Options available

150mm (6") Primary Mirror 750mm Focal Length (f/5) Standard 1/6 PV Wavefront Hand-Figured Optics Lightweight 4.5kg Aluminium Tube Eris 2" Rack &am...

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$685.00 - $749.39
$685.00 - $749.39
$685.00 - $749.39
$685.00
Orion Optics UK IDEAL 6L Optical Tube Assembly
$698.70 - $763.09
$698.70 - $763.09
$698.70 - $763.09
$698.70

Orion Optics UK IDEAL 6L Optical Tube Assembly

Options available

150mm (6") Newtonian Reflector Optical Tube 1200mm Focal Length at an f/8 Focal Ratio Certified 1/6 PV Wavefront Primary Mirror Optics CNC-Machine...

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$698.70 - $763.09
$698.70 - $763.09
$698.70 - $763.09
$698.70
Orion Optics UK IDEAL 8 Optical Tube Assembly
$1,219.30 - $1,316.57
$1,219.30 - $1,316.57
$1,219.30 - $1,316.57
$1,219.30

Orion Optics UK IDEAL 8 Optical Tube Assembly

Options available

200mm (8") Primary Mirror 900mm Focal Length Fast f/4.5 Focal Ratio Guaranteed 1/6 PV Wavefront Standard Optics CNC-Machined 9-Point Mirror Cell 7...

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$1,219.30 - $1,316.57
$1,219.30 - $1,316.57
$1,219.30 - $1,316.57
$1,219.30
Orion Optics UK IDEAL 8L Optical Tube Assembly
$1,233.00 - $1,330.27
$1,233.00 - $1,330.27
$1,233.00 - $1,330.27
$1,233.00

Orion Optics UK IDEAL 8L Optical Tube Assembly

Options available

200mm Primary Mirror 1200mm Focal Length (f/6) 1/6 PV Wavefront Standard Optics CNC 9-Point Suspension Mirror Cell Eris 2" Rack and Pinion Focuser...

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$1,233.00 - $1,330.27
$1,233.00 - $1,330.27
$1,233.00 - $1,330.27
$1,233.00
Orion Optics UK ODK10 Optical Tube Assembly
$5,952.65 - $5,952.65
$5,952.65
$5,952.65 - $5,952.65
$5,952.65

Orion Optics UK ODK10 Optical Tube Assembly

OOUK-ODK10-OPTICAL-TUBE-ASSEMBLY

250mm (10") Corrected Dall-Kirkham Optics 1700mm Focal Length at f/6.8 50mm Fully Corrected Flat Image Circle 3.5μm On-Axis Spot Size Carbon Fibre...

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$5,952.65 - $5,952.65
$5,952.65
$5,952.65 - $5,952.65
$5,952.65
Orion Optics UK ODK10Tr Truss Optical Tube Assembly
$8,083.00 - $8,083.00
$8,083.00
$8,083.00 - $8,083.00
$8,083.00

Orion Optics UK ODK10Tr Truss Optical Tube Assembly

OOUK-ODK10TR-OPTICAL-TUBE-ASSEMBLY

250mm (10-inch) Optimized Dall-Kirkham optics 1700mm focal length at a native f/6.8 focal ratio 50mm fully corrected, flat image circle for large ...

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$8,083.00 - $8,083.00
$8,083.00
$8,083.00 - $8,083.00
$8,083.00
Orion Optics UK ODK12 Optical Tube Assembly
$9,514.65 - $9,514.65
$9,514.65
$9,514.65 - $9,514.65
$9,514.65

Orion Optics UK ODK12 Optical Tube Assembly

OOUK-ODK12-OPTICAL-TUBE-ASSEMBLY

300mm (12") Optimised Dall-Kirkham Optics 2040mm Focal Length at a fast f/6.8 Focal Ratio Covers a greater than 52mm flat imaging circle Delivers ...

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$9,514.65 - $9,514.65
$9,514.65
$9,514.65 - $9,514.65
$9,514.65
Orion Optics UK ODK12Tr Truss Optical Tube Assembly
$11,432.65 - $11,432.65
$11,432.65
$11,432.65 - $11,432.65
$11,432.65

Orion Optics UK ODK12Tr Truss Optical Tube Assembly

OOUK-ODK12TR-OPTICAL-TUBE-ASSEMBLY

300mm (12") Optimized Dall-Kirkham Astrograph 2040mm Focal Length (f/6.8) >52mm Flat, Corrected Image Circle 1.8µm On-Axis Spot Size Carbon Fib...

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$11,432.65 - $11,432.65
$11,432.65
$11,432.65 - $11,432.65
$11,432.65
Orion Optics UK ODK14 Optical Tube Assembly
$12,939.65 - $12,939.65
$12,939.65
$12,939.65 - $12,939.65
$12,939.65

Orion Optics UK ODK14 Optical Tube Assembly

OOUK-ODK14-OPTICAL-TUBE-ASSEMBLY

Primary Mirror Diameter: 350mm Focal Ratio: f/6.8 Corrected Image Circle: >52mm Tube Material: Carbon Fibre Sandwich Back Focus: 210mm Tu...

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$12,939.65 - $12,939.65
$12,939.65
$12,939.65 - $12,939.65
$12,939.65
Orion Optics UK ODK14Tr Truss Optical Tube Assembly
$14,446.65 - $14,446.65
$14,446.65
$14,446.65 - $14,446.65
$14,446.65

Orion Optics UK ODK14Tr Truss Optical Tube Assembly

OOUK-ODK14TR-OPTICAL-TUBE-ASSEMBLY

350mm (14") Optimized Dall-Kirkham Optics 2380mm Focal Length (f/6.8) >52mm Fully Illuminated and Corrected Image Circle 2.1µm On-Axis Spot Siz...

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$14,446.65 - $14,446.65
$14,446.65
$14,446.65 - $14,446.65
$14,446.65

Newtonian Design and What It Demands

A parabolic primary and a flat diagonal secondary. Simple, efficient, and with two characteristics you have to work with rather than around.

  • Focal ratio and its consequences: Fast Newtonians around f/4 give wide bright fields for imaging but demand precise collimation and a coma corrector. Slower f/6 to f/8 designs are far more forgiving.
  • Coma: Off-axis stars take a comet shape, inherent to a parabolic mirror and increasingly obvious as focal ratio drops. A coma corrector is effectively mandatory below f/6 for imaging.
  • Collimation: Mirror alignment shifts with transport and temperature. Fast scopes need checking each session; slower ones hold for weeks.
  • Central obstruction: The secondary mirror reduces contrast slightly. Imaging Newtonians use larger secondaries to fully illuminate a sensor; visual designs minimize them.
  • Cooling: A large mirror stores heat and produces a boundary layer that softens detail until it equalizes. Rear fans reduce the wait considerably on Canadian nights.
  • Dobsonian mounting: The most practical way to support a large Newtonian for visual use, at a fraction of an equatorial's cost.

Why Choose David Astro for Reflectors

A reflector is excellent value provided you are set up to maintain it, and we would rather tell you that beforehand.

  • Collimation expectations set honestly: We tell you how often your specific focal ratio needs checking and recommend a tool that matches, so it is a two-minute routine rather than a chore.
  • Coma corrector specified with the tube: For imaging Newtonians we supply the corrector and its spacing alongside the telescope, since the field is unusable without it.
  • Focuser assessment: Stock focusers on fast Newtonians often cannot hold an imaging train squarely, and we will say when an upgrade is genuinely required.
  • Authorized dealer: Full manufacturer warranty and verified authenticity, with service in Canada.
  • Ships from Canada: Large optics delivered domestically with no duties or brokerage fees.

Reflectors in Canada — Frequently Asked Questions

How often will I need to collimate?
An f/4 imaging Newtonian benefits from a check every session. An f/6 visual scope typically holds alignment for weeks unless transported roughly. It takes about two minutes once you are practised.
Do I need a coma corrector?
For imaging below about f/6, yes — corner stars will show obvious coma otherwise. For visual use at f/5 and slower most observers are untroubled, though a corrector does improve the edge.
How long does a mirror take to cool?
A 200 mm mirror moved from a warm house to a Canadian winter night typically needs 45 minutes or more. A rear-mounted fan blowing across the mirror face reduces that substantially.
Are reflectors good for planets?
Yes, given aperture and good collimation. A well-collimated 200 mm Newtonian shows excellent planetary detail; the central obstruction costs a little contrast that extra aperture more than repays.

Considering a Newtonian?

Tell us whether it is for visual or imaging and we will specify the tube, corrector and tools. Canadian stock, worldwide shipping.