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IMPORTANT: Our store is located in Canada. All orders that include products manufactured outside of Canada or USA will be subject to tariffs and duties, regardless of the order value. US customers are responsible for all applicable duties and tariffs, and those will be billed by the carrier, except for the Lacerta upgrade kit, for which we collect them at checkout.
IMPORTANT: Our store is located in Canada. All orders that include products manufactured outside of Canada or USA will be subject to tariffs and duties, regardless of the order value. US customers are responsible for all applicable duties and tariffs, and those will be billed by the carrier, except for the Lacerta upgrade kit, for which we collect them at checkout.

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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$799.00 - $799.00
$799.00
$799.00 - $799.00
$799.00

iOptron 250mm f/4 Imaging Newtonian

IOP-6313

250mm (10") Parabolic Primary Mirror 1000mm Focal Length Fast f/4 Focal Ratio 10:1 Dual-Speed Focuser 34 lb 1 oz Optical Tube Assembly Weight D...

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$799.00 - $799.00
$799.00
$799.00 - $799.00
$799.00
$1,099.00 - $1,099.00
$1,099.00
$1,099.00 - $1,099.00
$1,099.00

iOptron 300mm f/4 Imaging Newtonian

IOP-6315

Clear Aperture: 300mm (11.8") Focal Ratio: f/4 Focal Length: 1200mm OTA Weight: 48 lbs Focuser: 10:1 dual-speed Description FAQ Specificat...

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$1,099.00 - $1,099.00
$1,099.00
$1,099.00 - $1,099.00
$1,099.00
iOptron Photron™ 10-inch Ritchey-Chrétien Telescope (RC10) 3'' Focuser
$2,888.00 - $2,888.00
$2,888.00
$2,888.00 - $2,888.00
$2,888.00

iOptron Photron™ 10-inch Ritchey-Chrétien Telescope (RC10) 3'' Focuser

IOP-6113

250mm (10-inch) Ritchey-Chrétien Optical Design 2000mm Focal Length at f/8 0.46 arc second Resolving Power 3-inch Dual Speed Focuser 35 lb Steel T...

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$2,888.00 - $2,888.00
$2,888.00
$2,888.00 - $2,888.00
$2,888.00
Orion Optics UK AG10 Optical Tube Assembly
$7,106.19 - $7,217.16
$7,106.19 - $7,217.16
$7,106.19 - $7,217.16
$7,106.19

Orion Optics UK AG10 Optical Tube Assembly

Options available

250mm (10-inch) Primary Mirror 950mm Focal Length Extremely Fast f/3.8 Focal Ratio 50mm Fully Corrected Flat Image Field Carbon Fibre Sandwich Tub...

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$7,106.19 - $7,217.16
$7,106.19 - $7,217.16
$7,106.19 - $7,217.16
$7,106.19
Orion Optics UK AG12 Optical Tube Assembly
$9,466.15 - $9,606.71
$9,466.15 - $9,606.71
$9,466.15 - $9,606.71
$9,466.15

Orion Optics UK AG12 Optical Tube Assembly

Options available

300mm (12") Primary Mirror 1140mm Focal Length Fast f/3.8 Focal Ratio Carbon Fibre Sandwich Tube Construction >50mm Corrected Flat Field 3" Cer...

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$9,466.15 - $9,606.71
$9,466.15 - $9,606.71
$9,466.15 - $9,606.71
$9,466.15
Orion Optics UK AG14 Optical Tube Assembly
$11,873.79 - $12,214.10
$11,873.79 - $12,214.10
$11,873.79 - $12,214.10
$11,873.79

Orion Optics UK AG14 Optical Tube Assembly

Options available

350mm Primary Mirror Diameter 1330mm Focal Length (f/3.8) >50mm Corrected Flat Field Carbon Fibre Sandwich Tube Construction 3.4µm On-Axis Spot...

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$11,873.79 - $12,214.10
$11,873.79 - $12,214.10
$11,873.79 - $12,214.10
$11,873.79
Orion Optics UK AG16 Optical Tube Assembly
$13,945.23 - $14,566.66
$13,945.23 - $14,566.66
$13,945.23 - $14,566.66
$13,945.23

Orion Optics UK AG16 Optical Tube Assembly

Options available

400mm (16") Primary Mirror Diameter 1520mm Focal Length at a fast f/3.8 Focal Ratio Corrected Flat Field Size >50mm Carbon Fibre Sandwich Tube ...

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$13,945.23 - $14,566.66
$13,945.23 - $14,566.66
$13,945.23 - $14,566.66
$13,945.23
Orion Optics UK AG20 Optical Tube Assembly Only
$29,756.40 - $29,756.40
$29,756.40
$29,756.40 - $29,756.40
$29,756.40

Orion Optics UK AG20 Optical Tube Assembly Only

OOUK-AG20-OPTICAL-TUBE-ASSEMBLY-ONLY

Largest model in the AG Astrograph range Carbon-fibre-sandwich tube CERES 3" (76.2mm) focuser standard Built to order in the UK Description Spe...

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$29,756.40 - $29,756.40
$29,756.40
$29,756.40 - $29,756.40
$29,756.40
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

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.