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    Astrodon H-alpha Filter - 5nm

    DON-HA5_31R
    Only 1 left!

    H-α (hydrogen-alpha) at 656 nm (nanometers) is deep red in color and the most popular narrowband filter. Hydrogen is ubiquitous in the cosmos and i...

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    Astrodon SII Filter - 5nm

    DON-SII5_31R
    Only 1 left!

    If you want the look of Hubble Space Telescope (HST) images, such as the famous “Pillars of Creation” (the Eagle Nebula, Messier 16), then the next...

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    Baader 4nm 1.25" Ultra-Narrowband OIII Filter - CMOS-Optimized (USED)

    BAA-2961400-125-USED
    Only 1 left!

    In perfect condition, used Baader H-alpha / O-III / S-II Ultra-Narrowband (Narrowband) filter set - Premium Grade 3.5 / 4 nm half width (to harmo...

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    Baader 6.5nm 36mm H-alpha Filter - CMOS-Optimized (OPEN BOX)

    BAA-2961100-36-OPENBOX
    Only 1 left!

    In perfect condition, open box Baader H-alpha / O-III / S-II Narrowband Filter Set - Precision Grade 6.5 nm FWHM, recommended for optical systems...

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    Baader CCD LRGB 31mm Unmounted Filter Set (OPEN BOX)

    BAA-2459474-OPENBOX
    Only 1 left!

    In perfect condition, open box Filter size 31 mm - round, unmounted - filter thickness 2 mm Set of L-R-G-B filters High-quality anti-reflective ...

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    Baader T-Ring Nikon - T-2 - Used

    U-BAA-2408300
    Only 1 left!

    Like new! Baader T-Ring to connect Nikon DSLR cameras onto the Astro T-2 system Results in the standard exact distance of 55.0mm from the front fac...

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    CA$1,788.00

    Celestron Nexstar 6SE kit with lots of accessories - Used

    U-CEL-11068
    Only 1 left!

    This used kit comes with: Nexstar 6SE telescope, mount and tripod Celestron Padded carrying case Celestron 2" Dieletric diagonal with twist lock C...

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    Celestron Off-Axis Guider -Used

    U-CEL-93648

    In good condition. Adapters show sign of use.  Comes with all original adapters and in the original box. Features Most accurate way to guide – im...

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    Celestron PowerTank Lithium - Used

    U-CEL-18771
    Only 1 left!

    Like new!Features Portable power pack for your computerized Celestron telescope using Lithium-Iron Phosphate (LiFePO4) chemistry Powers your telesc...

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    Celestron Reducer - Corrector - Used

    U-CEL-94175
    1 in stock

    In excellent condition! Comes in original boxFeatures This combination focal reducer and field corrector lens accessory works with all Celestron 5"...

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    CA$666.00
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    CA$499.00

    Celestron StarSense AutoAlign - Used

    U-CEL-94005
    Only 1 left!

    In good condition! Comes with all accessories included, and in its original box.Features Enables automatic alignment of your Celestron computerized...

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    CA$666.00
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    CA$24.00
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    CA$15.00

    Celestron T-Ring for Canon EOS Camera - Used

    U-CEL-93419
    Only 1 left!

    In fair conditionFeatures This Celestron T-Ring attaches to Canon EOS DSLR and SLR camera bodies Sturdy bayonet flange locks in place just like a l...

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    CA$153.00
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    CA$119.00
    CA$119.00 - CA$119.00
    CA$119.00

    Celestron X-Cel LX 9 mm - 1.25" - Used

    U-CEL-93423
    Only 1 left!

    Like new!Features X-Cel LX eyepieces, optimized for planetary viewing, offer a 60° field of view through a six-element fully multi-coated lens syst...

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    CA$119.00
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    CA$119.00
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  • CA$2,799.00 - CA$2,799.00
    CA$2,799.00
    CA$2,829.00
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    CA$2,829.00

    Diffraction Limited Boltwood Cloud Sensor II

    The Boltwood Cloud Sensor II is the must-have accessory for your remote or automated observatory. Protect your valuable equipment from weather dama...

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    CA$2,799.00 - CA$2,799.00
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  • CA$350.00 - CA$665.00
    CA$350.00
    CA$380.00 - CA$695.00
    CA$380.00 - CA$695.00
    CA$380.00

    Diffraction Limited Boltwood Cloud Sensor II Replacement Cable

    Options available

    Replacement cable for your Boltwood Cloud Sensor. Custom-designed cable rated for UV exposure and in-ground installation. Available in 50 foot / 15...

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    CA$350.00 - CA$665.00
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    CA$380.00 - CA$695.00
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    CA$380.00
  • CA$525.00 - CA$525.00
    CA$525.00
    CA$555.00
    CA$555.00 - CA$555.00
    CA$555.00

    Diffraction Limited Boltwood Portable Cloud Sensor

    DL-Portable Cloud Sensor

    A battery powered cloud sensor, perfect for those expeditions to dark-sky sites and star parties!

    CA$525.00 - CA$525.00
    CA$525.00
    CA$555.00
    CA$555.00 - CA$555.00
    CA$555.00
  • CA$419.00 - CA$419.00
    CA$419.00
    CA$449.00
    CA$449.00 - CA$449.00
    CA$449.00

    Diffraction Limited Cloud Sensor Adapter Box

    DL-CS2-ADAPTER

    Replacement adapter box for the Boltwood II Cloud Sensor.

    CA$419.00 - CA$419.00
    CA$419.00
    CA$449.00
    CA$449.00 - CA$449.00
    CA$449.00
  • CA$525.00 - CA$525.00
    CA$525.00
    CA$555.00
    CA$555.00 - CA$555.00
    CA$555.00

    Diffraction Limited CSbG EcoLight

    DL-CSbG EcoLight

    "The CSbG EcoLight is a low-impact alternative for applications where the priority is the protection of the environment and human health. It has u...

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    CA$525.00 - CA$525.00
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    CA$555.00
  • CA$413.00 - CA$413.00
    CA$413.00
    CA$443.00
    CA$443.00 - CA$443.00
    CA$443.00

    Diffraction Limited Extra-Spare Thermopile / Rain Sensor Disc

    DL-CS2-RAIN-SENSOR-DISK

    #N/A

    CA$413.00 - CA$413.00
    CA$413.00
    CA$443.00
    CA$443.00 - CA$443.00
    CA$443.00
  • CA$1,253.00 - CA$1,953.00
    CA$1,253.00
    CA$1,283.00 - CA$1,983.00
    CA$1,283.00 - CA$1,983.00
    CA$1,283.00

    Diffraction Limited MaxDome II

    Options available

    nullThe MaxDome II dome controller provides flexible, fully integrated observatory dome control. Features include: ASCOM-Standard dome and telesc...

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    CA$1,253.00 - CA$1,953.00
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    CA$3,329.00
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    CA$2,499.00
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    CA$2,499.00

    Explore Scientific ED127 Triplet APO f/7.5 with accessories - USED

    Only 1 left!

    ED127 telescope (good condition) 3" 0.7x reducer from Explore Scientific (brand new) 2" Field flattener from Explore Scientific (good condition) 6...

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    CA$3,329.00
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  • CA$308.00 - CA$308.00
    CA$308.00
    CA$338.00
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    CA$338.00

    Explore Scientific FirstLight 100mm Mak-Cassegrain with EQ3 Mount

    ES-FL-MC1001400EQ3
    4 in stock

    Whether you’re looking to delve into the details of our solar system or explore inspiring deep sky treasures, the versatile FirstLight series has a...

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    CA$308.00 - CA$308.00
    CA$308.00
    CA$338.00
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    CA$338.00
  • CA$350.00 - CA$350.00
    CA$350.00
    CA$380.00
    CA$380.00 - CA$380.00
    CA$380.00

    Explore Scientific FirstLight 100mm Mak-Cassegrain with Twilight Nano Mount

    ES-FL-MC1001400TN

    Whether you’re looking to delve into the details of our solar system or explore inspiring deep sky treasures, the versatile FirstLight series has a...

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    CA$350.00 - CA$350.00
    CA$350.00
    CA$380.00
    CA$380.00 - CA$380.00
    CA$380.00
  • CA$532.00 - CA$532.00
    CA$532.00
    CA$562.00
    CA$562.00 - CA$562.00
    CA$562.00

    Explore Scientific FirstLight 102mm Doublet Refractor with EXOS EQ Nano Mount

    ES-FL-AR1021000EQ3
    1 in stock

    Whether you’re looking to delve into the details of our solar system or explore inspiring deep sky treasures, the versatile FirstLight series has a...

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    CA$532.00 - CA$532.00
    CA$532.00
    CA$562.00
    CA$562.00 - CA$562.00
    CA$562.00