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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.

Discontinued Products

Products no longer in production. This collection exists as a reference — for identifying what you own, checking what a discontinued model was compatible with, and finding out whether parts and service are still available. Being discontinued does not mean unsupported, and a great deal of excellent astronomy equipment is no longer made.

If you own something listed here and need a part, an adapter or a repair, contact us. We can frequently source service parts through dealer channels that are not publicly listed.

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$999.90 - $999.90
$999.90
$999.90 - $999.90
$999.90

Explore Scientific FirstLight 10" Dobsonian - Discontinued

ES-FL-DOB1005-01

No telescope type has changed the hobby quite as much as the Dobsonian. Before the introduction of the Dobsonian by John Dobson, the vast majority ...

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$999.90 - $999.90
$999.90
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$249.99 - $249.99
$249.99
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$249.99

Explore Scientific FirstLight 100mm Mak-Cassegrain with EQ3 Mount - Discontinued

ES-FL-MC1001400EQ3
Only 4 left!

Mak-Cassegrain Optical Design Long Focal Length for High Magnification German Equatorial EQ3 Mount Slow-Motion Controls for Precise Tracking Compa...

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$249.99 - $249.99
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$3,799.00 - $3,799.00
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ZWO ASI6200MM Pro Mono - Discontinued

ZWO-ASI6200MM-P

ASI6200MM Pro uses Sony’s latest back-illuminated IMX455 Full Frame format native 16-bit ADC sensor. It has 3.76µm pixels, ultra-low 1.2e readout n...

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$2,999.00 - $2,999.00
$2,999.00
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$2,999.00

ZWO ASI2400MC Pro - Discontinued

ZWO-ASI2400MC-P

The First CMOS Astro Camera Which Adopts Sony IMX410 SensorASI2400MC Pro uses Sony’s latest back-illuminated IMX410 full-frame format 14-bit ADC se...

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$2,999.00 - $2,999.00
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$608.00 - $608.00
$608.00
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$608.00

Baader Star Diagonal Prism w/ Zeiss Spec Prism & BBHS Coating - 2" ClickLock - Discontinued

BAA-2456117

2" Star Diagonal with Zeiss-Specification Prism BaK4 Glass Construction Proprietary BBHS (Broad-Band Hard-Silver) Coatings Baader 2" ClickLock Eye...

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$608.00 - $608.00
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$119.00 - $119.00
$119.00
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QHYCCD QHY5L-II-C Color USB2.0 - Discontinued

QHY-QHY5L-II-C

QHY5-II series cameras fit in a standard 1.25-inch eyepiece holder and have an adjustable location ring for confocality with an eyepiece. They are ...

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$119.00 - $119.00
$119.00
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$179.99 - $179.99
$179.99
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Explore Scientific 2.5 Hex Focuser - Discontinued

ES-FOC25H

Description APO EDT Series Crayford Style Focuser Item Number FOC25H Weight 1.5lb; .68kg Diameter 2.5" Length 104.8mm

$179.99 - $179.99
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$229.99 - $229.99
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$229.99 - $229.99
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Explore Scientific FirstLight 102mm Doublet Refractor with Twilight Nano Mount - Discontinued

ES-FL-AR102600TN
Only 1 left!

102mm (4") Aperture Air-Spaced Doublet Refractor Optics Fully Multi-Coated Lenses Twilight Nano Alt-Azimuth Mount Full-Size, Adjustable Tripod ...

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$229.99 - $229.99
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$159.99 - $159.99
$159.99
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Explore Scientific FirstLight 80mm Refractor with Twilight Nano Mount - Discontinued

ES-FL-AR80640TN

80mm Achromatic Refractor 640mm Focal Length (f/8) Twilight Nano Alt-Azimuth Mount Includes Plössl Eyepiece and Smartphone Adapter Full-Size Tripo...

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$159.99 - $159.99
$159.99
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$499.99 - $499.99
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Explore Scientific FirstLight 127mm Mak-Cassegrain with Twilight Nano Mount - Discontinued

ES-FL-MC1271900TN

127mm (5") Maksutov-Cassegrain Optical Tube 1900mm Focal Length (f/15) Twilight Nano Alt-Azimuth Mount 25mm Plössl Eyepiece and Red-Dot Finder Inc...

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$499.99 - $499.99
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$400.00 - $400.00
$400.00
$400.00 - $400.00
$400.00

Sky-Watcher AZ-GTe Mount - Discontinued

SW-S21140

The Sky-Watcher AZ-GTe series is for anyone looking for a small, powerful mount. Weighing just 8.6 pounds, complete with pier extension and tripod,...

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$400.00 - $400.00
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$430.00 - $430.00
$430.00
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$430.00

Antlia 2.8nm Narrowband SII Ultra Filter - Discontinued

ANT-SII-2.8NM-RD36

Antlia SII Ultra narrowband filter optimizes the FWHM (full width half maximum) to 2.8nm bandpass. As the bandwidth becomes narrower, the 2.8nm Ul...

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$430.00 - $430.00
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Antlia 2.8nm Narrowband OIII Ultra Filter - Discontinued

ANT-OIII-2.8NM-RD36

Antlia OIII Ultra narrowband filter optimizes the FWHM (full width half maximum) to 2.8nm bandpass. As the bandwidth becomes narrower, the 2.8nm U...

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$430.00 - $430.00
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Antlia 2.8nm Narrowband H-alpha Ultra Filter - Discontinued

ANT-HA-2.8NM-RD36

Antlia H-alpha Pro narrowband filter optimizes the FWHM (full width half maximum) to 2.8nm bandpass. As the bandwidth becomes narrower, the 2.8nm ...

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$430.00 - $430.00
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$199.99 - $199.99
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Explore One Aurora II Flat Black 114mm Slow Motion AZ Mount Telescope - Discontinued

ES-88-20114

114mm (4.5") Newtonian Reflector Optics 500mm Focal Length Alt-Azimuth Mount with Slow-Motion Controls Includes Plossl Eyepieces for 20x and 52x M...

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$199.99 - $199.99
$199.99
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$49.00 - $49.00
$49.00
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$49.00

ZWO 86mm Holder Ring - Discontinued

ZWO-RINGD86

ZWO Holder Ring for ZWO ASI PRO COOLED CAMERAS with approx. 86mm diameter.Currently compatible with the following ZWO cameras: ASI094, ASI128 and A...

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$761.00 - $761.00
$761.00
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William Optics Mortar Tri-Pier w/ Bag - Discontinued

WO-YG-MT1000BR

Pier System designed for telescopes and instruments Offers high stability and adjustability Description In the Box Warranty The...

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$761.00 - $761.00
$761.00
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$15.99 - $15.99
$15.99
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Explore Scientific SmartPhone Adapter - Discontinued

ES-SPCA125-00

Adapts virtually any smartphone for afocal astrophotography Attaches securely to standard 1.25" telescope eyepieces Features a soft silicon rubber...

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$15.99 - $15.99
$15.99
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$39.99 - $39.99
$39.99
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Explore Scientific 12V Universal AC Power Supply for EXOS-2GT Mount - Discontinued

ES-EXOS2GTAC

Provides continuous 12V power to the EXOS-2GT mount Connects to any standard AC wall outlet Replaces the need for the 8 D-cell battery pack for ho...

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$39.99 - $39.99
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$89.99 - $89.99
$89.99
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Explore Scientific Cradle for White 102mm - Discontinued

ES-TED102CRDL

Accommodates tubes with a 99.06mm to 105mm outside diameter 200mm (7.9") cradle length for stable support Hinged ring design with oversized thumbs...

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$89.99 - $89.99
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$71.99 - $71.99
$71.99
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$71.99

Explore Scientific Two-Speed 10:1 Focus Knob Mechanism for 2.5" HEX Focusers - Discontinued

ES-625720

Explore Scientific Two-Speed 10:1 Focus Knob Mechanism for 2.5" HEX Focusers

$71.99 - $71.99
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$69.99 - $69.99
$69.99
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Explore Scientific Extension Ring Set M48x0.75 - 5 pieces (30, 20, 15, 10 and 5 mm) - Discontinued

ES-510381

Set of 5 extension tubes: 5, 10, 15, 20, and 30 mm Standard M48x0.75 female and male threads on each tube Provides combined extension from 5 mm to...

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$69.99 - $69.99
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$699.99 - $699.99
$699.99
$699.99 - $699.99
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Explore Scientific FirstLight 102mm Doublet Refractor with Twilight I Mount - Discontinued

ES-FL-AR1021000MAZ01

102mm (4") Aperture Doublet Refractor 1000mm Focal Length (f/9.8) Twilight I Manual Alt-Azimuth Mount 2.5" Hexagonal Focuser Includes 25mm Plössl ...

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$699.99 - $699.99
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$749.99 - $749.99
$749.99
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Explore Scientific FirstLight 152mm Mak-Cassegrain - Discontinued

ES-FL-MC1521900

152mm (6") Aperture 1900mm Focal Length f/12.5 Focal Ratio Maksutov-Cassegrain Optical Design Description FAQ Specifications In the Box Downloa...

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Owning Discontinued Equipment

Astronomy equipment has a long service life, and a discontinued model is often mechanically identical to something still in production.

  • Parts availability: Manufacturers often maintain service stock well beyond a product's sales life and supply it to authorized dealers on request.
  • Common failure parts: Thumbscrews, springs, gears and cables are the items that typically fail, and many are shared across product generations.
  • Adapters and compatibility: Older equipment frequently uses the same thread standards as current products, so modern accessories often fit.
  • Repair rather than replacement: Mechanical assemblies can often be repaired or refurbished in-house even when a factory part no longer exists.
  • Used market: Discontinued models remain available second hand, and many are excellent value for their capability.
  • Successor identification: If a repair is not economic, we can identify the current model that replaced yours and what changed.

Why Choose David Astro for Discontinued Equipment Support

Being an authorized dealer matters most for products that are no longer sold.

  • Dealer channel parts access: We can request service parts that never appear in public catalogues, which is often the only route to a specific component.
  • Identification from photographs: Send us a picture and we will identify the model and the part, since documentation for older equipment is frequently unavailable.
  • In-house repair: Where no part exists, we can often repair or fabricate a working solution rather than declare the equipment finished.
  • Compatibility advice: We will tell you which current accessories fit older equipment, which is more often than people expect.
  • Ships from Canada: Parts and accessories delivered domestically without duties or brokerage fees.

Discontinued Products in Canada — Frequently Asked Questions

Can I still get parts for a discontinued product?
Often yes. Manufacturers keep service stock beyond a product's sales life and supply it to dealers. Tell us the model and what you need and we will check availability.
Is old astronomy equipment still worth using?
Frequently. Optics that are cared for hold their performance for decades, and mechanically sound mounts often outperform newer budget ones. Electronics are what usually date first.
Will modern accessories fit older equipment?
More often than expected, since thread standards like M42, M48 and SCT have been stable for a long time. Tell us the equipment and we will confirm.
What if no part is available?
We can often repair the assembly or fabricate a functional replacement in-house. Where that is not economic, we will identify the current equivalent and what has changed.

Own something no longer made?

Send us a photo and the model and we will find parts or repair it. Canadian stock and in-house service.