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Solar Astronomy

The Sun is the only object in astronomy that changes visibly within an hour, and the only one that can permanently damage your eyes in a fraction of a second. Done with proper equipment, solar observing is the most accessible branch of the hobby, no dark sky, no late night, no travel. David Astro carries solar astronomy products in Canada: hydrogen-alpha telescopes, white-light filters, Calcium-K modules, wedges and dedicated solar accessories, in Canadian inventory and shipped domestically.

Safety here is absolute, and we will not sell an unsafe combination. If you are unsure whether a filter or setup is appropriate, ask us before you point anything at the Sun.

Filters

Original price $139.00 USD - Original price $492.00 USD
Original price
$139.00 USD - $492.00 USD
$139.00 USD - $492.00 USD
Current price $139.00 USD

Baader Planetarium AstroSolar® ClearWhite Safety Film OD 5.1

Certified AstroSolar® Safety Film Optical Density 5.1 for Visual Use Available as 100x50cm or Giant-size 117x117cm Sheet "ClearWhite" Neutral Colo...

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Original price $139.00 USD - Original price $492.00 USD
Original price
$139.00 USD - $492.00 USD
$139.00 USD - $492.00 USD
Current price $139.00 USD
Original price $8,290.00 USD - Original price $8,290.00 USD
Original price
$8,290.00 USD
$8,290.00 USD - $8,290.00 USD
Current price $8,290.00 USD

Baader Planetarium D-ERF Energy Rejection Filter - 290mm Aperture, 20mm Thickness

290mm Clear Aperture 20mm Thick Glass Substrate IR-Cut Dielectric Coating Pre-Filter for H-Alpha Solar Systems Description FAQ Specifications I...

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Original price $8,290.00 USD - Original price $8,290.00 USD
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$8,290.00 USD
$8,290.00 USD - $8,290.00 USD
Current price $8,290.00 USD
Original price $3.51 USD - Original price $286.23 USD
Original price
$3.51 USD - $286.23 USD
$3.51 USD - $286.23 USD
Current price $3.51 USD

Baader Planetarium Solar / Eclipse Viewer AstroSolar® Silver/Gold

Safe for direct, naked-eye solar viewing Ideal for observing the partial phases of a solar eclipse and large sunspot groups Available as a single ...

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Original price $3.51 USD - Original price $286.23 USD
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$3.51 USD - $286.23 USD
$3.51 USD - $286.23 USD
Current price $3.51 USD
Original price $445.00 USD - Original price $445.00 USD
Original price
$445.00 USD
$445.00 USD - $445.00 USD
Current price $445.00 USD

Baader Planetarium Solar Diaphragm 13mm - 113mm, stepless adjustable

Steplessly Adjustable Aperture: 13mm to 113mm Ideal for Optimizing Solar Views in Refractors DIY Mounting Pattern: Four M3 threads Standard Pitch ...

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Original price $445.00 USD - Original price $445.00 USD
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$445.00 USD
$445.00 USD - $445.00 USD
Current price $445.00 USD
Original price $59.00 USD - Original price $59.00 USD
Original price
$59.00 USD
$59.00 USD - $59.00 USD
Current price $59.00 USD

Baader Planetarium Solar Projection Screen (BSPS)

Safe, Enclosed Solar Projection Ideal for Group Viewing and Public Outreach Observe Sunspots, Limb Darkening, and Eclipses Compatible with T-2 Eye...

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Original price $59.00 USD - Original price $59.00 USD
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$59.00 USD
$59.00 USD - $59.00 USD
Current price $59.00 USD
Original price $71.00 USD - Original price $71.00 USD
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$71.00 USD
$71.00 USD - $71.00 USD
Current price $71.00 USD

Baader Planetarium Solar Shade with 2" drilled hole

Blocks stray sunlight to improve contrast Reduces heat buildup around the eyepiece Installs between any 2-inch threaded accessories Features a 2-i...

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Original price $71.00 USD - Original price $71.00 USD
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$71.00 USD
$71.00 USD - $71.00 USD
Current price $71.00 USD
Original price $73.00 USD - Original price $73.00 USD
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$73.00 USD
$73.00 USD - $73.00 USD
Current price $73.00 USD

Baader Planetarium Solar Shade with M68 drilled hole

Protects Imaging Equipment from Solar Heating Clamps Securely Between Any M68 Threads Reduces Tube Currents and Thermal Instability Lightweight an...

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Original price $73.00 USD - Original price $73.00 USD
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$73.00 USD
$73.00 USD - $73.00 USD
Current price $73.00 USD
Original price $70.00 USD - Original price $70.00 USD
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$70.00 USD
$70.00 USD - $70.00 USD
Current price $70.00 USD

Baader Planetarium Solar Shade with T-2 Drilled Hole

T-2 Thread-Through Design Installs Between Any T-2 System Components Shields Equipment from Direct Solar Radiation Reduces Internal Reflections an...

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Original price $70.00 USD - Original price $70.00 USD
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$70.00 USD
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Current price $70.00 USD
Original price $459.00 USD - Original price $459.00 USD
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$459.00 USD
$459.00 USD - $459.00 USD
Current price $459.00 USD

Baader Planetarium TZ-3S Telecentric System T-2 for SunDancer II and more

3x Achromatic Telecentric System Parallel beam; f/30 on f/10 telescopes Illuminates a 27.5mm Image Circle 96mm Working Distance from T-2 Thread Ba...

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Original price $459.00 USD - Original price $459.00 USD
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$459.00 USD
$459.00 USD - $459.00 USD
Current price $459.00 USD
Original price $481.00 USD - Original price $481.00 USD
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$481.00 USD
$481.00 USD - $481.00 USD
Current price $481.00 USD

Baader Planetarium TZ-4S Telecentric System T-2 for SunDancer II and more

4x Focal Length Extension 36mm Clear Aperture and Image Field Parallel beam; f/30 on f/7.5 telescopes Achromatic Design for Visual and Imaging Use...

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Original price $481.00 USD - Original price $481.00 USD
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$481.00 USD
$481.00 USD - $481.00 USD
Current price $481.00 USD
Original price $134.00 USD - Original price $223.00 USD
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$134.00 USD - $223.00 USD
$134.00 USD - $223.00 USD
Current price $134.00 USD

Baader Solar Continuum Filter

Maximizes contrast on solar granulation, faculae, and sunspot details Dramatically reduces chromatic aberration in achromatic refractors Functions...

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Original price $134.00 USD - Original price $223.00 USD
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$134.00 USD - $223.00 USD
$134.00 USD - $223.00 USD
Current price $134.00 USD
Original price $384.00 USD - Original price $384.00 USD
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$384.00 USD
$384.00 USD - $384.00 USD
Current price $384.00 USD

Baader SolarSpectrum 0.7x Telecompressor - 2"

0.7x Focal Reduction Factor Designed for SolarSpectrum H-alpha Filters Corrects for f/30 Telecentric Systems 2" Barrel and Threading Enables Full-...

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Original price $384.00 USD - Original price $384.00 USD
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$384.00 USD
$384.00 USD - $384.00 USD
Current price $384.00 USD
Original price $550.00 USD - Original price $550.00 USD
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$550.00 USD
$550.00 USD - $550.00 USD
Current price $550.00 USD

Baader SolarSpectrum Research Grade 0.4x Telecompressor - 2"

Reduces effective focal ratio by a factor of 0.4x Designed for Baader Solar Spectrum filters requiring an f/30 light path Enables viewing of the f...

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Original price $550.00 USD - Original price $550.00 USD
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$550.00 USD
$550.00 USD - $550.00 USD
Current price $550.00 USD
Original price $47.95 USD - Original price $47.95 USD
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$47.95 USD
$47.95 USD - $47.95 USD
Current price $47.95 USD

Celestron EclipSmart 10X25 Solar Binoculars

10x Magnification for detailed views of sunspots Permanently attached ISO 12312-2:2015(E) compliant solar filters Wide 5.7° angular field of view ...

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Original price $47.95 USD - Original price $47.95 USD
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$47.95 USD
$47.95 USD - $47.95 USD
Current price $47.95 USD
Original price $89.95 USD - Original price $89.95 USD
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$89.95 USD
$89.95 USD - $89.95 USD
Current price $89.95 USD

Celestron EclipSmart 10X42 Solar Binoculars

10x magnification for detailed views of sunspots and solar phenomena 42mm objective lenses with permanently integrated Solar Safe filters ISO 1231...

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Original price $89.95 USD - Original price $89.95 USD
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$89.95 USD
$89.95 USD - $89.95 USD
Current price $89.95 USD
Original price $59.95 USD - Original price $59.95 USD
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$59.95 USD
$59.95 USD - $59.95 USD
Current price $59.95 USD

Celestron EclipSmart Solar Filter - 6” SCT

Designed for Celestron 6" Schmidt-Cassegrain Telescopes Provides a 128.5mm (5.06") clear aperture for safe solar viewing ISO 12312-2:2015(E) compl...

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Original price $59.95 USD - Original price $59.95 USD
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$59.95 USD
$59.95 USD - $59.95 USD
Current price $59.95 USD
Original price $74.95 USD - Original price $74.95 USD
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$74.95 USD
$74.95 USD - $74.95 USD
Current price $74.95 USD

Celestron EclipSmart Solar Filter - 8” SCT and EdgeHD

Instantly adapts your Celestron 8” Schmidt-Cassegrain or EdgeHD telescope for solar viewing Conforms to the ISO 12312-2:2015(E) international safe...

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Original price $74.95 USD - Original price $74.95 USD
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$74.95 USD
$74.95 USD - $74.95 USD
Current price $74.95 USD
Original price $349.00 USD - Original price $349.00 USD
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$349.00 USD
$349.00 USD - $349.00 USD
Current price $349.00 USD

Daystar 0.33X Tilt Reducer

0.33X Focal Reduction Factor Designed for the Daystar Combo Quark Filter Full-Disk Imaging Possible with Small Sensors, Depending on Focal Length ...

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Original price $349.00 USD - Original price $349.00 USD
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$349.00 USD
$349.00 USD - $349.00 USD
Current price $349.00 USD
Original price $299.00 USD - Original price $299.00 USD
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$299.00 USD
$299.00 USD - $299.00 USD
Current price $299.00 USD

Daystar 0.60X Tilt Reducer

Reduces focal length by a factor of 0.6x for wider solar views Brightens the image for significantly shorter exposure times Integrated tilt mechan...

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Original price $299.00 USD - Original price $299.00 USD
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$299.00 USD
$299.00 USD - $299.00 USD
Current price $299.00 USD
Original price $52.00 USD - Original price $52.00 USD
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$52.00 USD
$52.00 USD - $52.00 USD
Current price $52.00 USD

Daystar 2" Female Adapter for Quantum

Adapts Daystar Quantum filters to a 2" female connection Features a 3" diameter mounting plate Description FAQ Specifications In the Box Warr...

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Original price $52.00 USD - Original price $52.00 USD
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$52.00 USD
$52.00 USD - $52.00 USD
Current price $52.00 USD
Original price $1,295.00 USD - Original price $1,295.00 USD
Original price
$1,295.00 USD
$1,295.00 USD - $1,295.00 USD
Current price $1,295.00 USD

Daystar Calcium Quark Solar Filter

Targets the 3968.5Å Calcium H-line Wavelength All-in-One Eyepiece-Style Solar Filter Optimized for F/7 to F/30 Refractor Telescopes Integrated 25m...

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Original price $1,295.00 USD - Original price $1,295.00 USD
Original price
$1,295.00 USD
$1,295.00 USD - $1,295.00 USD
Current price $1,295.00 USD
Original price $1,495.00 USD - Original price $1,495.00 USD
Original price
$1,495.00 USD
$1,495.00 USD - $1,495.00 USD
Current price $1,495.00 USD

Daystar Camera Quark Chromosphere Solar Filter

Transforms Canon or Nikon SLR lenses into a Hydrogen-Alpha solar telescope Integrated, H-Alpha optimized telecentric Barlow lens USB-powered, heat...

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Original price $1,495.00 USD - Original price $1,495.00 USD
Original price
$1,495.00 USD
$1,495.00 USD - $1,495.00 USD
Current price $1,495.00 USD
Original price $1,495.00 USD - Original price $1,495.00 USD
Original price
$1,495.00 USD
$1,495.00 USD - $1,495.00 USD
Current price $1,495.00 USD

Daystar Camera Quark Prominence Solar Filter

Transforms Canon or Nikon SLR lenses into a Hydrogen-Alpha solar telescope Optimized for high-contrast views of solar prominences Internal Fabry-P...

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Original price $1,495.00 USD - Original price $1,495.00 USD
Original price
$1,495.00 USD
$1,495.00 USD - $1,495.00 USD
Current price $1,495.00 USD
Original price $399.00 USD - Original price $399.00 USD
Original price
$399.00 USD
$399.00 USD - $399.00 USD
Current price $399.00 USD

Daystar Canon Lens to Quark Adapter

Adapts Canon EF-mount lenses for use with Daystar Quark solar filters Turns a telephoto lens into a portable Hydrogen-alpha solar telescope Allows...

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Original price $399.00 USD - Original price $399.00 USD
Original price
$399.00 USD
$399.00 USD - $399.00 USD
Current price $399.00 USD

Ways to Observe the Sun Safely

Different wavelengths reveal completely different Suns. White light shows the photosphere and sunspots; hydrogen-alpha shows the chromosphere with prominences and filaments; Calcium-K shows the plage network above it.

  • White-light filters: Full-aperture film or glass filters fitted in front of the objective, showing sunspots, granulation and faculae. They must always be at the front, never at the eyepiece.
  • Hydrogen-alpha telescopes: Dedicated instruments with sub-angstrom etalons that isolate the 656.28 nm line, revealing prominences at the limb and filaments and flares on the disc.
  • Solar filter modules: Etalon and blocking filter assemblies that convert a suitable refractor into a hydrogen-alpha instrument.
  • Calcium-K filters: Narrow filters at 393 nm showing the chromospheric network, best captured with a camera since the wavelength is at the edge of human sensitivity.
  • Herschel wedges: High-contrast white-light observing for refractors, diverting most solar energy out of the optical path rather than reflecting it back.
  • Solar accessories: Finders, blocking filters, tuning aids and mounting hardware designed for daytime work.

Why Choose David Astro for Solar Astronomy

This is the one category where getting the recommendation wrong has consequences beyond a disappointing view.

  • Safety verified, not assumed: We confirm that any filter is full-aperture and front-mounted, and we will not supply eyepiece-end solar filters, which can fail catastrophically under concentrated heat.
  • Aperture limits for etalon modules: Front-mounted etalons have maximum aperture and focal ratio limits, and exceeding them risks both poor performance and thermal damage. We check your telescope against them.
  • Authorized dealer: Genuine solar equipment with full manufacturer warranty, critically important in a category where counterfeit filters exist.
  • Inspection and service: We can inspect solar filters for pinholes and coating damage, which should be done before every season.

Solar Astronomy in Canada: Frequently Asked Questions

Can I use an eyepiece-mounted solar filter?

No. Filters that screw into an eyepiece sit where the telescope has concentrated the Sun's full energy, and they can crack without warning. Only full-aperture filters mounted at the front of the telescope are safe.

White light or hydrogen-alpha first?

White light is far less expensive and shows sunspots and granulation well. Hydrogen-alpha shows prominences and surface activity that white light cannot, and is the more dramatic view, at several times the cost.

How do I know my filter is still safe?

Hold it up to a bright indoor light and look for pinholes, scratches or delamination in the coating. Any visible defect means it should be replaced, not repaired or taped.

Can I observe the Sun in winter?

Yes, and low winter sun means long atmospheric path and often poor seeing, but activity is visible year round. Cold also keeps etalon tuning more stable than a hot summer afternoon does.

Starting with solar observing?

Tell us your telescope and we will confirm a safe, effective setup. Genuine filters, Canadian stock, expert guidance.