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  • Spectrum Full Aperture Glass Solar Filter for 41 mm - 48 mm Outside Diameter Telescopes
    Spectrum Telescope Spectrum Full Aperture Glass Solar Filter for 41 mm - 48 mm OD Telescopes - ST200G
    $62.00
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  • Spectrum Full Aperture Glass Solar Filter for 48 mm - 54 mm OD Telescopes
    Spectrum Telescope Spectrum Full Aperture Glass Solar Filter for 48 mm - 54 mm OD Telescopes - ST225G
    $62.00
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  • Spectrum Telescope ST275G Full Aperture Glass Solar Filter
    Spectrum Telescope Spectrum Full Aperture Glass Solar Filter for 60 mm - 67 mm OD Telescopes - ST275G
    $72.00
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  • Spectrum Full Aperture Glass Solar Filter for 67 mm - 73 mm Outside Diameter Optical Tubes
    Spectrum Telescope Spectrum Full Aperture Glass Solar Filter for 67 mm - 73 mm OD Telescopes - ST300G
    $72.00
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  • Spectrum Telescope ST325G Full Aperture Glass Solar Filter
    Spectrum Telescope Spectrum Full Aperture Glass Solar Filter for 73 mm - 79 mm OD Telescopes - ST325G
    $72.00
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  • Spectrum Telescope ST350G Full Aperture Glass Solar Filter
    Spectrum Telescope Spectrum Full Aperture Glass Solar Filter for 79 mm - 86 mm OD Telescopes - ST350G
    $72.00
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  • Spectrum ST375G Full Aperture Glass Solar Filter - 95 mm ID
    Spectrum Telescope Spectrum Full Aperture Glass Solar Filter for 86 mm - 92 mm OD Telescopes - ST375G
    $72.00
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  • Spectrum 101 mm ID Full Aperture Glass Solar Filter
    Spectrum Telescope Spectrum Full Aperture Glass Solar Filter for 92 mm - 98 mm OD Telescopes - ST400G
    $72.00
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  • Spectrum ST425G 108 mm ID Full Aperture Glass Solar Filter
    Spectrum Telescope Spectrum Full Aperture Glass Solar Filter for 98 mm - 105 mm OD Telescopes - ST425G
    $82.00
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  • Spectrum Full Aperture Glass Solar Filter - 114 mm ID
    Spectrum Telescope Spectrum Full Aperture Glass Solar Filter for 105 mm - 111 mm OD Telescopes - ST450G
    $82.00
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  • Spectrum Telescope Full Aperture Glass Solar Filter for 111 mm - 117 mm Outside Diameter Telescopes
    Spectrum Telescope Spectrum Full Aperture Glass Solar Filter for 111 mm - 117 mm OD Telescopes - ST475G
    $82.00
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  • Spectrum Telescope 127 mm ID Full Aperture Glass Solar Filter
    Spectrum Telescope Spectrum Full Aperture Glass Solar Filter for 117 mm - 124 mm OD Telescopes - ST500G
    $82.00
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  • Spectrum 133 mm ID Full Aperture Glass Solar Filter for 124 mm - 130 mm OD Telescopes
    Spectrum Telescope Spectrum Full Aperture Glass Solar Filter for 124 mm - 130 mm OD Telescopes - ST525G
    $82.00
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  • Spectrum Telescope ST575G Full Aperture Glass Solar Filter with 146 mm ID
    Spectrum Telescope Spectrum Full Aperture Glass Solar Filter for 137 mm - 143 mm OD Telescopes - ST575G
    $102.00
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  • Spectrum 152 mm ID Full Aperture Glass Solar Filter
    Spectrum Telescope Spectrum Full Aperture Glass Solar Filter for 143 mm - 149 mm OD Telescopes - ST600G
    $102.00
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  • Spectrum Telescope Full Aperture Glass Solar Filter for 149 mm - 156 mm Outside Diameter Telescopes
    Spectrum Telescope Spectrum Full Aperture Glass Solar Filter for 149 mm - 156 mm OD Telescopes - ST625G
    $102.00
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  • Spectrum Telescope Full Aperture Glass Solar Filter with 165 mm Inside Diameter
    Spectrum Telescope Spectrum Full Aperture Glass Solar Filter for 156 mm - 162 mm OD Telescopes - ST650G
    $102.00
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  • Spectrum 181 mm ID Full Aperture Glass Solar Filter
    Spectrum Telescope Spectrum Full Aperture Glass Solar Filter for 171 mm - 178 mm OD Telescopes - ST712G
    $112.00
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  • Spectrum 190 mm ID Full Aperture Glass Solar Filter
    Spectrum Telescope Spectrum Full Aperture Glass Solar Filter for 181 mm - 187 mm OD Telescopes - ST750G
    $112.00
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  • Spectrum Telescope Full Aperture Glass Solar Filter - 203 mm ID
    Spectrum Telescope Spectrum Full Aperture Glass Solar Filter for 194 mm - 199 mm OD Telescopes - ST800G
    $112.00
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  • Spectrum 212 ID Full Aperture Glass Solar Filter with 6
    Spectrum Telescope Spectrum Full Aperture Glass Solar Filter for 203 mm - 210 mm OD Telescopes - 6" Clear Aperture - ST8376G
    $112.00
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  • Spectrum 212 mm ID Full Aperture Glass Solar Filter with 7
    Spectrum Telescope Spectrum Full Aperture Glass Solar Filter for 203 mm - 210 mm OD Telescopes - 7" Clear Aperture - ST8377G
    $112.00
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  • Spectrum Telescope Full Aperture Glass Solar Filter for 213 mm - 219 mm OD Telescopes
    Spectrum Telescope Spectrum Full Aperture Glass Solar Filter for 213 mm - 219 mm OD Telescopes - ST875G
    $112.00
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  • Spectrum Full Aperture Glass Solar Filter for 232 mm - 238 mm Outside Diameter Telescopes
    Spectrum Telescope Spectrum Full Aperture Glass Solar Filter for 232 mm - 238 mm OD Telescopes - ST950G
    $132.00
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  • Spectrum Telescope Full Aperture Glass Solar Filter with 247 mm Inside Diameter
    Spectrum Telescope Spectrum Full Aperture Glass Solar Filter for 238 mm - 244 mm OD Telescopes - ST975G
    $132.00
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  • Spectrum Telescope 254 mm ID Full Aperture Glass Solar Filter
    Spectrum Telescope Spectrum Full Aperture Glass Solar Filter for 244 mm - 251 mm OD Telescopes - ST1000G
    $132.00
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  • Spectrum Full Aperture Glass Solar Filter for 257 mm - 264 mm Outside Diameter Telescopes - 266 mm ID
    Spectrum Telescope Spectrum Full Aperture Glass Solar Filter for 257 mm - 264 mm OD Telescopes - ST1050G
    $132.00
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  • Spectrum Full Aperture Glass Solar Filter with 273 mm Inside Diameter
    Spectrum Telescope Spectrum Full Aperture Glass Solar Filter for 264 mm - 273 mm OD Telescopes - ST1075G
    $152.00
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  • Spectrum Telescope Full Aperture Glass Solar Filter for 283 mm - 289 mm OD Telescopes
    Spectrum Telescope Spectrum Full Aperture Glass Solar Filter for 283 mm - 289 mm OD Telescopes - ST1150G
    $152.00
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  • Spectrum 305 mm Inside Diameter Full Aperture Glass Solar Filter
    Spectrum Telescope Spectrum Full Aperture Glass Solar Filter for 295 mm - 302 mm OD Telescopes - ST1200G
    $152.00
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  • Spectrum Full Aperture Glass Solar Filter for 308 mm - 314 mm Outside Diameter Telescopes
    Spectrum Telescope Spectrum Full Aperture Glass Solar Filter for 308 mm - 314 mm OD Telescopes - ST1250G
    $182.00
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  • Spectrum Full Aperture Glass Solar Filter for 321 mm - 327 mm OD Telescopes
    Spectrum Telescope Spectrum Full Aperture Glass Solar Filter for 321 mm - 327 mm OD Telescopes - ST1300G
    $182.00
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  • Spectrum 349 mm ID Full Aperture Glass Solar Filter
    Spectrum Telescope Spectrum Full Aperture Glass Solar Filter for 340 mm - 346 mm OD Telescopes - ST1375G
    $182.00
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  • Spectrum Telescope Full Aperture Glass Solar Filter for 358 mm - 365 mm Outside Diameter Telescopes
    Spectrum Telescope Spectrum Full Aperture Glass Solar Filter for 358 mm - 365 mm OD Telescopes - ST1450G
    $182.00
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  • Spectrum Telescope Full Aperture Glass Solar Filter with 387 mm Inside Diameter
    Spectrum Telescope Spectrum Full Aperture Glass Solar Filter for 378 mm - 384 mm OD Telescopes - ST1525G
    $182.00
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  • Spectrum Telescope 400 mm ID Full Aperture Glass Solar Filter
    Spectrum Telescope Spectrum Full Aperture Glass Solar Filter for 391 mm - 397 mm OD Telescopes - ST1575G
    $202.00
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  • Spectrum Full Aperture Glass Solar Filter for 397 mm - 403 OD Telescopes
    Spectrum Telescope Spectrum Full Aperture Glass Solar Filter for 397 mm - 403 mm OD Telescopes - ST1600G
    $202.00
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  • Spectrum Full Aperture Glass Solar Filter for 51 mm - 57 mm OD Telescopes
    Spectrum Telescope Spectrum Full Aperture Glass Solar Filter for 51 mm - 57 mm OD Telescopes - ST250G
    $62.00
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  • Spectrum 237 mm ID Full Aperture Glass Solar Filter
    Spectrum Telescope Spectrum Full Aperture Glass Solar Filter for 224 mm - 238 mm OD Telescopes - ST9312G
    $132.00
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  • Spectrum Thread-On Solar Film Filter for 37 mm Camera Lens
    Spectrum Telescope Spectrum 37 mm Threaded Optical Solar Film Filter - ST-37MM
    $49.00
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Spectrum Telescope designs a full array of solar filters to suit your needs. This includes full aperture glass filters as well as threaded optical film filters. While a film filter is often a budget-friendly option, a glass filter is more sturdy; which type you choose depends on what you decide to use the Spectrum solar filter for. Both glass and film filters are white light solar filters. This means these are neutral density filters, and will not distort the colors visible. However, due to the nature of white light solar filters, over 99.99% of sunlight is blocked. These factors mean a white light filter will typically show the Sun white in color, although many show the Sun in a yellow-orange color that we are familiar with.


Although these filters block over 99.99% of the Sun’s harmful rays, they allow the full wavelength spectrum to shine through. This means you will see the Sun’s photosphere. The photosphere is often considered the easiest layer of the Sun to see because it generates the most amount of light. At this layer, you will be able to see sunspots, solar flares, and even granulation, the texture of the Sun’s surface.


Spectrum Telescope’s solar filters come in many sizes to fit your telescope or finderscope. You will find the full aperture glass filter anywhere from 41mm to 403mm. The threaded optical film filters are available in 37mm to 82mm sizes.


There are certain precautions you must take in order to safely view the Sun. Before viewing, always inspect your filters and accessories and do not use if there is any sign of damage. Older solar filters recommend discarding the product after 3 years, as the filter gradually loses its effectiveness. However, this is not the case for many modern Sun-viewing accessories. Always consult an expert to confirm if you can safely use your older solar filters.

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