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Determining the Correct Orion Solar Filter for your Telescope
A full-aperture solar filter is designed to fit over the front of a telescope. It allows safe viewing of the Sun by reducing the light by 99.99% and preventing concentrated heat from entering the telescope, which could cause injury to the user or damage to equipment.
If your telescope is not listed on our solar filter reference chart, you can determine the size of filter needed for your scope by taking the following steps:
- Measure the maximum outside diameter (OD) of the front end of your telescope.
- The solar filter sizes listed in our catalog and on our website refer to the inner diameter (ID) of the filter's foam-lined metal cell for Orion Solar Filters, which slip over the front of the telescope. Choose a filter whose size matches the OD of your telescope's front end, or that is up to 0.25 inches larger than the front end (for Orion Solar Filters only). For a filter that is up to 0.25" larger in diameter than your telescope, apply the supplied adhesive foam tabs as needed to the inside wall of the cell until the cell fits snugly over the front opening. (Note: The thumbscrews on Orion Solar Filters are not intended as the sole means of securing the filter to your optical tube. A tight friction fit is required for safe usage.)
Installing the Orion Solar Filter on Your Telescope
With the three thumbscrews backed out to just inside the wall of the metal cell, place the solar filter over the outside of the telescope. It may require some light force to push the filter in place. Make sure it is seated completely over the telescope. Then lightly tighten the thumbscrews to further secure the filter on the telescope.
| Solar Filter for Telescopes Reference Guide | ||
|---|---|---|
| Item # | Size | Fits |
| 07745 | 3.68" | Orion Observer 60 Altazimuth Refractor Telescope |
| 07733 | 4.10" | Orion ShortTube 80 Refractor Telescope, Orion Observer 70 Altazimuth and Equatorial Telescopes, Orion AstroView 80 and 90 Equatorial Refractor Telescopes, Orion Explorer 80 and 90 Altazimuth Refractor Telescopes, Orion Express 80 Refractor Telescope, Orion 90mm Maksutov-Cassegrain Telescopes, Orion ED80T CF Triplet Apochromatic Refractor Telescope, Meade ETX-90 Maksutov-Cassegrain Telescope, Orion EON 72mm ED Apochromatic Refractor Telescope, Orion StarSeeker 80 Computerized GoTo Refractor Telescope |
| 07730 | 4.30" | Orion Transporter 70mm Min-EQ Refractor Telescope, Orion GoScope 70 Backpack Refractor Telescope, Orion EON 80mm ED Apochromatic Refractor Telescope |
| 07798 | 4.57" | Orion 102mm Maksutov-Cassegrain Telescope, Orion AstroView 100 Equatorial Refractor Telescope, Orion SkyView Pro 100 Refractor Telescope, Orion 80ED and 100ED Refractor Telescopes, Celestron and Orion StarSeeker 100 Computerized GoTo Refractor Telescopes |
| 07710 | 5.81" | Orion AstroView 120 and 120ST, SkyView Pro 120, StarBlast 4.5, ED 120, Orion StarMax 127, SkyView Pro 127, Apex 127, Orion ShortTube 4.5, SkyQuest XT4.5, Orion StarBlast 4.5 EQ, Orion 120mm f/5.0 Refractor Telescope OTA, Celestron and Orion StarSeeker 114mm Computerized GoTo Reflector Telescopes |
| 07737 | 6.58" | Orion SpaceProbe 130 and 130ST Equatorial Reflector Telescopes, Celestron and Orion StarSeeker 130mm Computerized GoTo Reflector Telescopes |
| 07723 | 7.17" | Orion SkyQuest XT6 Classic and IntelliScope Dobsonian Telescopes, Orion XT 6" Classic Build A Scope, 6" Intelliscope Build a Scope, Orion AstroView 6 Equatorial Telescope, Orion StarBlast 6 and 6i Mini-Dobsonian Telescopes |
| 07781 | 7.52" | Orion SkyView Pro 150 Maksutov-Cassegrain Telescope |
| 07722 | 9.25" | Orion SkyQuest XT8 Classic, IntelliScope, GoTo and Build-A-Scope Dobsonian Telescopes, Orion SkyView Pro 8 Equatorial and Computerized GoTo Reflector Telescopes, 8" Schmidt-Cassegrain Telescopes, 8" Astrograph |
| 07782 | 10.56" | 9.25" Schmidt-Cassegrains, Celestron CPC 925 |
| 07783 | 11" | 11" Schmidt-Cassegrains |
| 07715 | 11.63" | 10" Schmidt-Cassegrains, 10" Astrograph |
| 07790 | 12.13" | Orion SkyQuest XT10 Classic, IntelliScope, GoTo and Build-A-Scope Dobsonian Telescopes, Orion Atlas 10 Reflector Telescopes |
| 07725 | 14.21" | Orion SkyQuest XT12 Classic, IntelliScope, GoTo Dobsonian Telescopes (off-axis 4" filter), Orion SkyQuest XX12i IntelliScope Truss-Tube Dobsonian Telescope, Orion 12" Intelliscope Build a Scope, Orion XX 12i Truss Build a Scope |
| Safety Film Solar Filter for Telescopes Reference Guide | ||
| Item # | Size | Fits |
| 07747 | 4.5" | Orion StarBlast 4.5 Astro and Equatorial Reflector Telescopes, Orion SkyQuest Classic XT4.5 Dobsonian Reflector Telescopes, Orion StarBlast 4.5 Imaging Reflector Telescope Optical Tube |
| 07748 | 6" | Orion StarBlast 6 Astro and IntelliScope Reflector Telescopes; Orion SkyQuest Classic XT6, Orion IntelliScope XT6i Dobsonian Reflector Telescopes, Orion AstroView 6 Equatorial Reflector Telescope |
| 07749 | 8" | Orion SkyView Pro and Sirius 8 Equatorial Reflector Telescopes, SkyQuest Classic XT8, IntelliScope XT8i, XT8g GoTo Dobsonian Reflector Telescopes, 8" Astrograph |
