Will the EclipSmart filter fit non-Celestron 8" telescopes?
This filter is custom-designed with a 225mm internal diameter to fit Celestron 8" SCT and EdgeHD optical tubes. While it might fit other telescopes with similar dimensions, you must verify the outer diameter of your specific telescope to ensure a safe, secure fit before purchasing. An unsecured filter is extremely dangerous.
How do I attach the EclipSmart Solar Filter to my NexStar 8SE?
To attach the filter, remove the telescope's lens cap and fit the filter in its place. Stick two of the 1" x 1" self-adhesive hook-and-loop tabs on opposite sides of the top surface of the filter, and the other two on the side of the telescope's front cell right next to them. Then use the two 1" x 4" straps to connect each pair of tabs. Always check that the filter is secure before pointing the telescope at the Sun.
Can I see solar flares or prominences with the EclipSmart filter?
No. This is a white-light solar filter, designed for observing the Sun's surface (photosphere), which includes sunspots, granulation, and planetary transits. Solar flares and prominences are features of the chromosphere and require a specialized, narrow-band Hydrogen-alpha (H-alpha) telescope or filter to be seen.
What is the difference between the 176mm clear aperture and the 225mm internal diameter?
The 225mm internal diameter refers to the size of the filter's housing, designed to slip over the front of your 8" telescope. The 176mm clear aperture is the usable diameter of the solar filter material itself. It is smaller than the 203mm (8") aperture of the telescope, so the filter slightly reduces the effective aperture.
How do I clean and store my EclipSmart solar filter?
Hold the filter by the outer edges of its plastic cell and avoid touching the filter material. Do not use cleaning chemicals or brushes on the filter material; if it is dusty, blow it clean with compressed air. Small smudges or fingerprints will not affect its performance. Always inspect the filter for scratches or damage before each use. When not in use, store it in its original box.
Is it safe to use this EclipSmart filter for imaging the Sun with my CPC 800?
Yes. The EclipSmart filter is safe for both visual observation and solar imaging. Because it fits over the front of the telescope, it rejects the Sun's energy before it enters the optical tube, keeping the internal components cool and safe. You can attach a planetary camera or DSLR to your CPC 800 as you normally would for astrophotography.
