CELESTRON 94248 Solar Filter User Manual
- June 3, 2024
- Celestron
Table of Contents
94248 Solar Filter
User Manual
SOLAR FILTER
94248 for Sarsens Explorer LT 114 & Power Seeker 114
94249 for AstroMaster 114 EQ & 114AZ-SR
94250 for AstroMaster 130 EQ
The solar filter material used in this product:
- Conforms to and meets the Transmission Requirements of ISO 12312-2, Filters for Direct Observation of the Sun.
- Meets the Transmission Requirements of EN 1836:2005 + A1:2007 (E) for an E15 Filter for the Direct Observation of the Sun.
- Meets the Transmission Requirements of AS/ NZS 1338.1:2012, Filters for Eye Protectors. EC Type Examination by: SAI Global Assurance Services Ltd. (Notified Body No. NB2056), MK5 8HJ U.K.
SOLAR WARNING
Even though your EclipSmart solar filter is equipped with ISO certified material that allow safe direct observation of the Sun, there are still some important rules you should follow when solar observing:
- Never look directly at the Sun with the naked eye or with a telescope unless you have the proper solar filter. Permanent and irreversible eye damage may result.
- Never use a telescope to project an image of the Sun onto any surface. Internal heat build-up can damage the telescope and any accessories attached to it.
- Never use an eyepiece solar filter or a Herschel wedge. Internal heat build-up inside the telescope can cause these devices to crack or break, allowing unfiltered sunlight to pass through to the eye.
- Do not leave the telescope unsupervised, especially when children or adults unfamiliar with the correct operating procedures of your telescope are present.
HANDLING THE FILTER
When handling the filter, hold it by the outer edges of the plastic filter cell. Do not touch or make contact with the filter material. Do not use any cleaning chemicals or brushes to clean the material. If you need to remove dust from the filter, use compressed air to blow it clean. Small smudges or fingerprints will not affect the filter’s performance. When you are not using the filter, store it in its original box.
INSTALLING THE FILTER
Before installing your filter, remove the protective cap (if your filter has
one) and inspect its surface carefully under a bright light source.
If you see holes or damage to the surface of the filter, do not use it.
When you are ready to install the filter, remove your telescope’s lens cap and
replace it with the solar filter. Each filter is based on the design of your
telescope’s lens cap and should fit snugly.
The filter slides inside of the front cell of your telescope. Spin the entire
cap so that the filter fits between your secondary mirror’s spider vanes, free
from obstruction. To attach the safety straps, peel the backing off two of the
1” x 1” self-adhesive Velcro tabs and stick them on opposite sides of the top
surface of the filter (Figure 1).
With the filter
installed, stick the remaining two 1” x 1” tabs on the side of the telescope’s
front cell immediately adjacent to the tabs you placed on the top surface of
the filter (Figure 2). Use the two 4” Velcro strips to connect each pair of
tabs and secure the filter to the telescope (Figure 3).
REMOVE THE FINDERSCOPE
When observing the Sun, you should completely remove the optical finder scope
from the telescope. Allowing the Sun to shine through an optical finder scope
will result in a focused beam of sunlight that can cause burns or permanent
damage to the finder scope. Never rely on the lens caps to stay secured to the
finder scope. If you’re concerned you won’t be able to point the telescope at
the Sun without a finder scope, don’t worry. Locating the Sun without a finder
scope is very simple, as we’ll explain in the next
section.
LOCATING THE SUN IN THE TELESCOPE
Without directly looking at the Sun, turn the scope so the filter is pointed
in the Sun’s general direction. Next, turn around and look at the telescope’s
shadow on the ground. Move the scope to adjust its position until the
telescope tube’s shadow appears perfectly round.
If you are slightly off, the shadow will appear oval or elongated. When you
have pointed the telescope correctly, the Sun should be within the field of
view of your lowest power eyepiece. If it is not, look through the eyepiece
and slowly move the scope in a circular pattern. You should find it in no
time.
The Sun will appear as an orange disk in the eyepiece. Use your telescope’s
focusing knobs as you normally would until the edge of the solar disk appears
sharp.
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Conforms to and meets the Transmission
Requirements of ISO 12312-2,
Filters for Direct Observation of the Sun
© 2022 Celestron All rights reserved
celestron.com/pages/technical-support
2835 Columbia Street Torrance, CA 90503 U.S.A.
Product design and specifications are subject to change without
prior notification. This product is designed and intended for use
by those 14 years of age and older.
Documents / Resources
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CELESTRON 94248 Solar
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[pdf] User Manual
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