Celestron 7x50 SkyMaster Pro ED Binoculars - Manual (Page 10)

10 I ENGLISH
ATTACHING FILTERS
Celestron SkyMaster Pro ED binoculars feature a 1.25” astronomical filter-compatible eyepiece
design. To attach a filter to an eyepiece:
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Position the binocular’s eyecup in the fully retracted position.
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Carefully align the filter’s threads with the threads surrounding the eyepiece lens.
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Twist the filter gently so that the threads engage smoothly and continue turning until the filter
reaches a natural stopping point.
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Repeat the process with the other eyepiece.
For the most comfortable use of the binocular with filters mounted into the eyepieces, position the
eyecups in the fully extended positions so that the rims of the eyecups are higher than the top edge
of the filters.