Jaahas Celestronilta napsahti sitten seuraavanlaista sähköpostia asiaan Liittyen. Kun tuli kysyttyä et mistä se voisi olla.
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Thank you for contacting Celestron Technical Services.
The o-ring could be from the focusing or the baffle tube. There is no need to try to install it. The cap should be removed. Otherwise it will get grease on the optics.
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