Assertion: telescope | /r/HasAspect | focuser
Facets:
Source sentences:
text: not all telescopes have a focuser that can accept a 2" fitting or could not make use of it if they did.
text: The disadvantages are that these eyepieces are somewhat rare, extremely expensive, up to 5 lbs in weight, and that only a few telescopes have focusers large enough to accept them.
text: The disadvantages are that these eyepieces are somewhat rare, extremely expensive, up to 5 lbs in weight, and that only a few telescopes have focusers large enough to accept them.