Collimation is crucial to how a telescope performs. Using collimators to narrow and align the light beams is highly recommended for most telescopes, especially reflectors.
Tube with crosshair for use with collimating eyepiece (sold separately). For collimating Newtonian telescopes.... Learn MoreModel#: TCE0030
Great tool for collimating a Newtonian or Cassegrain telescope. This item should be used with Takahashi collimating tube (sold separately).... Learn MoreModel#: TCE0020