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.
Great tool for collimating a Newtonian or Cassegrain telescope. This item should be used with Takahashi collimating tube (sold separately).... Learn MoreModel#: TCE0020
Tube with crosshair for use with collimating eyepiece (sold separately). For collimating Newtonian telescopes.... Learn MoreModel#: TCE0030