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Orion StarSeeker IV 150mm Reflector Telescope Review

12 Jul 2019, 05:29 UTC
Orion StarSeeker IV 150mm Reflector Telescope Review
(200 words excerpt, click title or image to see full post)

Orion’s StarSeeker IV 150mm Reflector (not to be confused with their 150mm Maksutov-Cassegrain) has a number of features that I applaud. However, some of the design elements are questionable, or at least unproven. This being said, it is still a pretty nice telescope.
Note: This same telescope is sold as the Sky-Watcher Star Discovery 150P outside the US, and has the same features and flaws as described in this review – with the exception of including slightly different eyepieces and a Barlow lens.
The Optical Tube Of StarSeeker IV
The StarSeeker IV 150mm Reflector is a 6” f/5 Newtonian with a 750mm focal length. These are fairly common scopes, especially for beginning visual users or astro-imagers. However, the scope deviates from most of the common 6” Newtonians out there in the form of the primary and secondary mirror supports.
The secondary mirror is held in place by a spider made of ABS plastic, with rods instead of spider vanes. On a 4” scope this would be acceptable, but with a 6” f/5 these rods are of such a size that they introduce additional, unnecessary diffraction to the telescope and smear the image slightly more than regular spider vanes, slightly reducing ...

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