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Like many cheap beginner reflectors, the Orion SkyScanner 1oomm does not include provisions for collimating its primary mirror. Two screw holes are also drilled into the dovetail so it can be used with a standard photo tripod. The dovetail would allow the telescope to be mounted on mounts other than the tabletop dob that it comes with, such as an EQ-1 German Equatorial Mount. The telescope tube has a vixen-style dovetail mount with three divots for the mounting lock bolt to grab onto for three different possible balance positions. (This will also reduce the maximum magnification of the telescope, however) The dust cap is two-part, so the inner cap can be removed to stop down the aperture for dimmer lunar viewing, which is useful especially during the fuller phases. The tube is outfitted with a Rack-And-Pinion focuser for 1.25” eyepieces which works fine, and fittings for a finderscope. It looks great on display and is plenty bright when seen outside with a red light. The optical tube is given a shiny pearly red paint job. But since the telescope doesn’t come with high power eyepieces, it won’t be easy to notice this. This is hard to notice but it will result in a slightly fuzzier image at very high magnifications. While the parabolic mirror is the correct shape for a Newtonian telescope, it is not a diffraction-limited shape like more expensive Newtonians. As a result, the telescope is good for wide-field views (showing a large part of the sky at low magnification) without needing large wide-field eyepieces. The SkyScanner’s Newtonian optical tube contains a parabolic primary mirror 100mm (4 inches) in diameter with a focal length of 400mm, yielding a fast focal ratio of f/4. Skyscanner’s Newtonian Optical Tube Performance Looking down the SkyScanner’s optical tube Few telescopes in this price range are as fun and easy to use and show as much. The only thing which lets it down is the eyepiece position, and that may not be a problem for everyone.
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Orion Skyscanner 100mm is a very portable telescope and can easily be stowed away in the trunk or a car seat or carried with you as it is easy to grab and go. The StarMax 90mm is an option for higher magnification viewing.
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If you have a flexible budget, consider the Zhumell Z114, AWB OneSky 5” Tabletop Dobsonian (Sold outside the USA as the SkyWatcher Heritage 130P), the StarBlast 4.5” TableTop Dobsonian, or the Meade EclipseView 114, which includes a solar filter. Tabletop Dobsonians are practically the only worthwhile options in this price range. These are basically “hobby killer” telescopes, but even more expensive than the (justly) maligned “department store refractors.” Or worse, left out on the sidewalk for someone else to take and try to use. They have tiny apertures and mounts so un-fun they end up being left in the attic, never being used.
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The Celestron PowerSeeker and AstroMaster series both have entries in this price range, and they are not at all worth it. Many telescopes in this price range, even those sold by well-known brands like Celestron, Meade, and even Orion, are garbage refractors on cheap, finicky mounts. In the same price range, only Zhumell Z100 is a better choice. Compared to the lower-priced telescopes, the Orion SkyScanner 100mm blows it out of the water optically.