![]() ![]() The focal length of the ST's 130mm (5.1") primary mirror is 650mm (f/5), yielding a wider field of view and brighter images for a given telescope eyepiece focal length. The 130ST reflector telescope's optical tube measures 24" long compared to 33" on the standard 130. This "ST", or "Short Tube", version of the SpaceProbe 130 reflector is indeed more compact than the standard model. Just what's so nifty about the Orion SpaceProbe 130ST Equatorial Reflector Telescope? The answer is best described as "short and sweet."įirst, the short. The Orion SpaceProbe 130ST EQ Reflector Telescope is a step up from the standard SpaceProbe 130 EQ for the more serious beginning or intermediate stargazer who wants additional performance, particularly for targeting deep-sky objects. Our largest aperture SpaceProbe reflector telescope is the niftiest Newtonian reflector on an equatorial mount we've seen in a long time.
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