Sky-Watcher Sky-Watcher EvoGuide 50DX – 50mm Guide Scope APO Doublet Refractor –

The EvoGuide 50DX is built primarily as a guide scope for astrophotography setups, though its apochromatic ED doublet optics mean it can pull double duty as a compact astrograph with the right accessories. At 50mm aperture and 242mm focal length, the f/4.8 focal ratio keeps guide star acquisition quick and reliable, which is exactly what your autoguider needs to keep long exposures sharp. The ED glass controls chromatic aberration well for a scope in this price range, producing the clean, contrast-rich star images that make autoguiding software lock on more consistently.

It weighs just 1.22kg, so it adds minimal load to your main imaging rig, a real consideration when you are already balancing a heavy camera and telescope. Two mounting options, a finder stalk for Sky-Watcher brackets and a Vixen-style dovetail rail, give you genuine flexibility depending on your setup. The 1.25-inch helical focuser works smoothly for guide camera placement, though for serious astroimaging use you will want to add the optional T-thread adapter separately.

At $299, this is a premium guide scope price point, but the apochromatic optics justify the cost if you want reliable guiding performance and occasional wide-field imaging capability in one package.