Celestron NexStar 130SLT vs SkyWatcher S20204 Quattro Coma Corrector (Black)

The Celestron NexStar 130SLT is the clear winner here, though this comparison reveals an unusual situation. The SkyWatcher S20204 Quattro Coma Corrector is not a complete telescope; it is an optical accessory designed to improve coma aberration in fast Newtonian reflectors. Comparing it directly to a finished instrument is misleading. The fundamental differentiator is that the Celestron NexStar 130SLT is a functional, ready-to-observe telescope with computerized GoTo and tracking capability, while the SkyWatcher S20204 is merely a lens element that requires a separate telescope tube and mount to be useful.

This explains the dramatic score disparity across every category. The Celestron NexStar 130SLT suits observers seeking computerized convenience and broad capability across deep sky, planetary, and astrophotography work. The SkyWatcher S20204 is for experienced observers who already own a suitable fast Newtonian reflector and want to reduce optical aberration in their existing setup. For the vast majority of amateur astronomers, the Celestron NexStar 130SLT deserves your consideration.

It delivers solid performance at a reasonable price with the automation features that enhance observing sessions. Only purchase the SkyWatcher S20204 if you already own a compatible Newtonian and understand its specific optical purpose.