Comparison
The Celestron StarSense Explorer 12" Dob wins for serious deep sky and planetary observing, while the Sky-Watcher FlexTube 250P suits those prioritizing portability and ease of use. The single most important differentiator is aperture; the Celestron's 305mm mirror gathers significantly more light than the Sky-Watcher's 254mm, delivering noticeably brighter views of faint galaxies, nebulae, and subtle planetary details. This advantage justifies the higher price and weight penalty for observers willing to invest effort.
Buy the Celestron StarSense Explorer 12" Dob if you have a dedicated observing location and want maximum performance for deep sky observation. Buy the Sky-Watcher FlexTube 250P if you value portability, plan frequent trips to dark sites, or are upgrading from smaller telescopes and want something manageable. The Celestron's automated StarSense tracking and superior deep sky score (67 versus 55) make it the better choice for committed amateurs willing to accept its 38kg weight.
The Sky-Watcher's collapsible tube design and half the mass make it genuinely portable. For pure observing satisfaction with minimal setup frustration, choose the Celestron; for flexibility and accessibility, choose the Sky-Watcher.
Why choose Celestron StarSense Explorer
Why choose Sky-Watcher FlexTube 250P