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White collapsible Dobsonian telescope with open truss tube and wooden base

Sky-Watcher

Sky-Watcher Flextube 250P 10" Collapsible Dobsonian Telescope

SKU CH-43GC-S3PXA

A collapsible 10" Dobsonian with 254mm aperture and 508x magnification for detailed deep-sky viewing

  • 254mm aperture gathers ample light for detailed celestial views
  • collapsible Flextube design reduces length for easy transport and storage
  • 2" Crayford-style focuser with 1.25" adapter enables fine-tuned focus adjustments
  • up to 508x magnification reveals intricate planetary and deep-sky details
  • parabolic Newtonian optics deliver exceptional clarity with minimal distortion

Who it is for

The Sky-Watcher Flextube 250P is a 10-inch collapsible Dobsonian telescope built for avid amateur astronomers who want large-aperture performance with easier transport. Its truss-support design lets the optical tube collapse so one person can move and store it without help.

Interface limits

The telescope uses a 2-inch Crayford-style focuser with a 1.25-inch adapter, giving fine-tuned focus control across a wide range of eyepieces. The practical magnification ceiling is 508x, beyond which atmospheric seeing and optical limits degrade the view regardless of the eyepiece used.

Capacity and headroom

The 254mm aperture gathers enough light to show structure in nebulae such as M8, M17, M20 and the Rosette, plus detail in galaxies like M33 and globular clusters M13 and M92. At 508x the views of planets and lunar surfaces remain sharp, but smaller apertures cannot match this brightness and resolution for deep-sky targets.

Highlights

  • 254mm aperture gathers ample light for detailed celestial views
  • collapsible Flextube design reduces length for easy transport and storage
  • 2" Crayford-style focuser with 1.25" adapter enables fine-tuned focus adjustments
  • up to 508x magnification reveals intricate planetary and deep-sky details
  • parabolic Newtonian optics deliver exceptional clarity with minimal distortion

Specifications

No published specifications for this item yet.

Questions about this item

Should I choose the 254 mm aperture version or a smaller model?

The 254 mm aperture gathers substantially more light than smaller models, revealing fainter nebulae such as M8, M17, M20 and galaxies like M33 with noticeably better contrast and detail.

What does the 508× magnification figure mean when I am actually observing?

508× is the theoretical maximum with the supplied eyepieces; in practice atmospheric seeing usually limits useful planetary detail to lower powers, while deep-sky objects are best viewed at much lower magnifications for wider fields.

How does the 2″ Crayford focuser with 1.25″ adapter limit the eyepieces I can use?

The 2″ drawtube accepts large 2″ eyepieces for expansive low-power views, and the included 1.25″ adapter lets you use standard 1.25″ oculars without any additional accessories.

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