Sky-Watcher · Dobsonian
Sky-Watcher FlexTube 300P
305mm of light-gathering power in a collapsible GoTo Dobsonian you can actually transport.
Price updated Mar 22, 2026
Performance Scores
Overview
The Sky-Watcher FlexTube 300P gives you a 305mm (12-inch) aperture in a design that folds down for transport and storage, which is a real practical advantage at this size. At f/4.9 and 1500mm focal length, this mirror gathers enough light to show you globular clusters resolved to their cores, galaxy dust lanes, planetary nebulae, and fine detail on Jupiter and Saturn. The GoTo and tracking systems are a genuine bonus for a Dobsonian at this price, letting the mount find and follow objects automatically once aligned, which is particularly helpful for newer observers still learning the sky.
The fully multi-coated borosilicate mirrors with 94% reflectivity mean you are losing very little light before it reaches your eye. The included 25mm and 10mm super wide-angle eyepieces give you a usable starting range, though most observers will eventually want additional eyepieces to get the most from this aperture. Worth noting: the Amazon rating sits at 3.6 out of 5 across 48 reviews, suggesting some buyers have encountered quality control or setup issues.
Collimation and motor calibration deserve careful attention out of the box. At $1,895, this is a serious instrument that rewards patience during setup.
At a Glance
305mm
Aperture
f/4.9
Focal Ratio
15.88kg
Weight
1500mm
Focal Length
Specifications
Key Features
- 305mm aperture delivers enough light to resolve fine detail in deep-sky objects and reveal subtle planetary features
- Collapsible strut design reduces storage length significantly, making a 12-inch Dobsonian genuinely portable
- GoTo and tracking motors allow automatic object location and tracking, useful for both beginners and experienced observers
- 94% reflective fully multi-coated borosilicate mirrors maximize light throughput compared to standard coatings
- Crayford-style focuser with 2-inch barrel and 1.25-inch adapter supports a wide range of eyepieces
- Included 8x50 right-angle finder scope is a practical tool for initial alignment and star-hopping
- Proprietary tension control handles allow smooth manual movement without requiring precise balance adjustments
Customer Reviews
48 reviews
I just got the Skywatcher 12 Collapsible Dobsonian. Previously, the only telescope I had was an Orion Shorttube 80 that I put on a Camera Tripod. I wanted the largest scope that a single person could move (in 2 pieces) and that would fit in a small sedan (Acura Integra and Honda Civic). I looked at ...
Telescope and reviews seemed to be good. There should be 3 screws connected to the bottom of this mirror. It arrived with 2 screws connected very loosely and 1 not attached and rattling around with the mirror. Mirror came shattered in a million pieces and so did my heart. I will return this and buy ...
Only out twice, but great views of Jupiter, the moon, and Orion nebula. Bulky, but very easy to "move and scan" the sky with (once it's set up) which is what I wanted. I like the freedom to just "explore the sky" free hand, and this gives you both movement and deep sky power. Feels solid and a good ...