The Sky-Watcher Classic 250P (10-inch Dobsonian) optical tube weighs 30 lb; the Vixen-class dovetail head (CG-5 / EQ5 class) is rated for 22 lb. Whether the tube fits the mount payload, and the margin once you add a diagonal and eyepiece.

Updated 05 September 2026.

Eyepiece and telescope pairing

Will the Sky-Watcher Classic 250P (10-inch Dobsonian) fit on the Vixen-class dovetail head (CG-5 / EQ5 class)?

Whether the Vixen-class dovetail head (CG-5 / EQ5 class) can carry the Sky-Watcher Classic 250P (10-inch Dobsonian) tube steadily, from the published tube weight and mount payload.

Optical tube weight
30 lb
Mount rated payload
22 lb (the EQ5 / CG-5 class German equatorial, a common home for a 150 mm to 203 mm SCT tube)
Tube as share of payload
136%
Dovetail
Vixen-style, matching this mount head
No fit

Over payload. The Sky-Watcher Classic 250P (10-inch Dobsonian) tube weighs 30 lb, more than the Vixen-class dovetail head (CG-5 / EQ5 class) rated payload of 22 lb, so the mount is overloaded and views will shake. Choose a heavier mount.

A mount's rated payload is for the whole instrument, not just the bare tube. The Sky-Watcher Classic 250P (10-inch Dobsonian) tube is 30 lb, which is 136% of the Vixen-class dovetail head (CG-5 / EQ5 class) 22 lb rating before you add a star diagonal, finder and eyepiece.

For steady high-magnification views many observers keep the real load below about 70% of the rated payload, because damping time grows quickly as a mount nears its limit. The eq5 / cg-5 class german equatorial, a common home for a 150 mm to 203 mm sct tube.

The mount to buy

Shop Vixen-class dovetail head (CG-5 / EQ5 class) on AmazonaffiliateFind Vixen-class dovetail head (CG-5 / EQ5 class) on eBayaffiliate

Related

Sky-Watcher Classic 250P (10-inch Dobsonian)254 mm f/4.7
Sky-Watcher Classic 250P (10-inch Dobsonian) to camera adapterprime-focus thread
Best eyepiece for the Sky-Watcher Classic 250P (10-inch Dobsonian)exit-pupil match

Questions and answers

Will the Sky-Watcher Classic 250P (10-inch Dobsonian) fit on the Vixen-class dovetail head (CG-5 / EQ5 class)?

Over payload. The Sky-Watcher Classic 250P (10-inch Dobsonian) tube weighs 30 lb, more than the Vixen-class dovetail head (CG-5 / EQ5 class) rated payload of 22 lb, so the mount is overloaded and views will shake. Choose a heavier mount.