PrimaLuceLab SESTO SENSO 3 Robotic Focus Motor
Optional motor for the dual-speed Crayford eyepiece holder. Check the actual model, axis, socket, clearance, and 12-volt power supply before installation.
CHF 234.00
CHF 639.00incl. Swiss VAT
Will be ordered for you
Timeframe: 10 days to 3 weeks
Estimated shipping: Between November 22 and 27, 2026
The Sky-Watcher Explorer 250PDS is a 254-mm-diameter Newtonian telescope designed for discerning amateur astronomers who want to explore the faintest deep-sky objects in detail while enjoying excellent performance when observing the Moon and the planets. With a focal length of 1,200 mm and a focal ratio of f/4.7, it offers a perfect balance between light-gathering power, field of view, and sharpness.
With an aperture of 25.4 cm, this telescope captures more than 1270 times more light than the human eye, revealing faint galaxies, subtle nebulae and distant clusters with astonishing clarity. The diffraction-limited parabolic mirror maintains remarkable sharpness even at high magnification, while offering optimal contrast on the lunar surface or Jupiter's cloud bands.
The 2″ Crayford-style focuser, mounted on ball bearings, ensures smooth focusing even with heavy accessories such as cameras or wide-field eyepieces. The 1:10 gear ratio allows for micrometric adjustment, ideal for high-resolution photography and achieving perfect focus on diffuse objects.
With its f/4.7 ratio, the Explorer 250PDS is a fast instrumentideal for reducing exposure times in astrophotography. Mounted on an EQ6-R, AZ-EQ6 or equivalent, it becomes a formidable machine for capturing planetary nebulae, spiral galaxies or large Hα complexes.
This tube is supplied without frame. For visual use, a EQ5 or HEQ5 is a minimum. For photography, we recommend a EQ6-R or AZ-EQ6. You can also add high-magnification eyepieces, a 2x Barlow lens or a lunar filter for greater comfort during lunar observation.
The Sky-Watcher 250PDS is an excellent gateway to advanced astronomy. Bright, fast, versatile and precise, it's a wise choice for passionate visual astronomers as well as for those who want to get serious about deep-sky astrophotography.
With an open aperture of 254 mm at f/4.7 and a focal length of 1,200 mm, it is primarily an astrophotography instrument: when used with a camera, it is designed to photograph nebulae, galaxies, and clusters, offering a good balance between field of view and detail.
Included eyepiece: 28 mm. With a focal length of 1,200 mm, it provides 43× magnification. To calculate the magnification of an eyepiece, divide the telescope's focal length by the eyepiece's focal length.
It can still be transported by car: the tube weighs about 14.4 kg.
Yes, and with care: in astrophotography, an open-aperture Newtonian telescope at f/4.7 requires precise collimation. A collimation laser simplifies the adjustment. The Sky-Watcher Collimation Guide (EN) explains the procedure.
Yes, that's what it's designed for: it mounts on a motorized equatorial mount (not included) with an astro camera or a regular camera. At f/4.7 and a focal length of 1,200 mm, it requires precise tracking: be sure to use autoguiding for long exposures. With a tube weighing approximately 14.4 kg (without accessories), choose a mount with a load capacity that leaves some margin.
250 mm Newtonian telescope, 9×50 finder scope, 2″ eyepiece holder with 10:1 reduction ratio and 1.25″ adapter, 28 mm LET 2″ eyepiece.
Here are a few accessories we've selected for this model, depending on your needs.
Optional motor for the dual-speed Crayford eyepiece holder. Check the actual model, axis, socket, clearance, and 12-volt power supply before installation.
Recommended diameter: 350 mm. Check the measurement and the mounting.
