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CHF 639
Disponible en stock chez le fournisseur
Visit Sky-Watcher Explorer 250PDS is a 254 mm diameter Newton telescope, designed for demanding amateur astronomers who want to explore in detail the most discrete objects in the deep sky, while enjoying excellent performance on the Moon and planets. With a 1200 mm focal length and f/4.7 focal ratio, it offers a perfect balance between brightness, field and precision.
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-type focuser, mounted on ball bearings, guarantees smooth focusing even with heavy accessories such as cameras or wide-field eyepieces. The 1:10 gearing allows micrometric adjustment ideal for high-resolution photography and the 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.
| Features | Value |
|---|---|
| Optical type | Newton reflector |
| Mirror diameter | 254 mm |
| Focal length | 1200 mm |
| F/D ratio | f/4.7 |
| Focuser | Crayford 2″ with 1:10 reduction and 1.25″ adapter |
| Theoretical resolution | 0.45 arcsec |
| Magnitude limit | 13,8 |
| Magnification supplied | ~43x (with 28 mm eyepiece included) |
| Eyepiece included | LET 28 mm 2″ |
| Researcher | 9×50 wide-field optics |
| Tube structure | Solid tube, marked mirror for collimation, fine spider 0.5 mm |
| Pipe weight with clamps | 14.5 kg |
| Mounting | Vixen dovetail with clamps |
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.
Visit 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.
