Sky-Watcher BKP Quattro 250/1000 OTA Optical Tube (SW-1010)

Sky-Watcher BKP Quattro 250/1000 OTA Newtonian Optical Tube (SW-1010)

The Sky-Watcher BKP Quattro 250/1000 is a fast Newtonian optical tube designed primarily for astrophotography while also delivering outstanding visual performance. Featuring a large 254 mm aperture and an ultra-fast f/3.9 focal ratio, this telescope captures significantly more light in shorter exposure times, making it an excellent choice for imaging faint deep-sky objects.

Compared to an f/5 telescope of the same aperture, the Quattro's fast optical system can reduce exposure times by approximately 36%, allowing more efficient imaging sessions. Its relatively compact optical tube and lower weight also make it easier to mount and transport than longer focal length telescopes with similar apertures.

For both astrophotography and visual observation, the use of a dedicated coma corrector is strongly recommended, as coma becomes noticeable in fast Newtonian systems with focal ratios around f/4.

Key features

• 254 mm (10-inch) Newtonian reflector.

• 1000 mm focal length.

• Ultra-fast f/3.9 optical system.

• Designed for advanced astrophotography.

• Precision parabolic primary mirror.

• Compact optical tube.

• Lower weight compared to longer focal length Newtonians.

• 2-inch Crayford focuser with dual-speed microfocus.

• Compatible with both 2-inch and 1.25-inch accessories.

• T2 camera connection for DSLR imaging.

• Vixen-style dovetail rail.

• 9×50 optical finder included.

Fast Newtonian optical system

The telescope uses a precision parabolic primary mirror designed to provide bright, high-contrast images with excellent light-gathering capability.

Its fast focal ratio makes it particularly suitable for imaging and observing:

• Emission nebulae.

• Reflection nebulae.

• Galaxies.

• Star clusters.

• Wide-field deep-sky targets.

The large aperture also delivers excellent performance when observing the Moon and planets.

The 254 mm primary mirror gathers approximately 1,317 times more light than the unaided human eye, allowing observation of celestial objects down to approximately magnitude 14.6 under dark skies.

Its optical resolution enables separation of double stars with angular distances greater than approximately 0.46 arcseconds (Dawes criterion).

Optimized for astrophotography

The Quattro series has been developed with astronomical imaging as its primary application.

The combination of:

• Large aperture.

• Fast f/3.9 focal ratio.

• Compact optical tube.

• Reduced overall weight.

makes it an ideal platform for capturing deep-sky images with shorter exposure times.

To achieve the best image quality across the entire sensor, a dedicated coma corrector is recommended for both visual observing and astrophotography.

Optical tube

This product is supplied as an optical tube assembly (OTA) without a mount.

The compact design allows it to be installed on a wide range of equatorial mounts suitable for astrophotography.

Precision Crayford focuser

The telescope is equipped with a premium 2-inch Crayford focuser featuring dual-speed microfocus adjustment for precise focusing.

The focuser includes:

• 2-inch eyepiece holder.

• 1.25-inch adapter.

• Integrated T2 camera thread for DSLR attachment using the appropriate adapter.

• Smooth, backlash-free operation.

The large focuser accommodates both visual accessories and modern astronomical cameras.

Astronomical observing capabilities

Solar System

The telescope is capable of observing:

• Lunar surface features approximately 1–1.5 km across.

• Sunspots and solar structure (only with an appropriate certified solar filter).

• All planets of the Solar System.

• Phases of Mercury and Venus.

• The disk of Mars.

• Jupiter's cloud belts and Galilean moons.

• Saturn's rings and several of its moons.

• Uranus and Neptune.

• Asteroid motion against background stars.

• Bright comets.

Stars

The telescope allows observation of:

• Nearly 4 million stars down to approximately magnitude 13.7.

• Double and multiple stars separated by more than approximately 0.6 arcseconds.

• The colors of the brightest stars.

Deep-sky objects

The Quattro 250/1000 reveals:

• All Messier catalog objects.

• Hundreds of globular clusters, many partially resolved into individual stars.

• Hundreds of open star clusters.

• Numerous nebulae with fine structural detail.

• Thousands of galaxies, including visible structural features under dark skies.

Terrestrial observation

Newtonian reflectors are not ideally suited for terrestrial use because they produce an inverted image.

When equipped with an erecting lens and mounted on a suitable tripod or mount, the telescope can also be used for basic long-distance terrestrial observation.

Included accessories

• Finder scope bracket.

• Tube rings.

• 9×50 straight-through finder scope.

• Vixen-style dovetail rail.

• 2-inch Crayford focuser with 1.25-inch adapter.

Technical specifications

General

• Catalog number:

  • SW-1010.

• Product series:

  • Sky-Watcher Quattro.

• Optical design:

  • Newtonian reflector.

• Mount:

  • Optical tube only (no mount included).

Optical specifications

• Aperture:

  • 254 mm.

• Focal length:

  • 1000 mm.

• Focal ratio:

  • f/3.9.

• Limiting stellar magnitude:

  • 14.6.

• Maximum useful magnification:

  • 508×.

• Rayleigh resolution:

  • 0.56 arcseconds.

• Dawes resolution:

  • 0.46 arcseconds.

• Light-gathering power:

  • 1,317×.

Optical tube

• Tube weight:

  • 15 kg.

• Tube length:

  • 920 mm.

• Tube diameter:

  • 288 mm.

Focuser

• Type:

  • Crayford.

• Diameter:

  • 2 inches.

• Fine-focus reduction:

  • Yes.

Secondary mirror

• Diameter:

  • 58 mm.

Mounting

• Dovetail standard:

  • Vixen.

Warranty

• Manufacturer's warranty:

  • 60 months.