Skywatcher N 250/1000 Quattro-10S Steel OTA

Description

Resolve faint galactic details and capture wide-field emission nebulae with the Skywatcher N 250/1000 Quattro-10S Steel OTA large-aperture parabolic imaging astrograph telescope. Designed with a fast f/4.0 focal ratio, this 250mm (9.84 in) aperture instrument features a 1000mm focal length, delivering 0.46 arcseconds Dawes resolving power and reaching magnitude 14.7 for high-resolution deep-space astrophotography.

The Skywatcher N 250/1000 Quattro-10S Steel OTA utilizes a precision parabolic primary mirror made from low-expansion borosilicate glass with 94% reflective dielectric enhanced aluminum coatings. Its 980mm rolled steel cylinder features an oversized 82mm secondary mirror (32.8% obstruction by diameter) and a 2-inch Linear Power Track Crayford focuser with 1:10 micro-reduction and a 360-degree field rotator. Supported by a 75mm Losmandy dovetail, the 14.80 kg (32.63 lbs) OTA prevents sensor tilt during long exposures.

Key Features of Skywatcher N 250/1000 Quattro-10S Steel OTA

Engineered for large-aperture high-speed deep-sky astrophotography, this 10-inch Sky-Watcher Quattro astrograph pairs an f/4.0 parabolic mirror with a 2-inch Linear Power focuser. Its oversized 82mm secondary mirror and Losmandy mounting bar ensure full-frame sensor illumination and rock-solid platform stability.

• 250mm (9.84 in) clear aperture with 1000mm focal length and fast f/4.0 optical speed
• Precision parabolic primary mirror made from low-expansion borosilicate glass
• Dielectric enhanced aluminum coatings achieving 94% reflectivity with silicon dioxide overcoat
• Oversized 82mm secondary mirror obstruction (32.8% diameter, 10.8% area) for full illumination
• 2-inch dual-speed Linear Power Track Crayford focuser with 1:10 micro-drive and 360° rotation
• Standard 55mm backfocus clearance from optional M48 coma corrector
• Losmandy-style 75mm dovetail bar with heavy cast-aluminum tube mounting rings
• 9×50 straight-through finderscope and 2-inch to 1.25-inch reduction adapter included

Fast f/4.0 Parabolic Optics & 82mm Secondary Mirror

The 250mm parabolic primary mirror gathers massive light volume across an f/4.0 focal layout, cutting sub-exposure times on faint galaxy arms and nebular structures. With an oversized 82mm secondary mirror that illuminates full-frame sensors when paired with a coma corrector, this Sky-Watcher astrograph supports magnifications from 35.7x up to 500x.

2-Inch Linear Power Track Focuser & Losmandy Mounting

Carrying heavy cooled CCD cameras and filter wheels requires an unyielding focuser platform. The Quattro-10S features a 2-inch Linear Power Track focuser with a 1:10 micro-reduction drive that eliminates drawtube flexure. Supported by heavy cast-aluminum rings and a 75mm Losmandy dovetail plate, it ensures rigid mount attachment on observatory pier setups.

• 2-inch dual-speed Linear Power Track Crayford focuser with 1:10 precision micro-drive
• Built-in 360-degree field rotator for effortless astrophotography framing composition
• Heavy-duty 75mm Losmandy-style dovetail bar for maximum equatorial mount stability

Sky-Watcher Quattro Series Warranty

The Skywatcher N 250/1000 Quattro-10S Steel OTA is backed by a 2-year limited warranty against material and manufacturing defects. The complete factory package contains the 250/1000 Quattro optical tube assembly, heavy cast-aluminum tube rings, Losmandy dovetail bar, 9×50 straight-through finderscope, and a 2-inch to 1.25-inch reduction adapter.