Askar N210 210/756 mm f/3.6 Newtonian astrograph with 0.95× coma corrector (714 mm, f/3.4) (SKU: N210) is a reflecting telescope designed for deep-sky astrophotography. Its 210 mm parabolic primary mirror and lightweight carbon-fibre tube form a fast system with a native focal ratio of f/3.6. The included 0.95× air-spaced triplet coma corrector reduces the focal length to 714 mm, increases the speed to f/3.4, and provides a corrected field intended for APS-C sensors.

Key features

• aperture of 210 mm, 756 mm native focal length, and f/3.6 focal ratio
• included 0.95× coma corrector with an air-spaced triplet design
• focal length of 714 mm and f/3.4 focal ratio when using the corrector
• corrected image field with a 28 mm diameter, suitable for APS-C sensors
• threaded imaging-train connection and 55 mm back focus measured from the M48 thread
• parabolic primary mirror and custom-designed support structure increasing the rigidity and stability of the optical system
• secondary mirror with a 71 mm minor axis, wrapped in black nylon to reduce stray light and improve contrast
• four mounting holes in the secondary mirror holder for installing a dew shield or other accessories
• carbon-fibre tube with a length of 640 mm
• tube rings, multifunctional handle, and 400 mm mounting plate

Included components

• optical tube assembly Askar N210
• pair of tube rings
• dovetail mounting plate, 400 mm
• multifunctional handle
• coma corrector 2" MPCC 0.95×
• adapter M58-to-M48
• set of spacing shims: 2 × 0.1 mm, 2 × 0.2 mm, and 2 × 0.3 mm
• instruction manual

Technical specifications

• brand: Askar
• model: N210
• product code (SKU): N210
• telescope type: Newtonian reflector / astrograph
• aperture diameter: 210 mm
• primary mirror type: parabolic
• native focal length: 756 mm
• native focal ratio: f/3.6
• corrector reduction factor: 0.95×
• corrector design: air-spaced triplet
• corrector diameter: 2"
• focal length with corrector: 714 mm
• focal ratio with corrector: f/3.4
• supported sensor format: APS-C
• corrected image-field diameter: 28 mm
• resolution: 0.55 arcsec
• back focus: 55 mm from the M48 thread
• corrector output thread: M48 × 0.75
• secondary mirror minor axis: 71 mm
• tube material: carbon fibre
• tube outer diameter: 264 mm
• tube length: 640 mm
• optical tube assembly weight: 7.9 kg
• weight with handle, tube rings, mounting plate, and corrector: 9.8 kg
• corrector weight: 0.22 kg

The fast optics, corrected APS-C field, and rigid carbon-fibre tube support an efficient imaging setup for capturing both extended and faint deep-sky objects.