More products from the brand :Sharpstar

Newton Askar 150mm HNT-AL f/2.8 astrograph

Name: Astrographe Newton Askar 150mm HNT-AL f/2.8 - Deep space astronomy
SKU: SCOPE-0003
Price: 1639 CHF
Availability: InStock

Don't miss this exceptional promotion on this wide-field Astrograph

Original price was: CHF 1'799.Current price is: CHF 1'639.

Reference SCOPE-0003

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Sharpstar 15028HNT-AL - the f/2.8 hyperbolic astrograph that brings out the light

Designed for high-resolution imaging, the 15028HNT-AL concentrates a 150 mm hyperbolic primary mirror and a triplet corrector integrated into a compact aluminum tube. At f/2.8, it captures as many photons in half the time than an f/4 tube - enough to multiply wide-field projects with complete peace of mind.

For example:

Ultra-fast & full-format optics

Hyperbolic primary mirror in PZ33 (Pyrex-like) Ø150 mm, reflectivity ≈ 97 % (multi-layer dielectric coating).
Focal length 420 mm (f/2.8)a field wide angle of 6°, easily illuminating an image circle of 44 mm (full format).
Corrector triplet air-spaced (including 1 ED lens) housed in the eyepiece holder: fine stars and coma eliminated right down to the corners.
Secondary Ø70 mm (minor axis) for even illumination on 24×36 sensors.

Robust & precise mechanics

Tube and CNC parts in all-aluminumreinforced rings with oversized butterfly screws.
Lens holder rack-&-pinion 2″ dual-speed (20 mm stroke) + (20 mm stroke) + (20 mm stroke) + (20 mm stroke) 360° rotator integrated, 3 kg capacity.
Easy collimation : 3×3 primary adjusting screws + one-piece CNC secondary spider for sharp egrets.
Losmandy 200 mm base plate and 200 mm handle included; side-mounted finder base for accessories.

Nomadic but powerful

Length : 443mm - Ø : 193 mm - OTA weight : 4.8 kg (6 kg with rings & dovetail).
Back-focus 55 mm (from M48 thread): compatible with SLR, hybrid and astro cameras.
Visual magnitude limit 12.7 - Theoretical resolution 0.77″.

Key specifications

Parameter	Value
Opening	150 mm
Focal length / F-ratio	420 mm - f/2.8
Design	Newtonian hyperbolic + triplet corrector (1 ED)
Image circle	44 mm (full format)
Effective field	6 °
Secondary (minor axis)	70 mm
Tube (L × Ø)	443 mm × 193 mm
Mass OTA	4.8 kg (6 kg overall)
Lens holder	Rack-&-pinion 2″ dual-speed + 360° rotator
Back-focus	55 mm (from M48×0.75)
Resolution / Mag. limit	0.77″ - 12.7 mag

With the Sharpstar 15028HNT-ALGo light speed: immortalize diffuse nebulae, isolated galaxies or complex stellar fields in record time.

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