Sharpstar 150 F/2.8 HNT hyperbolic astrograph with 3-lenses corrector

Sharpstar 150 F/2.8 HNT hyperbolic astrograph with 3-lenses corrector

Sharpstar presents a new compact astrograph called 150 F2.8 HNT, a mirror astrograph composed by a primary hyperbolical mirror F/2.8, a standard secondary mirror and a three lens corrector capable to cover a 44 mm imaging circle, i.e. up to the full-frame image format (24x36 mm).This new astrographs features a 150 mm primary mirror with an effective focal length of 420 mm. A fantastic instrument for wide-field imaging!

Features

• Optical design: reflector with hyperbolic primary mirror and 3-lens corrector at the focal plane
• Primary mirror: 150 mm
• Secondary mirror: 70 mm
• Mirror substrate: low expansion H-PZ33 borosilicate (like Pyrex) with high-refelctivity Enhanced-aluminiun coating (96%)
• Linear obstruction: ~ 46,7% (21,8% area)
• Focal length: 420 mm
• Focal ratio: F/2.8
• OTA length: 450 mm
• Diametro esterno tubo ottico: 195 mm
• Backfocus: 55 mm from the M48x0.75 threaded adapter (fits M48 rings).
• OTA build with carbon and light aluminium alloys CNC machined
• 2.5" R&P focuser with micro-pinion assembly, integrated optical corrector (removable) and 1.25" adapter (removable).
• Comes with both Losmandy and Vixen dovetail plates, hard transport case, universal finder base, CNC rings and handle.
• Weight: around 4.5 Kg OTA only, 6 Kg complete with rings, dovetail and handle

Following some sample image taken with Sharpstar 150 F/2.8 HNT: