Askar 13028HNT-AL Professional Astronomical Telescope F2.8 130mm Aperture Newtonian Reflector for Deep Space

Askar 13028HNT-AL Professional Astronomical Telescope F2.8 130mm Aperture Newtonian Reflector for Deep Space

Description:
- The focusing device of 13028HNT-AL is a large dual speed gear rack focusing device that ensures a focusing stroke of 2cm as much as possible within structural limitations, and supports the replacement of electric focusing. The structure of the focusing device is very stable with a load capacity of 3kg. The back intercept also adopts the standard 55mm (calculated from the M48 threaded end face), making it easy for enthusiasts to get started.
- The dovetail board is of the standard Vixen type, with an extension of 290mm.
- 13028HNT-AL is made of all metal material, with aluminum lens barrel and CNC machined mechanical connection components.
- The corrector in the focuser adopts a doublet lens design, one of which is an ED glass, enhancing the power in aberration correction.

Specification:
- Main lens type: Hyperbolic reflective mirror
- Main lens material: PZ33 (similar to Pyrex glass)
- Corrector: Two-element air-spaced refractive lenses (including one ED glass)
- Aperture size: 130mm
- Focal length: 364mm
- Focal ratio: f/2.8
- Back-focus: 55mm
- Field of view: 6.9 degree
- Image circle: 44mm
- Minor axis of secondary lens: 65mm
- Resolution: 0.89 arc second
- Limiting visual magnitude: 12.3
- Main tube material: Aluminum
- Main lens barrel outer diameter: 174mm
- Main lens barrel length: 400mm
- OTA weight: 3.8kg
- Gross weight (including tube ring and dovetail plate): 4.8kg

Package Included:
- 1 x Telescope