Askar 71F Flat-Field APO

Askar 71F Flat-Field APO - Quadruplet 71 mm Astrographe

Visit Sharpstar / Askar 71F Flat-Field APO is an ultra-versatile astronomical instrument, designed to offer high-level visual and photographic performances in a compact, easy-to-carry tube. Thanks to its advanced optical design, it delivers perfectly corrected fields of view up to full-frame format (full frame) without the need for an external field corrector.

Apochromatic quadruplet optics - flat fields and precise colors

The 71F's lens adopts a quadruplet air-spaced APO design including an ED glass element,
which effectively reduces chromatic aberrations while maintaining high resolution and excellent contrast.
The system produces a 44 mm corrected image circle, which allows direct use of APS-C sensors
and full-format without additional flattener.

• Opening : 71 mm
• Focal length 490 mm
• Focus report : f/6.9
• Objective APO quadruplet with 1 ED element
• Corrected image circle Size : 44 mm

Accessories included - ready to observe and image

The 71F comes with a complete set of accessories, making it easy to unpack and put into operation:

• Askar 71F optical tube with retractable fog shield
• Set of clamps + Vixen 230 mm pommel plate (Vixen/Dovetail)
• 360° rotator on the back of the eyepiece holder
• 2.4″ R&P eyepiece holders double speed with fine adjustment 1:10
• Photographic adapters (4 pieces) for cameras and DSLRs
• 1.25″ 45° rectifier prism for comfortable terrestrial/astronomical observation
• Eyepieces included : 8 mm (60×) and 20 mm (25×)
• Supports for researchers easily accessible

These accessories enable the 71F to be used immediately for visual observation, astrophotography or terrestrial photography.

Mechanical design with use in mind

The 71F's construction emphasizes portability and maneuverability:

• CNC-machined aluminum tube with anti-reflective coating on the inside
• Retractable mist guard to reduce space requirements during transport
• Quick transition from visual to photo mode thanks to the included adapters
• Weight content : ~2.5 kg (net), ~3 kg with clamps and plate
• Rugged 2.4″ focuser supports heavy accessories without bending

The 71F's excellent mechanical ergonomics, combined with its optical quality, make it a relevant choice even for demanding users.

Technical specifications

Why choose Sharpstar / Askar 71F Flat-Field APO?

• Compact, portable format for travel or quick outings
• Field perfectly corrected for full format without additional flattering
• Accessories included for visual observation and astrophotography right out of the box
• Quadruple-lens APO lens for superior image quality
• Robust mechanics and precise focuser for intensive use

Visit Sharpstar / Askar 71F is the ideal solution for enthusiasts who want to exploring the deep sky,
capture large or distant images, or simply enjoy a complete APO telescope that's ready to go.