The Askar 111F 111 mm f/6.9 quadruplet APO optical tube is designed for astronomy enthusiasts and professional astrophotographers who demand flawless optical and mechanical performance. This compact, ultra-portable telescope is an excellent choice for both visual observation and astrophotography.
With an aperture of 111 mm and a focal length of 766 mm, the Askar 111F optical tube has a focal ratio of f/6.9. The colour-corrected ED triplet objective and integrated field flattener ensure distortion-free, precise sharpness across the entire field of view. The telescope provides a 44 mm image circle, making it ideally suited for imaging with full-frame sensors. Like Petzval designs, the system does not require backfocus calculations. With the optional 0.74x focal reducer, it becomes an extremely fast f/5 astrograph.
The dual-speed, 3" rack-and-pinion focuser enables precise adjustment and can be rotated through 360°. The M64, M54 and M48 threaded connections on the focuser ensure broad compatibility with a range of accessories and cameras.
Thanks to its practical tube rings, Vixen dovetail bar and carrying handle, the Askar 111F can be easily mounted and transported. The telescope also features two finder shoes for attaching additional accessories. The retractable dew shield helps protect the lenses from moisture and dew.
The Askar 111F optical tube alone weighs 5.74 kg and measures 664 mm in length, making it a portable and ideal choice for trips or locations where easy transport is essential. The Askar 111F quadruplet APO optical tube delivers outstanding performance in high-quality optical solutions and is an excellent companion for astronomical adventures.
Key features of the Askar 111F apochromat:
- Aperture: 111 mm
- Focal length: 766 mm
- Focal ratio: f/6.9
- Colour-corrected ED triplet objective and field flattener lens
- 44 mm image circle, full-frame compatible
- 3" dual-speed, 360° rotatable focuser
- Camera connections: M64, M54 and M48
- Tube rings, dovetail bar, carrying handle
- Two finder shoes on the optical tube
- Retractable dew shield
- Weight: 6.76 kg (with tube rings and dovetail bar)
- Length: 664 mm
- Portable travel telescope for visual and photographic use
