OTA · MSRP $1,499
Askar 111F Flat-Field
Key specifications
| Aperture | 111 mm |
|---|---|
| Focal length | 766 mm |
| Focal ratio | f/6.9 |
| Optical design | Quadruplet APO |
| Weight | 5.74 kg |
All specifications
| Focuser type | 3-inch rack and pinion, 1:10 fine focus, 30 mm travel, 360-degree rotator |
|---|---|
| Tube length | 664 mm |
| Dovetail | Vixen |
About
A 111 mm f/6.9 quadruplet air-spaced APO astrograph — three elements in front, one at the rear, one of them ED — that is self-flattening, so no separate flattener or back-focus calculation is needed for its 44 mm full-frame circle. It has a 3-inch dual-speed rack-and-pinion focuser with a 360-degree graduated rotator, two finder bases and a stepped photographic adapter set.