Askar 60F Flat-Field Astrograph
- 60mm Aperture Quadruplet APO Optics
- 408mm Focal Length
- f/6.8 Native Focal Ratio
- 44mm Full-Frame Image Circle
- Integrated Field Flattener
- 2.86kg Gross Weight
The Askar 60F Flat-Field astrograph delivers full-frame imaging capability in a compact package, integrating a 60mm quadruplet APO objective with a 408mm focal length. Its native f/6.8 optical design features a built-in flattener that produces a corrected 44mm image circle, eliminating the need for separate corrective optics and complex back-focus calculations.
The core of the Askar 60F is its quadruplet air-spaced APO objective, which includes one ED glass element to ensure high-contrast images with minimal chromatic aberration. Unlike standard doublets or triplets that require a separate flattener, the 60F's integrated rear element corrects field curvature natively across a full 44mm image circle. This design simplifies your imaging train, allowing you to attach a full-frame camera, focus, and begin capturing sharp, pinpoint stars from edge to edge.
Engineered for portability, the Askar 60F weighs just 2.86kg fully equipped with its included tube rings, handle, and 230mm Vixen dovetail plate. With a contracted length of only 289mm, it fits easily into carry-on luggage and pairs perfectly with lightweight tracking mounts. This makes it an ideal instrument for traveling to dark-sky sites or for quick setup in your backyard.
The Askar 60F arrives ready for astrophotography with a complete set of photographic adapters. The robust focuser provides 50mm of precise travel and terminates in a standard M64x0.75 thread. Included adapters step this down to M54 and M48, allowing direct connection to most dedicated astronomy cameras and DSLRs. The M48 adapter also features an internal thread for mounting standard 2" filters, keeping your imaging train as short and rigid as possible.
When choosing a compact astrograph, a common comparison is the William Optics RedCat 61. The RedCat's f/4.9 Petzval design is significantly faster, allowing for shorter sub-exposure times. However, the Askar 60F offers a distinct advantage with its longer 408mm focal length compared to the RedCat's 300mm, providing more image scale to better resolve details in smaller deep-sky objects or galaxy groups. For imagers seeking a straightforward, flat-field system with greater reach, the Askar 60F is the more targeted choice.
No, the Askar 60F has a built-in field flattener as part of its quadruplet optical design. It is engineered to deliver a flat field across a 44mm image circle, covering full-frame sensors without any additional corrective optics.
The 408mm focal length paired with a full-frame sensor provides a field of view that is ideal for capturing the entire North American Nebula (NGC 7000) and the adjacent Pelican Nebula (IC 5070) in a single, well-composed frame. The 44mm corrected image circle ensures stars will remain sharp across the entire image.
Yes, absolutely. With a fully-equipped weight of just 2.86kg, the Askar 60F is an excellent match for compact GoTo equatorial mounts. This combination creates a powerful and highly portable grab-and-go imaging system capable of capturing high-quality deep-sky images.
The Askar 60F includes a set of adapters, one of which is an M48×0.75 adapter. This is the standard thread for most dedicated astronomy cameras, including those from ZWO. You can typically connect your camera directly to this adapter without needing to purchase anything additional.
Yes. While it is optically optimized for astrophotography, you can use the Askar 60F for visual observation by attaching a standard 1.25" or 2" diagonal and eyepiece. Its 408mm focal length makes it a superb instrument for wide-field sweeping of the Milky Way and observing large open star clusters.
The f/6.8 focal ratio offers an excellent balance between light-gathering speed and optical precision. It is fast enough for deep-sky imaging without being overly demanding on mount tracking accuracy. This moderate ratio also helps ensure excellent color correction and sharp star performance across the entire 44mm image circle.
| Aperture | 60mm |
| Focal Length | 408mm |
| Focal Ratio | f/6.8 |
| Objective Lens | Quadruplet air-spaced APO (with one ED glass) |
| Image Circle | 44mm |
| Focuser Travel | 50mm |
| Total Length (Contracted) | 289mm (with 1.25" adapter) |
| Total Length (Stretched) | 369mm (with photo adapter) |
| Net Weight (OTA only) | 2.36kg |
| Gross Weight (with rings & plate) | 2.86kg |
| Rear-End Adapters | M64×0.75 to M54, M54 to M54, M54 to M48 (with 2" filter thread) |
Download Manual
Askar 60F OTA
× 1
Tube Rings
× 1 Pair
Carry Handle
× 1
230mm Vixen Dovetail Plate
× 1
Photographic Adapter Set
× 1