Askar 60F Quadruplet Flat-Field APO Refractor - 60F
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Askar 60F Flat Field Quad Refractor
- 60mm aperture
- 408mm focal length
- f/6.8 focal ratio
- Quadruplet APO design
- 1 ED glass element
- Supporting full frame (44 mm image circle)
- No need to calculate the back focus
- Built-in Flattener
- Retractable lens hood
- 360° rotator
- 2 Finder bases
- 2.4 inch R&P focuser
- 1:10 fine adjustment
- 1.25/2'' visual adapter
- 230mm Vixen dovetail plate
- 4-piece photographic adapter set
The Askar 60F is a self-flattened design that allows users to avoid calculating the back focus and buying additional flattener, after attaching the imaging accessories, users can use it for imaging after the OTA is in focus.
With practicality and versatility in mind, the Askar 60F's weight and size are effectively controlled, making it easy to carry and use. The Askar 60F OTA weighs only 2.5kg and the gross weight is 3kg (including the tube rings and dovetail plate).
The Askar 60F is versatile in its use, allowing for both visual observation and astrophotography. Just add a diagonal & eyepiece for visual use or your favorite DSLR or astro imaging camera & adapter for terrestrial imaging or astrophotography.
The mechanical design of the Askar 60F itself adheres to Askar's consistent philosophy of taking into account the user's habits and minimizing the user's invisible costs.
The dew shield of the Askar 60F is a retractable design, further shortening the overall length and increasing portability. The entire lens tube of Askar 60F is crafted using high-quality CNC machining. The dew shield' interior is covered with matte paint to effectively reduce stray light reflections.
A finder base is included on the handle at the top of the tube rings, and there are two additional finder bases on both sides of the focuser, which not only eliminates the need for disassembling when changing the position of the finder scope but also provides additional mounting positions for other astronomical accessories.
In terms of the focuser, the Askar 60F is equipped with a dual-speed R&P 2.4-inch rigid focuser with 1:10 fine adjustment and a 360° scale field rotator at the rear end for precise angle adjustment.
The Askar 60F's dovetail plate is a 230mm standard Vixen dovetail plate, which slotted 1/4 screw holes as well as 3/8 screw holes for direct tripod attachment.
Specifications
| Parameters | ||
| Aperture size | 60mm | |
| Focal length | 408mm | |
| Focal ratio | f/6.8 | |
| Objective lens | Quadruplet air-spaced APO(including one ED glass) | |
| Image circle | 44mm | |
| Maximum accessory connection (with the focuser fully retreated) | Imaging mode: 81mm (from the base of M48×0.75 male thread） 99mm（from the base of M54×0.75 male thread) |
Observing mode: 120mm（from the end of 1.25" eyepiece holder） 130mm（from the end of 2" eyepiece holder） |
| Total length | 289mm(including 1.25" adapter as dew shield contracted） 323mm(including 1.25" adapter as dew shield fully stretched） 336mm(including the photographic adapter as dew shield contracted） 369mm(including the photographic adapter as dew shield fully stretched） |
|
| Net weight | 2.36kg | |
| Gross weight (Including tube ring&dovetail plate) | 2.86kg | |
| Rear-end thread type | M64×0.75-M54×0.75 M54×0.75-M54×0.75 M54×0.75-M48×0.75 (with M48×0.75 filter thread) |
|
| Standard package items | A 60F OTA，a pair of tube rings, a handle, a mm Vixen dovetail plate,a set of photographic adapters | |