ASKAR 130PHQ APO QUADRUPLET f/7.7
Askar
Apochromatic Petzval quadruplet
12.5 kg
ASKAR 130PHQ APO QUADRUPLET f/7.7 is backordered and will ship as soon as it is back in stock.
The Askar 130PHQ is a professional apochromatic flatfield Petzval quadruplet with a focal ratio of f/7.7 and a corrected field of 60mm in diameter, making it suitable for use with medium-format cameras.
The Askar 130PHQ includes two Extra Low Dispersion glass elements for superb correction of chromatic aberration.
Differently from standard ED refractors, the Askar 130PHQ features a Petzval design that does not require to set the sensor to a specific distance to the last lens. That leaves the freedom to use any filter wheel, any off-axis guider or accessory without any worry to calculate the correct distance from the flattener.
With a large 60mm image circle and a focal ratio of f/7.7, this is the perfect astrograph for the advanced astrophotographer. The large rack and pinion 3.4" focuser has a massive 8kg payload capacity, can be rotated 360° to perfectly frame the subject and it has a reduction gear of 10:1 for precise focusing. Its long travel distance allows use as a visual instrument as well as a capable astrograph. The 130PHQ is natively compatible with the Prima Luce Lab Sesto Senso 2 robotic microfocuser.
All the lenses are fully multi-coated and the tube is internally flocked to reduce reflections and absorb stray light. The tube is made of CNC-machined aluminium, the rack and pinion focusing mechanism of brass and the mechanical components are engineered to provide the best rigidity, performance and durability.
The Askar 130PHQ comes with a variety of adapters to connect a wide range of imaging and visual accessories.
Specifications
| Optical design | Apochromatic Quadruplet air-spaced |
|---|---|
| Objective diameter | 130 mm |
| Focal length | 1000 mm |
| Focal ratio | f/7.7 |
| Resolving power | 1.06 arc seconds |
| Stellar limiting magnitude | 13.27 |
| Max. magnification | 325 x |
| Light gathering power | 344.9 times the human eye |
| Mount attachment | Losmandy style dovetail plate (300 mm long) |
| Focuser | Rack & pinion dual speed (10:1) 3.4" diameter |
| Included connection adapters | M86 x 1, M68 x 1, M54 x 0.75, M48 x 0.75, 2", 1.25" |
| Backfocus | 186 mm (from the base of the M86 thread) |
| Tube weight | 12.5 kg (including tube rings and dovetail bar) |
| Tube diameter | 146 mm |
| Dew shield diameter | 162 mm |
| SKU | AS-130PHQ |
Included items
- Askar 130PHQ
- Pair of tube rings
- 300mm Losmandy style dovetail bar
- Carrying handle
- Adapter M86 x 1 to M68 x 1
- Adapter M68 x 1 to M54 x 0.75
- Adapter M54 x 0.75 to M54 x 0.75
- Adapter M54 x 0.75 to M48 x 0.75 with 2" filter thread
- 2" visual back
- 1.25" adapter
- Manual
