Askar 107PHQ F/7 Quadruplet Flat Field

The Askar 107PHQ is a professional apochromatic flatfield Petzval quadruplet with a focal ratio of f/7 and a corrected field of 44mm in diameter.
The Askar 107PHQ includes two Extra Low Dispersion glass elements for superb correction of chromatic aberration.

Differently from standard ED refractors, the Askar 107PHQ 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 44mm fully corrected image circle and a focal ratio of f/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 of 95mm allows use as a visual instrument as well as a capable astrograph.

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 107PHQ comes with a variety of adapters to connect a wide range of imaging and visual accessories.