Astronomy Specialist

ASKAR 0.7x FLATTENER AND REDUCER FOR FRA400 & FRA500

$449.00
SKU: ASA-FRA400-R

Askar

0.39 kg


 

The field flattener & reducer for the ASKAR FRA 400 & FRA 500 is a dedicated corrector with a reducing power of 0.7X. It shortens the focal length from 400mm to 280mm and the focal ratio from f/5.6 to f/3.9 halving the exposure time. The working distance between the flattener and the sensor is 55mm.

The flattener/reducer can be connected to the focuser of the Askar FRA 400 & FRA 500 using the M68 x 1 male thread, on the camera side there is the universal M48 x 0.75 male thread. The flattener has an internal M48 x 0.75 thread to accept any standard 2" filter. 

 

Spot diagram SharpStar 400 + 0.7x dedicated reducer


Specifications

 

Reducing power

0.7 X

Focuser connection

M68 x 1 male

Camera connection

M48 x 0.75 male

Working distance

55 mm 

Length

63 mm

Weight

385 gr

Width

63 mm

Outer diameter

76 mm 

SKU

ASA-FRA400-R


 

Gallery

 

ASKAR 0.7x FLATTENER AND REDUCER for FRA400 & FRA500.

ASKAR 0.7x FLATTENER AND REDUCER FOR FRA400 & FRA500

$449.00

Optical design

Image circle

Focal ratio

Aperture

Focal length

Optical thickness

Threads

M48 x 0.75 Male, M68 x 1 Female

Cooled

Colour or Mono

Pixel size

Sensor dimensions

Resolution

Sensor diagonal

Quantum efficiency

Read noise

Fullwell capacity

Bit depth

FPS

Camera backfocus

Filter size

Filter size

Bandpass (FWHM)

Bandpass (FWHM)

Glass thickness

Mount type

Payload capacity

Latitude range

Dovetail saddle

Slew speed

Encoders

Periodic error correction

Counterweight shaft

Azimuth adjustment range

Internal diameter

Illuminated diameter

Compatible telescope external diameter

Weight

0.39 kg

Length

Width

Height

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