Astronomy Specialist

SKYWATCHER FLATTENER & REDUCER FOR 72ED

$499.00
SKU: SWA-ED72REDUCER

Sky-Watcher


 

The SkyWatcher field flattener and reducer for the Evostar 72ED transforms your telescope into an astrograph perfect for widefield imaging.

The 0.85x reduction factor will convert the focal ratio of your Evostar 72ED from f/5.8 to f/4.93 with the advantage of shortening the exposure time and extending the field of view. The native 420mm focal length is reduced down to 357mm.

Refractors are affected by field curvature no matter what brand or diameter. This is not an issue for visual observations as eyepieces can partially compensate for these aberrations. On the contrary, when a refractor is used for astrophotography, a curved field will limit the corrected image circle and the stars on the border of the field will appear elongated.

The field flattener and reducer can be screwed directly onto the focuser of the Evostar once the final ring on the focuser tube is removed. On the camera side, the reducer has a M48 male thread that makes this reducer suitable for the majority of camera adapters and T rings.

 

Specifications

 

Reducing factor

0.85 x

Thread on the camera side

Male M48 x 0.75

Thread on telescope side

Female M56 x 1

Working distance

55 mm from the beginning of the M48 thread

SKU

SWA-ED72REDUCER

 


SKYWATCHER FLATTENER & REDUCER FOR 72ED.

SKYWATCHER FLATTENER & REDUCER FOR 72ED

$499.00

Optical design

Image circle

Focal ratio

Aperture

Focal length

Optical thickness

Threads

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

Length

Width

Height

View product