Gear

/// Widefield setup

Askar FRA 500, UNC200

This is my widefield setup for astrophotography. The optics of the setup consists of a Askar FRA 500. This refractor has a diameter of 90 mm and a native focal lenght of 500 mm. I own a the 0.7x reducer aswell. This piece of equipment reduces the Focalratio to F/3.9 and 351 mm focallenght. The telescope is mounted on a Skywatcher HEQ5 pro. For guiding the mount I use PHD2, a William Optics Uniguide 50mm guidescope and a ZWO ASI 220 MM mini camera.

 TELESCOPE

 Model

 Aperture

Askar FRA 500

90 mm

 F-ratio

 Focal lenght

5.6 / 3.9

500 mm / 351 mm

  CAMERA

 Model

 Pixels

 Pixelsize

QHY 268 M

6’224 x 4’168

3.76 μm

 Pixel scale

 

 Field of view

 

1.55 arcs/px @ F/5.6

2.21 arcs/px @ F/3.9

2.69° x 1.80° @ F/5.6

3.82° x 2.56° @ F/3.9

  MOUNT

 Model

 Max. capacity

HEQ5 Pro

10 kg

  FILTER

 Broadband

 Narrowband

Astronomik L-1 & RGB

Astronomik (6 nm)

  ACCESSOIRES

 Guiding scope

 Guiding camera

WO Uniguide 50

ZWO 220 MM mini

Autofocus motor

Optional reducer

ZWO

Askar 0.7x

 Settings for Broadband Subframes

 Imaging Mode

 Gain & Offset

 Exposuretime

HCG

G 0 & O 25

L-1 90s /// RGB 240s

  Settings for Narrowband Subframes

 Imaging Mode

 Gain & Offset

 Exposuretime

HCG

G 56 & O 25

300s

/// Sensor analysis Omegon QHY 268 M

Astrophotography by Sven Arnold

Copyright

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