Astrophotography Emission Nebula Reflection Nebula

Astrophoto: NGC 6914 – 07/21

The available data are not the best. Nevertheless, the step to use a flattener was very important for me.

The picture of the reflection nebula NGC 6914 (blue) was the first attempt with my newly attached flattener without any further optimization.

NGC 6914

The primary target of my astrophoto evening (NGC 6914) is, for a 600mm telescope with an APS-C chip, a bit small. But i like the contrast of the blue reflection nebula and the red emission nebulae. Here the high resolution Astrophoto on Flickr:

NGC 6914

Workflow 2024

Here my attempt to make a better picture with my new workflow. In my opinion it is not better in every aspect.

Lessons Learned


In the upper left part of the picture is a lightreflection i never had before. Possibly the caused of a nearby lamp. I ll have to see, if this is a one time-effect or if this is caused by the combination of the lamp and my new flattener.


This picture is the 1st one i shoot with a flattener in my refractor, the TSFlat2. The stars are round! Even in the corners.

Exposure time

The total exposure time of only about 120 minutes is really a bit too short. It would be good for the image if i could double the exposure time. But taking the weather sitution into count, i can be very pleased with the result.

Technical overview

TelescopeVIXEN ED80sf
Focal Length600mm
Aperture ratio7.5
Erecting LenseTSFlat2
MountSkywatcher HEQ-5
Mount ControlINDI
Guiding Scope Focal Length162 mm
Guiding Camera Chip4.8mm x 3.6mm, 8bit
Guiding Camera Resolution1280×960
Guiding SoftwareEKOS, INDI
Dithering3 pixel
CameraCANON EOS M100(a)
Methodfocal projection
Camera angle
Camera ControlEKOS, INDI, Gphoto2
Photography Date07/18/2021
Exposure-Time Lights37x180s
SensitivityISO 800
CalibrationframesFlats, Bias
Post Processing Date07/19/2021
Reprocessing Date01/06/2024
Stacking, IntegrationAffinity Photo
Post Processing SoftwareAffinity Photo
Image EditingAffinity Photo
Reprocessing SoftwarePixInsight
Capture PlaceKoblenz, Germany
LightpollutionBortle 5
Scattered lightstrong

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