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Saturn | by seescho
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Saturn

Recorded in May 2013

 

Telescope: Skywatcher MAK 5´´ 1.500mm

Teleconverter: 1,4x + 1,7x

Camera EOS 600D

 

Lossless raw-video

4000 frames

Crop-mode

 

Stacked with autostakkert

Using the best 20% of the frames

 

Wavelet-sharpening with registax

Finetuning with darktable

Text with GIMP

 

Introduction

 

My DSLR shows more functionality using MagicLantern. One of the extended functions is an option to record raw-video. That sounds interesting for my astronomical images. So I decided to compare such a raw-video with a normal full-hd video, recording the planet Saturn. This picture here is the raw-video version.

 

Standard full-hd video

 

My EOS 600D can record full-hd videos. The resolution of these videos is 1920px x 1080px according to the full-hd standard. However, the sensor of the camera has much more pixel. So, it is necessary to shrink the original resolution of the sensor to full-hd. And shrinking means loosing details. Not so good for my astro-pics, if I want to see every single pixel.

 

ML-rawvideo

 

Using raw-video with digital zoom (cropmodus), I can set a sensor section to be recorded. Alle pixels in this section find their way onto the memory-card of the camera, raw without loosing any details. No interpolation, no lossy compression is required. The color depth is 14 bit (versus 8 bit standard full-hd).

 

Question

 

Appart from the color depth, can I see a difference between raw-video and full-hd video?

 

Answer

 

Yes, I can.

 

Comparition

 

In "meinen kleinen Sternenkarten" you can see the other picture, developed from the full-hd video. You can compare both pictures there.

 

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Uploaded on March 5, 2017