Imaging Source DMK 21AF04.AS

Camera review for solar system imaging

Page 4 - DMK 21AF04 example captures

Here some practical sample captures with the camera to demonstrate raw frame and final results qualities.

Saturn 2007.03.11

One of my best Saturn captures so far. Seeing was good but not very good. Choosing shorter exposure/integration times to the disadvantage of higher gain settings = more noise helped to freeze the seeing.

Capture settings for the red channel:

Exposure/integration 1/23s
Gain 820 (max. is 1023)
Black level / brightness 0 (slider all left)
Gamma 10 (slider all left)
ROI 400 x 240
Frame rate 15 fps

Best red channel frame - click image for lossless BMP

Processed red channel result with 1500 frames used - click for full details

Processed RRGB result - click image for full details

The raw frames show noticable random noise, no surprise since a very high gain setting has been used for the capture to freeze seeing with short integration times. Stacking 1500 frames eliminates the noise and allows sharpening details without enhancing noise. No sytematic noise patterns are visible even with heavy sharpening pointing out a good signal processing quality of the camera even at high gain settings.

Moon 2007.03.25.

Seeing was slightly above average but not yet in the range I would call good. Again I used more gain to shorten exposure times. Random noise in the raw frames is quite low considering the gain is used at ~60% of the maximum gain. 380 stacked frames have been enough to have an almost noise free result after sharpening.

Exposure/integration 1/30s
Gain 600 (max is 1023)
Black level / brightness 0 (slider all left)
Gamma 10 (slider all left)
ROI Full frame
Frame rate 30 fps

Part of a better raw frame - click image for full lossless BMP

Part of processed result - click for full lunar limb mosaic