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RobboRob / allsky

A Raspberry Pi operated Wireless Allsky Camera
MIT License
26 stars 9 forks source link

Binning limits exposures #5

Open robertpascale opened 4 years ago

robertpascale commented 4 years ago

Binning (mode 2 for 2x2 or mode 4 for 4x4) on the RP HQ Cam will limit exposures taken. Mode 2 (2x2) will limit exposure to 10.22 seconds Mode 4 (4x4) will limit exposure to 6.49 seconds Mode 3 (1x1) will limit exposure to 240 seconds, however, in my testing 240 second exposures actually fail and return a black image. The maximum value that appears to return an image is 200 seconds

It is worth documenting this, as effectively only Mode 3 will be of any use for night time all-sky camera usage.

With a fisheye lens, 200 seconds produces visibile trailing, as does 120 seconds. 60 seconds produces trailing, but it is slight, and probably worth attempting for the sensitivity and additional light gathering capability. 30 seconds produces trailing at the extreme outsides of the image, but otherwise pretty good.

DarKOrange75 commented 4 years ago

Do you think that it is something that could change with updates from Raspberry?

DarKOrange75 commented 4 years ago

These limitations make the binning unusable for us :-(

RobboRob commented 4 years ago

Did you do a rpi-update lately? That solved the issue for me...

DarKOrange75 commented 4 years ago

Yes but did not check if it solved the issue. Will have a look. Thanks.