Thanks once again Alacant! In the Options tab of the DSLR tab of the Ekos Configuration popup there is an option "Force bulb". When I disable that, the camera indeed takes very short exposures. As commented by Jasem, the image info for the CR2 images is wrong but the applied exposure times are correct. And indeed, the FITS headers contain the correct exposure times. Great, one more hurdle taken!
Clear skies, Wouter
Wouter van Reeven
ASI6200MM and 7 slot 2" filter wheel with a SkyWatcher Esprit 80 ED on a SkyWatcher HEQ5-Pro
ASI1600MM-Pro Cooled and 5 slot 1.25" filter wheel with an 8" TS Ritchey-Chrétien on a SkyWatcher EQ6-R
As much as I love INDI KStars, I would not recommend using it for a solar eclipse session. Things happen fast and you can not get the best results with a single exposure time.
Automation is highly recommended and you can't really fix things on the spot. If they aren't working out, stop and watch, you will appreciate watching the spectacle more.
Try eclipse maestro and practice a few simulation sessions. Or get familiar with Magic lantern for a mostly automated process. Good luck!
INDI/KStars on Raspberry Pi 4, 4gb
Raspbian Buster with AstroPi3 script configuration
Skywatcher HEQ5 Pro Mount
Canon 600D Camera
Orion SSAG/ASI120mm @280mm Guide Scope
Waveshare Stepper Motor Board - DIY Focuser
Adafruit GPS Module
Generic Bluetooth Joystick.
Startech 7 port powered USB Hub.
Good question. I suppose you can manually turn off BLOB setting in the camera.
However, this is not necessary. The GPhoto driver checks if the exposure time is < 1 second, and for such exposures, it tries to find if the requested exposure is found within the exposure list (1/400, 1/800..etc) and so it will automatically switch to this exposure when it can. If it can't find any appropriate exposure time, it falls back to BULB.