I was once again playing with Ekos and noticed the capture is only working if the exposure time is longer than 1.8". Anything shorter than that will yield the same error I described on the original post.

Even with "force bulb" disabled, it seems as if it's always trying to do bulb. I'm not sure.

Another thing I noticed, is that if I set a 3" long exposure on Ekos, it works, but the .CR2 file metadata will display the exposure time as 1.0", not 3.0".

As stated before, I'm using a Mirror Lock. But I noticed something strange: When I set a 3" long exposure, I hear 4 clicks. The first and the last are loud. But the two of the middle are quiet.
So I think the first and the last are the mirror moving up and down, and the other two are the opening and closing of the sensor to perform the exposure itself. But I see that the exposure countdown starts on the first click, not on the second one. So I think that kinda explains why I have a 1.0" exposure metadata when I ask for a 3.0" one. 2" were spent on the mirror lock delay. (2" is my mirror lock delay)

Not good.

So I tried disabling the mirror lock, both on Ekos and both on the camera settings. On Ekos I haven't found a "disable mirror lock" specific config., so I've set the Mirror Lock to 0". But after doing this I'm no longer able to take any pictures, not even the long exposures. The camera remains completely silent when the Ekos log displays attempts to capture the image. In other words I can only take pictures when I have Mirror Lock enabled.

But even so, not short exposures as I said. And even the longer ones seems a little bit messed. Like 3" exposing only 1" on reality.

Also, I don't think that calculating Mirror Lock delay + exposure time works. Using a 2" mirror lock and commanding Ekos to expose 3" and later 2.8" will both yield a .CR2 file with a 1.0" exposure on the metadata. (I was expecting to get one as a 0.8" exposure)

All of this made me wonder if there's someone reliably using INDI+Ekos to work with DSLR cameras. Because I don't feel it's production ready at all to be honest. (I'm eager to help)

Is there anyway to take short exposures (like 0.8") on Canon DSLRs?

Thank you!

I have 600D and just used it to take all kind of different exposures.. this is my development camera so I know that ALL the features work quite well. Maybe this is somehow related to Manjero? Not sure why, but if you use it with another distribution (raspbian or ubuntu).. same issue? Mabye the libgphoto2 is not the same.