Can't set shutter speed to Bulb on Sony a6600

[RReverser]

Describe the bug

If current shutter speed is not Bulb already, it's not possible to set the Bulb one via libgphoto2 / gphoto2.

Name the camera

Sony a6600

libgphoto2 and gphoto2 version

2.5.27.1 (master)

To Reproduce

Try gphoto2 --auto-detect --set-config shutterspeed=Bulb on a Sony camera. It will get stuck for a bit, and eventually give up.

Logs

As far as I can tell, this is very similar to the issue I fixed in https://github.com/gphoto/libgphoto2/pull/678, but shutter speed doesn't reuse same functions. Perhaps it should / could? If not, similar fix needs to be implemented in put_Sony_ShutterSpeed too (I can try to do this later, but for me it's a lower priority for now).

[changedsoul]

Same problem on a7RII. Camera gets set to 30" and not bulb. issuing a -B 60 also will not open shutter for 60 seconds. Seems the camera knows its only set for 30" and ignores what its being told.

gphoto2 --auto-detect --set-config shutterspeed=Bulb --debug --debug-logfile=./log.txt log.txt

[msmeissn]

I put in a temporary hack to libgphoto2 master., perhaps you can test

[changedsoul]

Would be glad to. How do I test it out once I clone the git repo?

EDIT: Ok, I think I got it. Compiled and used CAMLIBS to point to where the cam libs are. I ran the command 'gphoto2 --auto-detect --set-config shutterspeed=Bulb' and watched the camera goto 30", then change to Bulb. Looks like the patch worked. Its got got issues with settings for example 3", it will not pick the closest one, but instead picks 15". 3.2" is what it should be, but when I list the speeds the camera supports, It dumps them out in fractions. Perhaps thats why it cannot find a good match?

I have not tested actually snapping a picture yet with it. I just checked if it would change the camera to bulb. Ill do more testing and report back.

[msmeissn]

it should pick the closest one. we have a fixed list inside libgphoto2, as the sony does not expose the property, which we might need to adjust too. debuglogfile there would be helpful. thanks for the feedback that bulb now works :)

[changedsoul]

log.txt So I did some testing and it still seems to have some bugs, but the BULB mode is at least getting set. What I have found is an issue with setting the shutter speed seems strange. For example, My camera has 1", 1.3", 1.6", 2", 2.5", 3.2"..... If I am above 3.2, and issue a command to set 3.2, it will set the camera to 2.5 and not 3.2. This happens with other speeds as well.

When I issue: gphoto2 --get-config=shutterspeed It returns this as my shutter speeds. Not sure if this helps.

Label: Shutter Speed
Readonly: 0 Type: RADIO Current: 1 Choice: 0 30 Choice: 1 25 Choice: 2 20 Choice: 3 15 Choice: 4 13 Choice: 5 10 Choice: 6 8 Choice: 7 6 Choice: 8 5 Choice: 9 4 Choice: 10 32/10 Choice: 11 25/10 Choice: 12 2 Choice: 13 16/10 Choice: 14 13/10 Choice: 15 1 Choice: 16 8/10 Choice: 17 6/10 Choice: 18 5/10 Choice: 19 4/10 Choice: 20 1/3 Choice: 21 1/4 Choice: 22 1/5 Choice: 23 1/6 Choice: 24 1/8 Choice: 25 1/10 Choice: 26 1/13 Choice: 27 1/15 Choice: 28 1/20 Choice: 29 1/25 Choice: 30 1/30 Choice: 31 1/40 Choice: 32 1/50 Choice: 33 1/60 Choice: 34 1/80 Choice: 35 1/100 Choice: 36 1/125 Choice: 37 1/160 Choice: 38 1/200 Choice: 39 1/250 Choice: 40 1/320 Choice: 41 1/400 Choice: 42 1/500 Choice: 43 1/640 Choice: 44 1/800 Choice: 45 1/1000 Choice: 46 1/1250 Choice: 47 1/1600 Choice: 48 1/2000 Choice: 49 1/2 Choice: 50 1/3200 Choice: 51 1/4000 Choice: 52 1/5000 Choice: 53 1/6400 Choice: 54 1/8000 Choice: 55 1/10000 Choice: 56 1/12500 Choice: 57 1/16000 Choice: 58 1/20000 Choice: 59 1/25000 Choice: 60 1/32000 Choice: 61 Bulb END