Advanced bracket and bulb timer result in wrong ev steps in exposure
Created originally on Bitbucket by gerlos (Gerlando Lo Savio)
Trying to use the advanced bracket feature with bulb timer on latest nightly (magiclantern-v2.3.NEXT.2014Jan02.550D109) on a Canon 550D/T2i.
When I use bulb timer to set an exposure longer than 30 s, and I set for example an ev step of 1 eV, I got wrong exposures.
How to reproduce:
- In Advanced bracket I set:
- Bracket type to Exposure (Tv, Ae)
- Frames to 3
- Ev increment to 1 EV
- Sequence to 0 - --
- 2-second delay to Auto
- In Bulb Timer I set:
- Exposure duration to 1m
- Display during exposure to Turn off
Everything else is set to defaults, but LCDSensor Remote which is set to "Wave".
What I expect: first shot should be 60s, second one should be 30s and third one should be 15s.
What I get instead: first shot is 59 s, second one is 22 s and third one is 8 s.
Why I tried to use advanced bracket with bulb timer: I'm doing astrophotography, and need to take several shots with different exposures to cover about 4-5 EV of exposure. If I could combine advanced bracket, bulb timer and intervalometer I could take a complete set of shots automatically.