Shutter speed stuck during autoramp [fixed in FW A2.1.3 and A2.1.4]

[Moga]

I've recently picked up the Unleashed to do 24h holy grail timelapses, but in my testing it has failed to adjust the shutter speed properly during a night to day transition. The exposure time will stick to 4 seconds despite the image gradually being overexposed and completely washed out. During this time, the ISO and aperture will adjust to their limits.

I have been able to recreate the bug by purposefully over or underexposing the start of an autoramp sequence. The Unleashed will attempt to correct the exposure with anything from the 1/8000-3s range. Once it is set to 4 seconds or higher, it will fail to adjust the exposure time. Tests were conducted with and without ND filters. This issue has manifested on two cameras, both Canon 5dM4.

Settings:
EV Smoothing 24h
Interval: 1min
Day: Default
Night: Default

FW: A2.0.1 B2.0.0 C2.0.0

[Oliver]

Sorry for the trouble 😕
Which algorithm were you using?

[Moga]

EV Smoothing 24h.

I've also tried testing the EV Smoothing + Autocomp algorithm, but that one fails to adjust at all and gives the error message "Trigger is available. Ramping operation failed too many times. Check you camera settings."

[Moga]

Any updates on this issue? Should the unit I have be RMA'd?
Hoping to use the Unleashed on a project next year, but it will not work with this issue.

[Oliver]

Hi,
we implemented a possible fix, and are working on getting it released with the apps as soon as possible. It was planned for this week, but I'm not 100% sure if we'll still manage by tomorrow.

[Moga]

Understood, thank you.

[Moga]

Tested the new firmware yesterday and today; the behavior has changed a little, but unfortunately the issue still persists. Now the shutter speed will adjust normally at first, gets stuck until the EV is about +3, then immediately drops to 0EV and adjusts normally after that. So far in my tests I found the Unleashed to hang on 15" and 4" shutter speeds.

Still using the EV 24h algorithm. No issues for day-to-night transitions.

IMG_3093.jpg (36.53 KiB) Viewed 10933 times

[Moga]

Any updates to this issue?

[Oliver]

Hi,

We've had one or two similar reports from other customers, but have not been able to reproduce it yet. But obviously there's something wrong, so we'll keep trying!

[zoom]

Oliver,

Has this issue being addressed yet?

Apparently I cannot use the modified LRT + beta algorithm due to the serious degrade since v2.0.0 as I reported in another thread.

Which algorithm is reliable for sunrise/sunset auto ramping right now? This EV smoothing 24h or the standard LRT? If we still don't have a affirmative fix for this EV Smooth issue, I guess the only leftover is the standard LRT algorithm?

I really cannot afford the try and error solution for my next vacation.