Now, if CHDK has the possibility to actually keep the iris open all the time and only use the electronic shutter to record the frame then I reckon that would completely eliminate variation due to slight differences in the iris opening from frame to frame
A note before the report: the SX40 I am using has a M mode where I choose the speed and aperture and also a manual focus setting which I use in the testing. I think this overrides the script's settings but it still takes exposure and focus measurements when it moves between zoom levels.
Issues I found when testing now the latest version 3: the first frame at a zoom level is still under-exposed compared to the rest at that same zoom level
- when I put the timer at 2 seconds between frames when it moves to the next zoom level and takes measurements the delay becomes 4 or 5 seconds then within the same zoom level it is 2 seconds
take the manual speed and aperture values and focus information from the camera rather than have CHDK calculate it every time and override it (essentially lock exposure and focus prior to shooting).
Massive barrel distortion as if they are RAW images without correction: you can see in the attached photos zoomed in and out how bad it is. So my question is why does it produce it? The in camera software corrects it automatically when shooting outside of CHDK. Is there a way to use the in-camera correction in CHDK? I haven't had the issue running other intervalometer scripts (without the zoom functionality)
I also noted something that i supposed - the optical rate of zoom at the wide end seems faster than at the telephoto.
I was thinking it would be nice to put a zoom end level so it doesn't go to the highest or lowest value necessarily but a user-specified one. And also keep shooting at that level until interrupted.
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