Thanks,
I have spent a long time with the manual trying to increase the shutter speed and the ISO but the camera still seems to be putting its own limits on and not allowing the CHDK to do its thing :/
If you can describe what specific steps you used, we might be able to help, or determine whether this is a bug in the port. Here are a few things to note:
* CHDK
does not change the options available in the the Canon UI. To override beyond the normal Canon limits, you must use the CHDK override menu or a script.
* The Canon OSD display and EXIF may or may not correctly reflect overrides. To determine whether an override is actually working you should compare actual images with different settings. That is, if you shoot one shot with ISO overridden to 800 and another of the same scene with it at 100, the one at 800 should be much brighter.
* The override settings are described here:
https://chdk.fandom.com/wiki/CHDK_1.5_User_Manual#Enhanced_Photo_OperationsGenerally, if you wanted to do, say 16 s exposure at ISO 800, you would
* Make sure "Disable Overrides" is "No"
* Set "Override TV type to "Ev Step" or "LongExp" (this just changes the CHDK UI to enter the value)
* Set the desired value, and ensure the box next to the value is checked
* Set Override ISO to 800, and ensure the box next to the value is checked
Leave the CHDK menu and shoot normally. With default settings, the override values should be displayed in red in the upper left of the CHDK OSD. If overrides are disabled, you'll see a message reflecting that instead.
By default, overrides are turned off (values kept, but checkbox next to them cleared) each time you restart the camera. You can turn this off by clearing "Disable Overrides on Startup" at the bottom of the "Enhanced Photo Operations" menu.