"The Canon S100 will only shoot at 2 pictures per second if you put the camera into "Continuous Mode' using the Canon shooting menu.   But be aware that when you do that, the camera sets exposure and locks focus on the first shot and all subsequent…"

"The link still works.  Or you could start here KAP UAV Exposure Control Script"

"Somebody else caught this too!  
The script's new precision USB pulse width measurements are accurate to 1mSec rather than 10 mSec.   So the timer base was set to 1mSec and that throws off systems expecting 10mSec.
The updated version of the script…"

"Hmmm .. seems to be a limit on depth for replies to replies to replies?
In any case,  3.4 has a couple of bug fixes for video interleave mode, improved logging that doesn't occasionally interfere with saving images by slowing things down, a slightly…"

"Tom :

The latest version of the kap_uav.lua script ( 3.4 ) uses CHDK's new support for high precision PWM timing (CHDK 1.3.0 or newer).   This should help a lot with your issue,  Prior to this, some cameras models showed jitter exceeding 50 mSec.…"

"Sorry - don't know what happened there.   The permanent link (for whatever is the latest version of the script) is :  https://app.box.com/s/a5tbl1xasp8m3a57fclx"

"Hmmm ... appears to be the a wrong or broken link. No idea how that happened.

Try : https://app.box.com/s/a5tbl1xasp8m3a57fclx"

"You updated with a Canon firmware update?  From the official Canon web site?  (Don't forget that CHDK is not "firmware" and makes no permanent changes to the Canon firmware installed in your camera).
As far as the famous E18 Lens Errror,  this is my…"

"I'd be tempted to leave IS (image stabilization) enabled.  The rest of the settings look good."

"It's the link posted in the 6th line of the script ..   or https://app.box.com/files/0/f/0/1/f_11162762030 if you want to go direct."

"And the S100 should focus at infinity in any of the modes (mine does!).    So it might be focus but it might be just low shutter speed.   We also did a lot of work with someone on the CHDK IRC site where the problem came down to vibration isolation…"

"How have you set the "Focus at Infinity?" option?   Note that v3.4 of the script is available and it now automatically selects the best method for "Focus at Infinity" if it's selected.
WWZ"

"The latest version of this script ( 3.4 )  greatly increases the precision of the PWM input to the camera using the new CHDK high precision timer capability.  So if you are having issues with decoding the signal from your Pixhawk,  I would recommend…"