Thanks for the reply. I would be very interested to see a bracketing reset feature like you mentioned. Maybe I should learn to program
I understand that continuous mode interval is not consistent, but depending on my shutter speed and interval it seems to be a better option for me than ultra intervalometer. A "normal" shutter speed for a film camera is half the time of the interval between frames. 24fps is the standard film format (each frame is 1/24th of a second long) and the typical shutter speed is 1/48 of a second. When I shoot timelapses with a long interval (e.g. 3-5 seconds) and a short shutter speed (let's say 1/120), motion appears jumpy and there is no motion blur that we're used to seeing in films. My goal when shooting timelapse is to get close to the 180 degree shutter standard that they use in film. I go for longer exposure like 2 seconds for an interval of 4 seconds. This generally requires additional ND filters, but gives a more natural, less strobic feel and doesn't seem to require much if any deflicker in post because your exposures are more of an average of the light in the scene instead of a 1/1000 of a second sample. Anyways, long story short the continuous mode seems to be very consistent when I use longer shutter speeds. I do not experience a slow down when the buffer fills because it seems to have enough time to keep up.
I have decent control over the interval by setting the shutter, though if anyone knows an intervalometer script that can consistently shoot a 1 1/3 second exposure with a 3 second interval on the g12, I'd be very happy with that.
I'm sure nobody's actually read this far into my post, but I'm just excited about the possibilities of CDHK and the idea behind quickly and consistently shooting one long exposure followed by one fast exposure is to expand the dynamic range of these cameras while also maintaining the smooth motion blur that we are used to seeing in most films. The new Red Epic cameras have an HDRx mode that cleverly takes one normal speed exposure (e.g. 1/48 for 24p) and one fast exposure (3-6 stops faster) at the exact same time. Later in post you can combine these into one video with 3-6 stops more dynamic range than the native sensor is capable of. They do this less for extreme tone-mapping and more for a natural blend of the 2 images that preserves the highlights. I doubt it's possible to get 2 different exposures from the same image in a Canon point and shoot (for now), but having a way to shoot one normal exposure and one fast for highlights would be the next best thing to Red's HDRx mode. For timelapse it would basically be as good. Again, sorry for the long post but realizing your $450 Canon camera has more potential for professional use than it has any right to is a pretty exciting thing.
Full on HDR timelapses are really cool and have their place, but when you need a smooth look with a more filmic motion blur you really need an exposure that's around half of your interval time.
What do you think? Have I just not found the right intervalometer script yet?