Hello,
I was experimenting with intervalometer using my 650D and found out that if I set delay between shots to low values, i.e. 3 or 2 or 1 seconds I experience that sometimes delays between shots are not consistent.
For example, when set to 3 seconds it goes like: shot - 3 seconds - shot - 3 seconds - shot 3 seconds - shot - 5 seconds - shot - shot.
I have no additional modules loaded (unloaded them as I suspected that it might be somehow connected to amount of RAM consumed by modules).
Card is Transcend 128 GB SDXC UHS-I Ultimate TS128GSDXC10U1 - I've tested it with ML's benchmark it shows consistent 40Mb/sec speed for write and read (it is maximum speed my camera supports, as far as I know). Same situation happens with SanDisk 16Gb Extreme Pro card.
Could it be something I overlooked, which must be done to use short times between shots, as I'm trying to make timelapse videos and 4-5 seconds I can safely use now gives very fast timelapse when converted to video at 25 fps - I could lower rate to, i.e. 12 fps, but it will then look not the way it should be...
Thanks in advance!
May I ask if you used advanced bracketing together with intervalometer?
Quote from: Walter Schulz on July 20, 2014, 12:57:28 PM
May I ask if you used advanced bracketing together with intervalometer?
No, every other setting is default...
Thanks, will try to reproduce. Which build you're using?
EDIT: A very short test showed no problem. Doesn't mean that much, of course.
Do you have checked your noise reduction settings? Access Canon menu's shooting tab 3 and look for the last two items. Are both off?
Quote from: Walter Schulz on July 20, 2014, 01:39:35 PM
Thanks, will try to reproduce. Which build you're using?
Nightly.2014.Jul03.650D104
Quote from: Walter Schulz on July 20, 2014, 01:39:35 PM
EDIT: A very short test showed no problem. Doesn't mean that much, of course.
Do you have checked your noise reduction settings? Access Canon menu's shooting tab 3 and look for the last two items. Are both off?
Long exp. noise reduction OFF
High ISO speed NR set to "two sticks", but I'm shooting in RAW and it says that it is not used when shooting in RAW. Anyway, I will try turning it off and see if it helps.
EDIT:
1. Looks like I misread about "it is not used when shooting in RAW".
2. Turned it off, looks like things improved for 3-second intervals (but still - very short test, sometimes those inconsistencies start after about 20 or even 25 shots (starting from empty card - I've heard that there might be slowdown when card is filled, so I tried to eliminate that). But for 1 and 2 second interval problem still persist.
EDIT 2:
I turned off "display image preview" in Canon settings and it seems that problem is solved - it was generation/display of image preview which consumed time/etc or somehow in other way delayed it...
Quote from: neveripe on July 20, 2014, 01:57:56 PMEDIT 2:
I turned off "display image preview" in Canon settings and it seems that problem is solved - it was generation/display of image preview which consumed time/etc or somehow in other way delayed it...
Fine. I turned image preview off some years ago and haven't thought about this causing problems.
Ciao
Walter
Quote from: Walter Schulz on July 20, 2014, 02:23:00 PM
Fine. I turned image preview off some years ago and haven't thought about this causing problems.
Ciao
Walter
Thank you very much for your help, Walter! :)
I will double check it today - going to hunt for some timelapses today and tomorrow - if it will happen again even with preview turned off - I will post here.
P.S. And anyway - it might be worth adding some kind of warning on that when user sets intervalometer delay too low? Or even some kind of automatic turn off of it?
Turning off Canon's image preview when intervalometer is active? I'm not a developer and that's a question for them.
A short remark in intervalometer menu about better turning it off looks like a good idea.
Ciao
Walter