Intervalometer and 600D problem

[tstallan]

Hi All,

I discovered and downloaded Magic Lantern (V2.3) yesterday and decided to experiment with the Timelapse using the Intervalometer last night to capture the transaction from day to night and the stars.

I had set my camera to AV mode, 400 ISO, manual white balance and set ML Intervalometer to take a picture once every 20 seconds.

All seemed to go well until I took a look at the last images around midnight. The shutter speed was 8 seconds. I know from experience that in AV mode, at that time of night, the shutter speed should have got to around 30 seconds. When I looked at the other "night" images the majority were 8 seconds, a few were 6 seconds an one was 15 seconds.

I tried manually releasing the shutter and sure enough the shutter speed was 30 seconds as it should have been.

I started the ML intervalometer again and shutter speed was 8 seconds. Playing around with the interval made no difference.

I tried again this morning, in a dark closet, and again manually the shutter speed was 30 seconds. With ML Intervalometer the initial shutter speed was 15 seconds and a second shot was 30 seconds.

Why would this happen. Is there another setting that is interfering. Surely the shutter speed when using the Intervalometer should be the same as when I release the shutter manually.

Many thanks in advance for any help and advice given

Tony

[a1ex]

Canon metering does not work well in complete darkness. Try bulb ramping. The one from nightly should be a lot smoother.

[tstallan]

Hi Alex,

I have done this many times with my external intervalometer with no problems whatsoever. AV Priority mode works just fine.

Also when I press the shutter release manually the shutter speed is always as expected.

This problem only happened when I used the ML Intervalometer and if there is a problem with my ML setup I would rather resolve that before moving onto something else.

Regards

Tony

[tstallan]

Hi Alex,

I just looked at your bulb ramping examples and they look fantastic. Obviously that does seem to be the way to go.

It is just a little concerning that my tests with the intervalometer seem to fail at the first hurdle.

Regards

Tony