Setting a long exposure time in camera without a remote ?

Started Jan 12, 2014 | Discussions thread
Marianne Oelund Veteran Member • Posts: 7,039
Be Aware: Actual long-exposure times
1

jkjond wrote:

Here's a workround. It's far from ideal, and isn't a true long exposure but a collection of separate ones - so if your subject requires a 5 minutes to give a correct exposure, then its worthless. But if you want to capture 5 minutes of movement and can balance the aperture value or use a lesser ND filter than the one intended, then it is worth considering.

1. Set the multiple exposure menu option anywhere between 2 and 10 shots.

2. Set the camera exposure to 25 seconds and appropriate aperture and iso to give a correct exposure (and test)

3. Set the focus to M, for some reason, the interval timer will override any other settings and try to refocus.

4. Set the built in interval timer to 26 seconds. I don't think a 30sec exposure coupled to a 31 second interval works as it falls foul of the camera's 30 second rule! Note that the interval includes the exposure time, its the interval between starts of exposures, not the interval between separate exposures.

You can use any interval value you wish.  However, to make adequate allowance for the exposure time, you need to be aware that the camera's long exposure times are longer than the nominal value.

Setting 30 seconds actually gives you a 32-sec. exposure, so the interval will need to be 33 seconds.  Other long settings are up to 1 sec more than the nominal, e.g., the 25-sec. setting gives you about 26 seconds, so you could use a 27-sec. interval.

If you fail to set an adequate interval, the camera will miss every other exposure and the result is a very long interim wait.  Test your settings before using them in earnest.

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Qualities possessed by God in infinite proportion: Love, Grace, Power, Righteousness, Wisdom, . . .
Qualities possessed by humans in infinite proportion: Ignorance.
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