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On my Canon 40D, the sub-one second exposure settings show just a plain number and ignoring the values in-between, run something like:
8000, 4000, 2000, 1000, 500, 250, 125, 60, 30, 15, 10, 8, 4, 2 and these are for the denominator, that is, 1/xxxx so we get;
8000 = 1/8000 sec
60 = 1/60 sec.
The longer shutter speeds have an embedded ", so that:
30” = 30 secs
15” = 15 secs
4” = 4 secs
0”5 = ½ sec.
So if you see a plain number without the symbol “ then you are likely to be shooting at 1/number which is only useful for bright objects such as the Moon.
The slower shutter speeds generally only go up to 30 secs duration and so the slowest you can get under the Manual setting is 30” = 30 secs. To go longer than 30 secs you would need to use an interval timer or hold/lock the remote release manually and then release it manually after the exposure.
Cheers
Dennis
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