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mmurph
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Re: 5DII failures on LL Antarctic trip


brainiac wrote:

BTW, the odds are quite interesting if you plan to take 5D2\'s to the antarctic. The important question is how many 5D\'s do you need to take to get a certain likelihood of at least one camera continuing to work. It goes like this:

2 cameras: 93.75%
3 cameras: 98.4%
4 cameras: 99.6%
5 cameras: 99.9%


No, that is backward.

The odds of all your cameras failing are:

2 cameras: 1/4 x 1/4 = 1/16

3 cameras: 1/4 x 1/4 x14 = 1/64

4 cameras: 1/4 x 1/4 x14 x 1/4 = 1/256

etc.

You pick the level of \"confidence\" that is acceptable - 90%, etc. - and plan accordingly.

But, 1/2 the failures were intermittent. Which means the camera started working again, so only a shorter down time.
Feb 07, 2009 at 02:21 PM





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