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12-05-2008, 09:25 PM   #16
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I would leave SR on for monopods as there is definitely still shake. As for the tripod, as long as it's sturdy and there's no vibration from the mirror locking up, you should turn it off. The floating sensor may get confused when there is no shake, trying to compensate for shake that isn't there. By doing that, it shakes the sensor itself, introducing shake into your image.

12-06-2008, 08:38 AM   #17
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QuoteOriginally posted by Ratmagiclady Quote
I'm just curious about the theory behind the phenomenon.
Once upon a time, I heard something like the following, and it made enough sense that I haven't really questioned it.:

The SR mechanism does two things: it detects camera motion, and it moves the sensor to counteract it. The detection is pretty sensitive, but the actual moving of the sensor is bit more inexact. When you're dealing with the relatively large & slow movements caused by camera shake when handheld, the mechanism that moves the sensor may not respond *perfectly*, but it's a heck of a lot better than the motion you'd otherwise getting. On a tripod, though, whatever camera movements might be present are much smaller and apparently higher frequency. The camera *tries* to correct for these small and fast movements, but the mechanism that moves the sensor just isn't that precise, and it ends up overshooting the mark.
12-06-2008, 11:32 AM   #18
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True Marc. SR moves the sensor about trying to counter any movement even when there isn't any, as on a tripod. This may cause a slight blur in an otherwise sharp image.
12-06-2008, 11:38 AM   #19
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OK. I've actually suspected the same of the OIS on this Lumix bridge camera I've been using a while. That system can be truly spectacular when I'm holding OK, but I've noticed it's not very helpful with higher-frequency shakes, such as I'm prone to on bad health days, (the little guy's so light that just about everything transmits. I was contemplating having someone machine a steel plate to fix to the bottom just for ballast. )

Anyway, seems a reasonable enough explanation to me.

12-06-2008, 07:49 PM   #20
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There are some good ideas here, but I think I will leave it of just in case
it does degrade the image. Whether or not it can cause damage to the sensor
or SR mechanism I don't know, but I'm not taking the risk.
12-06-2008, 08:07 PM   #21
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Mark Lagille,

I clicked on your web site link. Wow, are you good!

Last edited by LeoTaylor; 12-09-2008 at 07:41 PM. Reason: clarified

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