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Home: Video University Forums: Sony DV and DVCAM Forum:
VX1000E - Bizarre Problem

 

 


X-Phil_C
Imported Account

Apr 8, 2001, 4:26 AM

Post #1 of 4 (742 views)
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VX1000E - Bizarre Problem Can't Post

Can anyone tell me if there are any components inside the VX1000 which are likely to be sensitive to compas point direction! I've noticed that my camera's autofocus control is absolutely useless whenever the camera is pointing due South!
This problem persists in every location I have tried (interior and exterior). It seems very definitely more than co-incidence.
Any help much appreciated.


X-John_Beale
Imported Account

Apr 8, 2001, 4:32 PM

Post #2 of 4 (742 views)
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Re: VX1000E - Bizarre Problem Can't Post

: Can anyone tell me if there are any components inside the VX1000 which are likely to be sensitive to compas point direction! I've noticed that my camera's autofocus control is absolutely useless whenever the camera is pointing due South!
I have no idea what could cause that or how to fix it, but I do want to nominate it for "most wierd"; it is the strangest camera problem I've ever heard of.
I will mention that the earth's DC magnetic field of 0.5 gauss is very weak compared with many AC magnetic fields near appliances, etc. If it really is south-pointing related, I'd look around for something else in the environment- overhead high-tension lines running north-south for example? Or for some reason you tend to tilt the camera down when facing south, and a lens or circuit element is loose and falls out of position in that orientation.


X-andre
Imported Account

Apr 8, 2001, 5:09 PM

Post #3 of 4 (743 views)
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Re: VX1000E - Bizarre Problem [In reply to] Can't Post

: : Can anyone tell me if there are any components inside the VX1000 which are likely to be sensitive to compas point direction! I've noticed that my camera's autofocus control is absolutely useless whenever the camera is pointing due South!
: I have no idea what could cause that or how to fix it, but I do want to nominate it for "most wierd"; it is the strangest camera problem I've ever heard of.
: I will mention that the earth's DC magnetic field of 0.5 gauss is very weak compared with many AC magnetic fields near appliances, etc. If it really is south-pointing related, I'd look around for something else in the environment- overhead high-tension lines running north-south for example? Or for some reason you tend to tilt the camera down when facing south, and a lens or circuit element is loose and falls out of position in that orientation.
If this is not a joke...Put a magnet (loudspeaker..) near your camcorder and report us if it changes the behaviour of your autofocus. Such a magnet can easely generate (locally)10 times the earth magnetic field strength, so it should have an influence. How precise do you have to point to the south? What do you mean by useless (hunting...?). There is not a single element in the autofocus optics/electronics concept which is influenced by DC magnetic fields.
Andre


X-Arnt_Richard_Rrvik
Imported Account

Apr 20, 2001, 4:29 AM

Post #4 of 4 (742 views)
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Re: VX1000E - Bizarre Problem [In reply to] Can't Post

: : : Can anyone tell me if there are any components inside the VX1000 which are likely to be sensitive to compas point direction! I've noticed that my camera's autofocus control is absolutely useless whenever the camera is pointing due South!
::..... If it really is south-pointing related, I'd look around for something else in the environment
Agree. My first reaction is "polarization" or some other optical phenomena. Try this out during the day; put the camera on a tripod; balance it nicely; and do a test at the following directions e.g. at 9 a.m., 12 a.m. and 3 p.m.:
- towards sun
- to the south
- to the west
- to the east
- to the north
- and note the autofocus function each time. If it's a polarizing problem; you may also remove any non-circular/linear only polarizing filters you may be using; replacing them with a circular one (one that actually have both a linear polarizer - in front, as well as a layer twisting the polarizing direction "circularly" on the inside).
Good luck!