Jeff Keller wrote:
> People have reported that loose screws on the bottom plate can cause
> intermittant problems. If it is black, John recommends using silver
> battery caps. Check out the battery compartment for corrosion or a
> bent spring. It really sounds like a poor connection somewhere.
>
Yup, could easily be one of those things. OR - it could be the
batteries. This behavior is common when using alkaline batteries. Unlike
the best silver oxides, they start to drop in voltage fairly early after
starting use. Then they also drop in voltage under load much more than
proper silver oxide batteries. The 2 and later bodies intentionally are
designed to lock up if the voltage drops too low to assure correct
exposure. If it locks up, you KNOW the shot wasn't caught, rather than
getting a nasty surprise later. So under the trivial load of the test
circuit, the red light is fine, but under the much higher load of the
shutter curtain electro-magnets, the voltage drops and the camera locks
up until released.
So, they will often tend to work fine for the occasional short exposure
shot, but lock up with longer exposures or the second or third exposure
in rapid succession.
Moose
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