When the Canon DR-400 DC Coupler is connected to the CA-PS400, it allows the camera to draw power directly from an AC power source.
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Comments about Canon DR-400 DC Coupler:
The Canon DC coupler is great if you want to run your camera from wall power. The ideal situation for this is when you are shooting through to the computer.
However, you need to buy an additional adapter for it to go into the wall. This costs $100!
BTW you do not need it to clean the sensor.
Pros
Cons
Best Uses
Comments about Canon DR-400 DC Coupler:
Necessary to have this DR-400 DC Coupler
to use when cleaning the camera
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