> Not sure about the generalizable usefulness of this this gizmo is to
> reduce noise. A7RII and likely III allow for micro USB charging to be used
> with the battery in
> to provide more power. However the batteries seem to be a source of heat and
> the sensors run hot as it is. A dummy battery with an external source seems
> to reliably cut down on noise for long exposures.
Why not use the battery grip? That puts the batteries inside a housing
attached to the bottom of the camera. Same net effect...
Zero.
AG Schnozz
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