
The PG-31 also incorporates a shutter button and therefore becomes a grip for vertical photography when attached to the SD1, providing a more assured grip.
Sigma PG-31 Power Grip Specifications
Power | Lithium-ion battery BP-21 (1 or 2) |
Weight | 300g (excluding battery) |
Dimensions | Width 156mm× Height 72mm× Depth 77mm |
SRP | TBA |
Availability | January 2012 |
For more information please visit the Sigma Imaging website.

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