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Canon PowerShot G9 | Digital Camera Review | Storage and Energy
Just as on almost every compact camera, the pictures of the Canon G9 are stored on a Secure Digital flash memory card. Naturally this model supports the high capacity cards SDHC. You will certainly need them when you shoot frequently and in RAW format. The Lithium-Ion battery is an old acquaintance, but Canon succeeded in getting more pictures out of it than is possible with the Canon PowerShot G7.
Canon PowerShot G9 | Digital Camera Canon PowerShot G9 | Digital Camera
Canon PowerShot G9 - 4GB SD memory card
If you have read the preceding chapter really well, you will be convinced that shooting in RAW is the best thing to do. But it does influence the storage capacity. RAW files are quite large, with approximately 17 million pixels. Moreover, you can store in RAW and JPEG format at the same time so the camera will have to generate some 20MB! It might be obvious that you have to invest in memory cards too when purchasing the Canon G9. A 2GB card will suffice. However, I would certainly invest in a 4GB card, also because of the dropped prices nowadays. A fast memory card doesn't add a thing during photographing. An Ultra II card is fast enough and an Extreme III does not offer a lot more convenience other than speedier reading the card through the computer. The large files will be transferred to the computer quicker and the faster card will then come in handy.

Considering 4GB storage capacity:
RAW - 4000x3000 pixels - 17076KB - 108 pictures
RAW + JPEG - 4000x3000 pixels - 20160KB - 92 pictures
JPEG - Large - 4000x3000 pixels - 5208KB - 364 pictures
JPEG - Normal - 4000x3000 pixels - 3084KB - 620 pictures
JPEG - Small - 4000x3000 pixels - 1474KB - 1284 pictures
JPEG - Large - 3264x2448 pixels - 3436KB -556 pictures
JPEG - Normal - 3264x2448 pixels - 2060KB - 924 pictures
JPEG - Small - 3264x2448 pixels - 980KB - 1916 pictures
JPEG - Large - 2592x1944 pixels - 2503KB -760 pictures
JPEG - Normal - 2592x1944 pixels - 1395KB - 1356 pictures
JPEG - Small - 2592x1944 pixels - 695KB - 2684 pictures
PEG - Large - 1600x1200 pixels - 1002KB - 1884 pictures
JPEG - Normal - 1600x1200 pixels - 558KB - 3356 pictures
JPEG - Small - 1600x1200 pixels - 278KB - 6360 pictures
JPEG - Large - 640x480 pixels - 249KB - 7108 pictures
JPEG - Normal - 640x480 pixels - 150KB - 10988 pictures
JPEG - Small - 640x480 pixels - 84KB - 172687 pictures

Video - 1024-x768 pixels - 15fps - 1963KB/sec - 15 min 48 sec
Video - 640x480 pixels - 30fps - 1963KB/sec - 15 min 48 sec
Video - 640x480 pixels - LP - 30fps - 1003KB/sec - 30 min
Video - 320x240 pixels - 30fps - 703KB/sec - 41 min 56 sec
Video - 160x120 pixels - 15fps - 131KB/sec - 201 min 24 sec
Canon G9 - No action photography camera
If you think you can perform action photography with the Canon G9, then you are wrong. In JPEG the speed is not impressive and in RAW you can't even shoot 1 picture per second. The Canon PowerShot G9 is a good camera for capturing those moments that don't put priority on action. And that is not a bad idea at all because pictures usually come out better when you take your time taking them. The RAW files are written to the card quite fast considering we're dealing with a compact camera. No comment on that, although it can never be fast enough. In JPEG you hardly notice the camera writing the pictures to the card.

Canon PowerShot G9 - USB 2.0 Hi-Speed connection
SD memory cards are available in various speeds. One advantage of a faster memory card is the faster speed of transferring data providing the computer and the device reading the card are equipped with a fast USB 2.0 Hi-Speed connection. Or you can choose to purchase a card reader. This is a handy device that needs to be connected to the USB port and that is capable of reading a card and writing to it rapidly. The device will be recognized by the computer as an external hard drive. Additionally you will also save energy.

Canon PowerShot G9 - NB-2LH Lithium Ion battery
The G9, like its predecessor, uses an NB-2LH Lithium-Ion battery with a capacity of 720 mAh. It does not offer the largest of capacity but according to Canon it lets you take approximately 240 pictures. In practice you will not be able to get that many out of it; in any case; I did not. The mentioned figures are conform CIPA standard and don't always agree with practice. One other reason is the large monitor obviously using up most of the energy. I would suggest taking a second battery with you just to be on the safe side. The separate battery charger lets you charge the battery outside the camera. Just as easy when you are travelling for example.
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