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Digital cameras on the whole have a tendancy to drink battery acid, much like I drink cocktails at an all-inclusive hotel - quickly and in large quantites. The main drains on battery power are using the LCD screen and transferring your images to the computer.
The camera I use most is the Minolta Dimage 7, which is particularly bad at battery management - allowing me less than 100 shots on a full high capacity 2400mAh battery charge. Using batteries to transfer 256Mb of data is downright silly, therefore it was pretty much essential to have the optional power adapter. On a camera of this price, I can't really understand why it was optional, then again if you could afford this camera, you could spend the extra on an adapter - great thinking by the Minolta men in marketing.
There's not a whole lot to talk about. The adapter is a 100-240V input type, meaning as long as you have the right plug you can use this anywhere in the world without any voltage worries. It outputs 6V DC, which the Minolta range needs. The top of the adapter has the Minolta logo, as well as the model number. There's also a small green LED which lights up when you've got it plugged in. One end of the adapter has a pretty much world standard socket (WS-027) used by radios and the like for years. The other end has the L shaped plug which plugs into the camera power socket, and also has a RF filter to prevent any noise issues. I like the fact that both cables are in excess of 2 metres, meaning you can place the camera well away from a power source without worrying about it reaching. This is useful when using the camera indoors to do photographs, in all parts of a room.
It's not a fault with the adapter itself, but where Minolta chose to put the DC in socket, makes it troublesome for the camera to sit comfortably on a desk. No problems when it' s on a tripod however.
As well as the Dimage 7, the Minolta AC-2L is suitable for the following cameras:
Price ranges from about £30 - £45, depending where you get it. This is quite steep, but if you do a lot of indoor work, it can save a lot of charging of batteries. It's also essential for image transfer, and no Minolta user should deny their need for one.