Mời các bác tham khảo:
***************************************************************************
Thank you for contacting Canon product support. We value you as a Canon customer and appreciate the opportunity to assist you with the speed rating of the PowerShot S3 IS.
Canon does not speed rate digital cameras. The write speed of the camera is limited by the drive inside the camera. Using a faster rated card may not perform any faster than a slower rated card. If you use a card reader capable of reading at the faster speeds, then you may experience faster downloads from the card reader.
The only features on our cameras that can utilize the high speed rated memory cards are the Continuous Shooting and video recording features.
The exact performance increases are not published. Unless these two feature are of extreme importance to you, you will honestly be wasting your money on a high speed rated memory card. The memory cards that come packaged with our cameras do not have a speed rating.
Your camera will accept both MMC (MultiMedia Cards) and SD (Secure Digital) cards. This includes newer SDHC memory cards that are over 2GB. Utilizing the newer SDHC or High Capacity cards, your camera should be able to accept any size cards available on the market today as well as into the future, up to 2TB. Even though memory cards do not come in capacities as high as a terabyte, the camera is capable of accessing that amount of memory.
Unfortunately, due to the ever-increasing number of companies manufacturing and selling these cards, we cannot test and evaluate all the different brands, sizes, and speeds of cards available in the retail market. As such, we are unable to speculate as to the performance of the camera with a particular card installed, or to recommend a specific type of card.
When it comes to memory cards, bigger is not always better. Please keep in mind that if you choose to purchase a very large card, and that card is subsequently lost, corrupted, or damaged, you will have lost a great deal of memory and many, many images. Extremely high-capacity cards are most often used by professional photographers who shoot several hundred (or even several thousand) images in a single session. They are not necessarily the best choice for the average digital camera owner. You may wish to consider investing in several smaller cards. If one of the cards is lost or damaged, you will have other cards to use. Another fact to consider is that as larger cards are introduced, the cost of smaller cards usually decreases. Of course, you may use whatever card you wish; the above information is provided so that you can make an informed decision.
We hope this information is helpful to you. Please let us know if we can be of any further assistance with your PowerShot S3 IS.
Thank you for choosing Canon.
Sincerely,
Technical Support Representative
***************************************************************************