The MMC and Secure Digital cards are not the same but are interchangeable. The difference has to do with copy protection on the disk volume on the SD card. This extra feature makes the SD attractive for people who use them to MP3 players. No other cards are interchangeable. The Canon Power Shot A510 can set comes with only 16MB, so it would be best to invest in more memory capacity. What I would recommend is getting a memory card you will be able to use even if your need for the amount of pictures you want to change.
For this use I would recommend the SanDisk 1 GB Secure Digital memory card. Usually runs around $ 90 this card you can transfer large files, taking hundreds of photos, large movie files to process, and take photos at the highest resolution setting. If you are looking for something with less storage, but with an equally low cost. I would recommend the Kingston 512 MB SD memory card that runs from about $ 44. This card has a significantly less amount of photos, but still performs well.
Actually, the Kodak cards are probably made by Kodak and SanDisk still very few manufacturers these days and following most of everything. I use both Compact Flash and Secure Disc cards and I would be hard pressed to find any difference between the quality of the files stored on different types of cards or brands to see. And I’ve never heard of a problem of loss of quality due to a memory card.
What I experienced is the corruption of the files on a memory card.I have several digital cameras from different brands and one day loaded a CF card from one camera to another. I’m not sure but I think the secondary camera attempted to overwrite the directory first and causes the loss of some data and some files are corrupted. I suggest that you give yourself a program like RescuPro. It is a program that finds and recovers both lost and damaged files and wipes and deletes images files from a memory card.
Besides the price and the fancy name, the difference between each generation of SanDisk card is speed. Many people are unaware of this, but how quickly you can take pictures and speed of transfer to your computer really depends on the type of memory you have. General, SanDisk has a great reputation for making quick cards. The Sony A-100 has a burst rate of three frames per second, which is similar to my camera.
With a slower card will only be able to write five or six frames before the card has to stop with the camera. If you’re in sports, I propose that the III or IV, especially because you 10.2 megapixels, which eat up time to write.
Another thing is the speed your pictures to your computer. The best setup is a card reader and a USB 2.0 port. It also makes a big difference what type of card your photos are stored. If you transfer 200 10.2 MP RAW images, the difference between the original and IV can be minutes. The type of card is very important.Personally, since you save large files like 10.2 MP, I would go for the III or IV, but it’s up to you.