Hi DSLR-100,

welcome to the Sony User Community Forum..:smileyhappy:

According to the Sony support pages it looks like your A100 supports upto 8GB CF cards, click the following link for more details - What Compact Flash cards are compatible with the α100?

However I read on the ClubSnap forum that apparently Sony stated that the A100 can support upto 16GB but I can not find anything officially on any of the Sony sites..