Judging from the specs, class 4 cards should be enough for an AVCHD camcorder:

http://en.wikipedia.org/wiki/Secure_Digital_card#SDHC

Anybody tried either 4 or 6? Did both work?

__________________
Florin Andrei

http://florin.myip.org/

According to HF10/100 manual you can use both. However Class 6 16GB cost only around $65 (checkout newegg.com).

I just returned a 16gb PQI brand SDHC card because it was too slow. Even though it was rated as class 6, it could not keep up with the data stream sent by the camera. The card was very slow to format, slow to store files, and slow to transfer files to the computer. Many of the clips I took on Easter has missing sections and corrupted sections. I really had to do a lot of work to cut out the bad sections and save what was left as a movie memory of the Easter Brunch. So the card went back to Newegg.com the next day and there is a 16gb Transcend card on the way to replace it. I have an 8gb Transcend SDHC card which works just fine.

The fastest card available these days is the ATP Pro Max but it costs several times as much as the Transcend card which was the same price as the PQI card, around $60.

I bought the cheapest 16GB A-data card at newegg (which now dropped to $59+$5 shippinh). Works great with the HF100. I haven't tested exact transfer rates but I copied several files pretty quickly.

The class only indicates the write speed. So you don't know the exact read speed but this is better than the old (read) speed indication.

I just got my HF100, and at the same time, a pair of Transcend SDHC cards from Amazon. One 8 GB for a little over $30, and one 16 GB with a compact USB reader for about $70. Both are rated as Class 6.

Both work absolutely perfectly in FXP mode.

I also have an old 2 GB Patriot "no-class" () mini SD (not SDHC) card (with adapter) that I threw in, just to see; and it will record in XP+ just fine, even though the cam warns me that it may not work. I recorded for three minutes, just to make sure there was no 2 minute cache that was being filled before writing to the SD card; and when I imported the three minute video, it worked just fine. The cam won't even attempt to record in FXP mode on it, though.

I have the A-data 16GB Class 6 and it works just fine but I had now one time that the cam said 'cannot read card' or something like that (and then it worked again second later). It happened when the card was almost full. However the USB reader can read the card just fine.

I wonder if HF100 has a limitation of max files per directory. I noticed it put's everything in one folder for some reason (I had 600+ files in 1 directory).

The manual warns that you could have problems transferring photos or videos to the computer if you have more than 1000 files; but it doesn't say anything about the cam itself having any such limitation. (And it does mention that if you run into the problem, a card reader should work fine still.)

Thanks for the info on the A-Data 16 GB card, just picked one up tonight at Fry's for my HF10, seems to work just fine!