Does a Class 4 card work with T2i / 7D?

Euisung Lee · March 29th, 2010, 01:55 AM

I've been using SanDisk Ultra class 4 cards on T2i and I haven't had any problem so far. I happened to have it so I started using with the new Canon cam not knowing that it is technically below the recommended spec - class 6.

What confuses me is the actual speed of this card. Although it says class 4, it also notes 15MB/s on it and I wonder if it is fast enough for writing video files. For test purpose I just kept it recording as writing this post and it recorded fine until it reached 4GB size limit (13' 41" length) without the buffer gauge popping up.

I still wouldn't recommend buying a class4 card, but I wanted to share my case of successfully using this unusual class 4 card from sandisk on T2i.

March 29th, 2010, 01:55 AM	#16
Euisung Lee Regular Crew Join Date: Apr 2006 Location: San Francisco, CA Posts: 57	I've been using SanDisk Ultra class 4 cards on T2i and I haven't had any problem so far. I happened to have it so I started using with the new Canon cam not knowing that it is technically below the recommended spec - class 6. What confuses me is the actual speed of this card. Although it says class 4, it also notes 15MB/s on it and I wonder if it is fast enough for writing video files. For test purpose I just kept it recording as writing this post and it recorded fine until it reached 4GB size limit (13' 41" length) without the buffer gauge popping up. I still wouldn't recommend buying a class4 card, but I wanted to share my case of successfully using this unusual class 4 card from sandisk on T2i.