by Robert Giordano, updated 17 Jul 2011 7:48pm
The Canon EOS 1D Mark IV, 7D, and 5D, will record movies up to 4GB per clip or a maximum continuous movie capture time of 29 minutes and 59 seconds, whichever comes first. Depending on the level of detail in the scene, each 4GB clip will be approximately 12 minutes at full HD resolution or approximately 24 minutes in standard definition. Times will vary depending on the subject matter because of H.264 compression.
32GB card = approx. 96 min HD video, 192 min SD video
16GB card = approx. 48 min HD video, 96 min SD video
8GB card = approx. 24 min HD video, 48 min SD video