[rollsman4]

Does it make a difference which SD card to use for the 645D ? I am in the process of receiving the camera in about a week. Also, will it make a difference in Playback? I know it takes about 5 sec to review the image after you take it. Will the SD card;s speed have any affect on getting it to Playback faster? Thank you

[Ole]

Yes, the speed of the card matters, but you don't need a card that's faster than the camera can utilize.

I would think that a 30 to 45 MB/s is about the speed that the 645D can utilize given the number of years this camera has under its belt.

The 645D does not support UHS-I, so there is no need to spend extra for a UHS-I compatible card.

Note that the firmware must be upgraded to 1.01 or higher or else the 645D cannot work with SDXC cards. Given the size of the files you' maywant to use SDXC cards due to their higher capacity (64 GB and up).

Sandisk Extreme 45 MB/s, 32 GB or 64 GB cards would be a good choice.

[rollsman4]

Thank you for your response. I just checked B&H photo and most of the SDHC cards are UHS-1 Is it possible that they no longer have the 32GB SDHC 45MB/s cards? I appreciate your time. Thanks