Memory Cards, Memory Buffers and Camera Response Speeds
In order to better understand the reasons for the slow response in digital cameras, one needs to understand the process of how an image is captured by the camera and stored on the memory card.
When the shutter button is clicked, the image is captured and written onto the camera's memory buffer. From the memory buffer, the image is transferred to the memory card. As long as the memory buffer has free space, one can keep clicking photographs.
However, once the memory buffer is full, the data has to be transferred to the memory card before any further photographs can be taken. This is usually indicated by the red busy light blinking on the camera.
In order to avoid slow response in digital cameras due to the above described problem, the following techniques can be used:
Purchase a camera with a larger memory buffer. This will ensure that the buffer does not get full quickly while taking consecutive images in burst mode. However, it's most likely that you have run into this problem after purchasing the camera.
- If you have already purchased the camera, and have this problem due to a small memory buffer, you can avoid it by purchasing a memory card with a higher write speed. This ensures that the data gets transferred to the memory card and the memory buffer gets cleared quickly.
For cards with higher write speeds, take a look at Class 6 SDHC Cards on Amazon.com.
Ensure that the faster memory card you purchase is supported by your camera. Read the article How Important is the Speed of a Memory Card? for a detailed explanation.