Sample Timings

The tables below show approximate timings for the minimum interval between photographs when triggering the shutter from the PC. The timings approximate and are for guidance only.

Size/Quality	Save to PC only	Save to camera only	Save to PC and camera
Raw only	3.5	2.2	4.2
Large/fine	2.5	2	3
Small/normal	2	2	2.2

When taking photos using the camera's shutter release the camera can take photos at its normal frame rate (3 frames/sec) until its buffers become full. After an initial camera processing delay the images will be transferred to the PC at approximately 3 Mb/sec. The camera is able to continue taking photos at a reduced frame rate until its secondary buffers become full and then has to wait for images to be downloaded before taking more photos.

Size/Quality	Save to PC only	Save to camera only	Save to PC and camera
Raw only	2.6	2.5	2.6
Large/fine	2.1	2	2.1
Small/normal	2	2	2

When taking photos using the camera's shutter release the camera can take photos at its normal frame rate (5 frames/sec for the 20D and 30D and 3 frames/sec for the 400D/Rebel XTi and 350D/Rebel XT) until its buffers become full. After an initial camera processing delay the images will be transferred to the PC at approximately 3 Mb/sec. The camera is able to continue taking photos at a reduced frame rate until its secondary buffers become full and then has to wait for images to be downloaded before taking more photos.

Size/Quality	Save to PC only	Save to camera only	Save to PC and camera
Raw	3.8	3	4.5
Large/fine	2.3	2.7	3.1
Small/normal	2	2.4	3

When taking photos using the camera's shutter release the camera can take photos at its normal frame rate (8 frames/sec) until its buffers become full. After an initial camera processing delay the images will be transferred to the PC at approximately 2.5 Mb/sec. The camera is able to continue taking photos at a reduced frame rate until its secondary buffers become full and then has to wait for images to be downloaded before taking more photos.

If the EOS-1D Mark II is set to continuous, high speed drive mode and the pictures are taken using the camera's shutter release (as opposed to triggering the shutter from the PC) it can sustain a shooting rate of approximately 3 frames/sec indefinitely when shooting in small/fine JPEG or large/normal JPEG.

Size/Quality	Save to PC only	Save to camera only	Save to PC and camera
Raw	3	1.5	2
Large/fine	3	1.5	3
Small/normal	2	1.5	3

When taking photos using the camera's shutter release the camera can take photos at its normal frame rate until its buffers become full. After an initial camera processing delay the images will be transferred to the PC at approximately 1.5 Mb/sec. The camera is able to continue taking photos at a reduced frame rate until its secondary buffers become full and then has to wait for images to be downloaded before taking more photos.

If the EOS-1D is set to continuous, high speed drive mode and the pictures are taken using the camera's shutter release (as opposed to triggering the shutter from the PC) it can sustain a shooting rate of approximately 3 frames/sec indefinitely when shooting in small/fine JPEG or large/normal JPEG.

Size/Quality	Save to PC only	Save to camera only	Save to PC and camera
Raw	35	8	41
Large/fine	14	5	17
Medium/fine	9	4	11
Small/fine	6	4	8
Small/normal	4	4	6

When taking photos using the camera's shutter release the camera can take photos at its normal frame rate until its buffers become full. After an initial camera processing delay the images will be transferred to the PC at approximately 0.25 Mb/sec. The camera is able to continue taking photos at a reduced frame rate until its secondary buffers become full and then has to wait for images to be downloaded before taking more photos.

Please note: The above timings were performed using a Canon EOS 10D with firmware version 1.0.0. The timings with firmware version 2.0.1 are approximately 50% longer.

Size/Quality	Save to PC only	Save to camera only	Save to PC and camera
Raw	57	8	55
Large/fine	19	4	20
Medium/fine	10	4	11
Small/fine	7	4	7
Small/normal	5	3	6

When taking photos using the camera's shutter release the camera can take photos at its normal frame rate until its buffers become full. After an initial camera processing delay the images will be transferred to the PC at approximately 0.18 Mb/sec. The camera is able to continue taking photos at a reduced frame rate until its secondary buffers become full and then has to wait for images to be downloaded before taking more photos.