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Timings & File Sizes

The little IXUS v is quick, you never really find yourself having to wait for it, startup, image processing and shot to shot times are good. It also has an internal buffer sufficiently large that you can keep firing off the shots without having to wait for images to be written out to the Compact Flash card. Shutter lag is good as is AF speed. It looks like the manufacturers are finally realising that speed and lag times are important in a digital camera, even one aimed at the "point and shoot" market.

Timing Notes: All times calculated as an average of three operations. Supplied CF card was ued for timings involving file transfer. Unless otherwise stated all timings were made on a 1600 x 1200 Super-Fine JPEG image (approx. 950 KB per image).

Action Details Time taken
(seconds)
Notes
Power: Off to Record   3.3 Lens takes 1.5 secs *1
Power: Off to Play   1.8 "Busy" displayed *2
Power: Record to Off   1.8 Lens retract
Power: Play to Off   0.7  
Mode: Record to Play   0.8 "Busy" displayed *2
Mode: Play to Record   2.2  
Play: Magnify   <0.5  
Rec: Thumbnail view 3 x 3 thumbnails 1.5  
Auto Focus LAG   0.5 - 1.2 Fast *3
Shutter Release LAG   0.1 Fast
Total LAG   0.7 - 1.5 Fast to Average
Off to Shot Taken   3.5 Very fast
Shot to Shot 1600 x 1200 JPEG Super-Fine 1.6 Very fast

*1 This time includes the 1.2 second power button hold required to initiate power-up.
*2 Camera displays "Busy", image is displayed about 1.5 seconds later
*3 Generally autofocus times are below 1 second, this tends be longer for macro focus or when the AF assist lamp comes on.


Continuous drive mode

The table below shows the results of our continuous shooting test, indicating the actual frame rate along with maximum number of frames at a selection of image resolution / quality settings and how long you would have to wait after taking the maximum number of frames before you could take the next shot.

Image Type Frames per sec
(review off) *
Max no. of frames

Wait before
restarting

1600 x 1200 Super-Fine 2.0 fps 6 3 secs
1600 x 1200 Fine 2.0 fps 10 3 secs
1600 x 1200 Normal 2.0 fps 22 3 secs
1024 x 768 Fine 2.1 fps 24 3 secs
640 x 480 Fine 2.3 fps 51 3 secs

* (At 1600 x 1200) the camera shot one frame every 0.5 seconds AFTER the second frame which was taken 0.8 seconds after the first (e.g. 0 sec, 0.8 sec, 1.3 sec, 1.8 sec, 2.3 sec etc.).

These results are surprisingly good for a camera which isn't targetted at "prosumers", indeed frame rates and maximum number of frames are well up (2 fps vs. 1 fps) from the original Digital IXUS, possibly a sign of a larger internal buffer and better implemented image algorithms?


File Flush / Display Timing

Timings shown below are the time taken for the camera to process and "flush" the image out to the Compact Flash card, the timer was started as soon as the shutter release was pressed (shutter noise was heard) and stopped when activity indicator LED beside the viewfinder went off. This means the timings also include the cameras processing time and as such are more representative of the actual time to "complete the task".

If you hold your finger down on either the left or right arrows the camera will very quickly scroll through the images using a rough image to represent them (we timed this display as about 4 images per second).

Store file of type Time to store
(seconds)

Time to
display
(seconds)
Approx.
File size *
Approx. images
on a 8 MB
Compact Flash card
1600 x 1200 JPEG Super-Fine 3.0 1.0 ~950 KB  7
1600 x 1200 JPEG Fine 2.5 0.8 ~450 KB   11
1600 x 1200 JPEG Normal 1.8 <0.5 ~160 KB   24
1024 x 768 JPEG Super-Fine 2.0 <0.5 ~320 KB  16
1024 x 768 JPEG Fine 1.8 <0.5 ~190 KB   24
1024 x 768 JPEG Normal 1.8 <0.5 ~100 KB   46
640 x 480 JPEG Super-Fine 1.8 <0.5 ~150 KB  35
640 x 480 JPEG Fine 1.8 <0.5 ~90 KB   50
640 x 480 JPEG Normal 1.8 <0.5 ~45 KB   87

* With JPEG it's difficult to predict the exact size of an image file because it will vary a fair amount depending on the content of the image (especially the amount of detail captured). For example, take a photograph of a fairly empty wall and you'll get a small JPEG, take a photograph of a bush with a lot of detail and you'll get a larger image. File sizes here are closer to the later, the larger size of file you should expect.


Battery life

As we expected with only a 680 mAh battery pack the Digital IXUS v only managed to last about an hour (during which time we took just over 90 frames) before the battery warning icon started flashing on the screen, around four minutes (and another 10 frames) later the camera powered down.

Considering the small size and weight of the battery pack it has to be said that it lasted relatively well, though if I were considering this camera I'd definitely invest in a second battery pack (they're so small and easy to carry too).

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