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Canon PowerShot A410
"Picky Details" for the Canon PowerShot A410 digital camera
(Timing, Power, and Storage Info)
Timing
When you press the shutter release on a camera, there's usually a lag time or delay before the shutter actually fires. This corresponds to the time required for the autofocus and autoexposure mechanisms time to do their work, and can amount to a fairly long delay in some situations. Since this number is rarely reported on (and even more rarely reported accurately), and can significantly affect the picture taking experience, I routinely measure both shutter delay and shot to shot cycle times for all cameras I test, using a test system I designed and built for the purpose. (Crystal-controlled, with a resolution of 0.001 second.) Here are the numbers I collected for the Canon PowerShot A410:
|
Canon PowerShot A410 Timings
|
|
Operation
|
Time
(secs)
|
Notes
|
| Power On -> First shot |
1.1
|
LCD turns on and lens extends forward.
|
| Shutdown |
1.7 - 4
|
First time is time to retract lens, second time is
worst-case buffer-clearing time.
|
| Play to Record, first shot |
1.6
|
Time until first shot is captured.
|
| Record to play |
2.0 - 1.6
|
First time is that required to display a large/fine
file immediately after capture, second time is that needed to display
a large/fine file that has already been processed and stored on the
memory card.
|
| Shutter lag, full autofocus |
0.76 / 0.64
|
First time is at full wide-angle,
second is full telephoto. |
| Shutter lag, prefocus |
0.062
|
Time to capture, after half-pressing shutter
button. |
| Cycle Time, single shot mode |
1.83
|
Times are averages. Regardless of resolution, shoots at this rate indefinitely, clearing the buffer after each shot. |
| Cycle Time, Flash exposures
|
10 |
Flash at maximum power output. |
| Cycle Time, continuous mode |
0.42 (2.4 fps) |
Times are averages. Regardless of resolution, shoots at this rate seemingly indefinitely. Buffer clears in 2 seconds after over 100 large/fine images, almost immediately for lowest resolution.
|
Power
The Canon PowerShot A410 uses a two AA batteries for power, and ordinary alkaline batteries are included with the camera. The table below shows the power drain I measured in various operating modes, and the corresponding run times to be expected from a standard set of 1600 mAh NiMH cells.
|
Operating Mode
|
Power (@3.3 volts on the external power terminal)
|
Est. Minutes (two 1600 mA cells)
|
| Capture Mode, w/LCD |
302 mA
|
231
|
| Capture Mode, no LCD |
42 mA
|
1676
|
| Half-pressed shutter w/LCD |
302 mA
|
231
|
| Half-pressed w/o LCD |
239 mA
|
291
|
| Memory Write (transient) |
260 mA
|
n/a
|
| Flash Recharge (transient) |
490 mA
|
n/a
|
| Image Playback |
90 mA
|
779
|
Storage Capacity
The Canon PowerShot A410 stores its photos on SD / MMC memory cards, and a 16 MB card is included with the camera. (I strongly recommend buying at least a 64 MB card, preferably a 128 MB one, to give yourself extra space for extended outings.) The chart below shows how many images can be stored on the included 16 MB card at each size/quality setting.
Image Capacity vs
Resolution/Quality
16 MB Memory Card
|
Fine |
Normal |
Basic
|
2048
x 1536
|
Images
(Avg size) |
9 1.7 MB |
16 943 KB |
33 479 KB |
Approx.
Compression |
6:1 |
11:1 |
20:1 |
| 1600
x 1200 |
Images
(Avg size) |
15 1.1 MB |
26 595 KB |
50 314 KB |
Approx.
Compression |
5:1 |
10:1 |
18:1 |
| 1024
x 768 |
Images
(Avg size) |
26 612 KB |
46 347 KB |
80 198 KB |
Approx.
Compression |
4:1 |
7:1 |
12:1 |
|
640 x 480
|
Images
(Avg size) |
56 281 KB |
88 182 KB |
138 116 KB |
Approx.
Compression |
3:1 |
5:1 |
8:1 |
Download Speed
The Canon PowerShot A410 connects to a host computer via a USB interface. Downloading files to my Sony desktop running Windows XP (Pentium IV, 2.4 GHz), I clocked it at 771 KBytes/second. (Cameras with slow USB interfaces run as low as 300 KB/s, cameras with fast v1.1 interfaces run as high as 600 KB/s. Cameras with USB v2.0 interfaces run as fast as several megabytes/second.)
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