"Picky Details" for the Olympus D-590 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 Olympus D-590:
|
||
|
(secs) |
|
Power On -> First shot | |
LCD turns
on and lens extends forward. About average. |
Shutdown | |
First time is time to retract
lens, second time is worst-case buffer-clearing time. About average. |
Play to Record, first shot | |
Time until
first shot is captured. Quite fast. |
Record to play | |
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. On the slow side, particularly for images
just shot. |
Shutter lag, full autofocus | |
First time is at full wide-angle, second is full telephoto. Average. |
Shutter lag, prefocus | |
Time to capture, after half-pressing
shutter button. Very fast. |
Cycle Time, max/min resolution | 2.00 / |
First number is for large/fine files, second number is time for "TV" mode (640x480) images. Times are averages. In large/fine mode, shoots five frames this fast, then slows to about 2.7 seconds per shot. In TV mode, continues at this rate indefinitely. Buffer clears in 7.5 seconds in large/fine mode, and almost immediately in TV mode. Average for its price range. |
Cycle Time, continuous mode, max/min resolution | 0.92 / 0.90 (1.09 / 1.11 fps) |
First number is for large/fine files, second number is time for "TV" mode (640x480) images. Times are averages. In large/fine mode, shoots 3 frames this fast, then slows to about 3 seconds per shot. In TV mode, continues at this rate indefinitely. Buffer clears in 8 seconds in large/fine mode, and 2 seconds in TV mode. Average to a little slower than average for its price range. |
Average performance for both shutter lag and cycle time. The word that best describes the Olympus D-590's performance is "average." It's solidly in the middle of the range for most parameters, with a shutter lag that ranges from 0.84-0.88 second in full autofocus mode, and cycle times on the order of two seconds. Startup and shutdown times are also typical of cameras in its class.
Power
The Olympus D-590 uses a custom rechargeable LiIon battery for power. Here
are the power consumption numbers I measured for it in various operating modes,
along with the corresponding projected run times.
|
(@4.8 volts on the external power terminal) |
(3.7v, 1230mAh LiIon cell) |
Capture Mode | |
|
Half-pressed shutter | |
|
Memory Write (transient) | |
|
Flash Recharge (transient) | |
|
Image Playback | |
|
Generally good battery life. With a worst-case run time of just over
two hours in capture mode, the Olympus D-590 does better than most compact digital
cameras. If you plan on any extended outings with it, I do still recommend purchasing
a second battery, but for casual use, the included battery will probably be
sufficient.
Storage Capacity
The Olympus D-590 stores its photos on xD 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.
Resolution/Quality 16 MB Memory Card |
Fine | Normal | |
2272 x 1704 | Images (Avg size) |
5 2.8 MB |
16 962 KB |
Approx. Compression |
4:1 | 12:1 | |
2048
x 1536 |
Images (Avg size) |
20 785 KB |
- |
Approx. Compression |
12:1 | - | |
1600 x 1200 | Images (Avg size) |
24 642 KB |
- |
Approx. Compression |
9:1 | - | |
1280
x 960 |
Images (Avg size) |
38 417 KB |
- |
Approx. Compression |
9:1 | - | |
1024 x 768 | Images (Avg size) |
58 272 KB |
- |
Approx. Compression |
9:1 | - | |
|
Images (Avg size) |
90 176 KB |
- |
Approx. Compression |
5:1 | - |
Download Speed
The Olympus D-590 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 505 KBytes/second, a decent if not exceptional speed. (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.)
D-590 Test Images
D-590 Specifications
D-590 "Picky Details"
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