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| Poor | Average | Good | Excellent | |
|---|---|---|---|---|
 Screen size | 1.5 in Best: Sony Cyber-shot DSC-W710 Screen size: 6.7 in | |||
 ISO maximum | 400 Best: Pentax KP ISO maximum: 819200 | |||
 Effective pixels | 5 Mpx Best: Hasselblad H6D-100c Effective pixels: 100 Mpx | |||
 Max resolution | 2592 x 1944 px Best: Leica M11 Max resolution: 9528 x 6328 px | |||
| Sensor type | CCD |
|---|---|
| Sensor size | 0.28 in |
| Sensor photo detectors | 5.0 Mpx |
| Effective pixels | 5.0 Mpx |
| Image ratio w:h | 4:3 |
| Max resolution | 2592 x 1944 px |
| Other resolutions |
|
| Optical zoom | 5.0 x |
|---|---|
| Digital zoom | 4.0 x |
| Minimum aperture | 2.8 |
| Maximum aperture | 4.6 |
| Focal length equiv | 38 - 188 |
| Autofocus |
|
| Manual focus | yes |
| Normal focus range | 23.62 in |
| Macro focus range | 0.79 in |
| Minimum shutter speed | 4.0 s |
|---|---|
| Maximum shutter speed | 1.0 s |
| Shutter priority | yes |
| Aperture priority | yes |
| Exposure compensation plus | 2 |
| Exposure compensation minus | -2 |
| Expousure compensation steps | 1/3 |
| Built-in flash | yes |
| Flash range | 5.2 |
| Flash modes |
|
| External flash | no |
| Self-timer | yes |
| Weight | 8.82 oz |
|---|---|
| Width | 3.94 in |
| Height | 2.32 in |
| Depth | 1.57 in |
| Battery technology | Lithium-Ion |
|---|
| Timelapse recording | yes |
|---|---|
| Orientation sensor | no |
| ISO |
|
|---|---|
| ISO Auto | yes |
| ISO minimum | 64 |
| ISO maximum | 400 |
| White balance presets | 6 |
| Custom white balance | yes |
| Image stabilization type | No |
| Uncompressed format | TIFF |
| Screen size | 1.5 in |
|---|---|
| Touch screen | no |
| Live view | yes |
| Viewfinder | Optical |
| Body type | Compact |
|---|---|
| Environmentally sealed | no |
| Internal storage | 16.0 mB |
|---|---|
| Storage types |
|
| HDMI | no |
|---|---|
| USB version | 1.0 |
| Remote control | yes |
Pentax announced the aluminium alloy clad Optio 450 and 550 two weeks before PMA 2003. Both cameras share the same feature set, body design and impressive five times optical zoom lens. The Optio 450 has a four megapixel sensor, the 550 a five megapixel sensor. At the time of writing this review the Optio 550 is the only compact five megapixel digital camera with a five times optical zoom lens - the Sony DSC-F717 and Nikon Coolpix 5700 aren't classed as compact, the next nearest would be Sony's DSC-V1 with a four times optical zoom lens. The Optio 550 sports a wide range of manual controls, flexible settings and a powerful Lithium-Ion rechargeable battery which puts it up at the prosumer end of the market, a street price of around US$600 means it's a very attractive proposition for anyone considering a five megapixel prosumer compact digital camera.
Pentax Optio 550
The Pentax Optio 550 is a powerhouse that delivers almost every digital camera feature, mode, and parameter imaginable.
