Pentax Optio S45 Point & Shoot Camera
The Pentax Optio S45 is a 4MP 1/2.5 inch compact camera — with 640x480 video. Check GearFocus for current availability, with buyer protection on every purchase.
Pentax Optio S45 Point & Shoot Camera
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Camera Overview — Pentax Optio S45
Key Features — Pentax Optio S45
4MP 1/2.5-Inch Sensor: Captures images at up to 2304x1728 pixels, suitable for everyday snapshots and standard-size prints.
2.5-Inch TFT LCD: 115,000-dot rear display serves as the primary framing and review screen for day-to-day shooting.
Optical Tunnel Viewfinder: Provides an alternative to the LCD for composing shots, useful in bright outdoor conditions.
7-Point Contrast Detection AF: Covers a spread of focus points across the frame for straightforward subject acquisition.
ISO 50–400 Range: Low base ISO of 50 allows for cleaner exposures in bright light, with the range extending to 400 for dimmer conditions.
AA Battery Powered: Runs on two AA batteries, rated for approximately 180 shots with NiMH cells and widely available as replacements.
Camera Specifications — Pentax Optio S45
| Spec | Detail |
|---|---|
| Use Cases | Travel |
| Type | Point and Shoot |
| Sensor | 1/2.5 inch |
| Resolution | 4MP |
| ISO Range | 50 – 400 |
| AF System | Contrast Detection |
| AF Points | 7 points |
| Max Photo Resolution | 2304x1728 |
| Burst Rate | 2 fps |
| Max Video Resolution | 640x480 |
| Max Frame Rate | Other |
| Bit Depth | 8-bit |
Description — Pentax Optio S45
The Pentax Optio S45 is a compact point-and-shoot camera with a 4MP sensor housed in a 1/2.5-inch format. Its body — made from a plastic/metal composite — measures 89 x 58.5 x 27.5 mm and weighs just 180g, making it easy to slip into a pocket. The 2.5-inch TFT LCD with 115,000 dots handles most framing duties, but an optical tunnel viewfinder is also on board.
Autofocus uses contrast detection across 7 focus points. Still images are captured at up to 2304x1728 pixels with color profile choices of Standard, Black & White, and Sepia. Burst shooting runs at up to 2fps.
For video, the camera records at 640x480 resolution and 15fps in 8-bit depth. ISO sensitivity ranges from 50 to 400. A built-in flash covers a range of 0.2–3.5 m (wide, ISO 200) with Auto, On, Off, and Red-eye reduction modes.
Power comes from 2x AA batteries, with NiMH cells delivering approximately 180 shots per charge. Both SD cards and internal storage are supported, with USB available for file transfer.
Pros — Pentax Optio S45
- ✓Compact plastic/metal composite body at just 180g and 89 x 58.5 x 27.5 mm makes it highly portable
- ✓2.5-inch TFT LCD with 115,000 dots provides a reasonably sized rear screen for the camera's era
- ✓7-point contrast-detection autofocus system offers decent coverage across the frame
Cons — Pentax Optio S45
- ✗No image stabilization of any kind — inBodyIS, digitalIS, and optical IS are all absent
- ✗ISO tops out at 400, limiting low-light flexibility
- ✗Video is capped at 640x480 resolution at only 15fps
Videos — Pentax Optio S45
Making the Most out of a Point and Shoot Camera | Canon Powershot — Owen Faudree