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Pentax Optio A20 Point & Shoot Camera

The Pentax Optio A20 is a 10MP 1/2.5 inch compact camera — with 480p video. Check GearFocus for current availability, with buyer protection on every purchase.

Pentax Optio A20 Point & Shoot Camera

Pentax Optio A20 Point & Shoot Camera

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Camera Overview — Pentax Optio A20

The Pentax Optio A20 is a 10-megapixel point-and-shoot camera built around a 1/2.5-inch sensor, capable of capturing images at a maximum resolution of 3648x2736 pixels. It is a compact, metallic-bodied camera weighing just 145g, making it an easy carry for everyday shooting situations. The camera features a 2.5-inch TFT LCD display for composing and reviewing shots, and uses contrast detection autofocus to lock onto subjects.

For image stabilization, it relies on a Digital/Electronic IS system to help reduce the effects of camera movement. The ISO sensitivity range runs from 64 to 800, giving shooters some flexibility across different lighting conditions. Storage is handled via SD and SDHC cards, and the camera connects to other devices via USB.

It runs on a rechargeable lithium-ion battery. On the video side, the Optio A20 tops out at 480p resolution. The camera has no Wi-Fi or Bluetooth connectivity, and weather sealing is listed as none.

It is a straightforward, no-frills compact suited to casual, everyday photography where simplicity and portability are the main priorities.

Key Features — Pentax Optio A20

10MP 1/2.5-Inch Sensor: Captures images at up to 3648x2736 pixels, suitable for standard prints and everyday photo sharing.

145g Metallic Body: Compact and lightweight construction makes the camera easy to carry in a pocket or small bag.

2.5-Inch TFT LCD: Rear display covers composition and image review without the need for a separate optical viewfinder.

ISO 64–800 Range: Offers a low base ISO for clean daylight shots and extends to 800 for dim indoor or low-light situations.

Digital Image Stabilization: Electronic IS helps reduce the impact of camera shake during handheld shooting.

SD and SDHC Support: Compatible with widely available and affordable memory cards for straightforward storage.

Camera Specifications — Pentax Optio A20

Pentax Optio A20 full specifications
SpecDetail
Use CasesTravel
TypePoint and Shoot
Sensor1/2.5 inch
Resolution10MP
ISO Range64 – 800
AF SystemContrast Detection
Max Photo Resolution3648x2736
Max Video Resolution480p
Image StabilizationDigital / Electronic IS
Display2.5 inch TFT LCD
Storage MediaSD, SDHC
BatteryRechargeable Lithium-Ion

Description — Pentax Optio A20

The Pentax Optio A20 is a compact point-and-shoot camera built for everyday portability and ease of use. Its 10MP sensor and 1/2.5-inch sensor size deliver a maximum still resolution of 3648x2736 pixels, suitable for standard prints and casual sharing. The metallic body keeps the camera feeling solid while weighing in at just 145g, making it one of the more pocketable options in its class.

The rear 2.5-inch TFT LCD display handles both composition and image review duties. Autofocus is handled via a contrast detection system, and image stabilization comes in the form of Digital/Electronic IS. The sensitivity range spans ISO 64 to 800, and storage is covered by SD and SDHC cards.

The camera connects to computers via USB and is powered by a rechargeable lithium-ion battery. Video recording tops out at 480p. There is no Wi-Fi, Bluetooth, or weather sealing on this model.

Pros — Pentax Optio A20

  • ✓10MP sensor with 3648x2736 maximum resolution delivers detailed still images
  • ✓Lightweight metallic body at just 145g makes it highly portable
  • ✓2.5-inch TFT LCD provides a clear rear display for shooting and playback

Cons — Pentax Optio A20

  • ✗Video is capped at 480p resolution, which is very limited by modern standards
  • ✗Digital/Electronic IS only — no optical or in-body stabilization system
  • ✗No Wi-Fi or Bluetooth connectivity means no wireless file transfer

Videos — Pentax Optio A20

Pentax are the tiny camera underdogs! — Micro Four Nerds

Resources & Downloads — Pentax Optio A20

Manuals & Guides

Frequently Asked Questions — Pentax Optio A20

What is the maximum photo resolution of the Pentax Optio A20?+
The camera captures images at a maximum resolution of 3648x2736 pixels using its 10MP, 1/2.5-inch sensor. This is the highest still image output available on the camera.
What type of image stabilization does the Optio A20 use?+
The Optio A20 uses Digital/Electronic IS for image stabilization. It does not have in-body optical stabilization, so the stabilization is handled electronically rather than mechanically.
What memory cards are compatible with this camera?+
The Pentax Optio A20 supports SD and SDHC memory cards. Both formats are widely available and affordable, making storage easy to source.
Does the Optio A20 have wireless connectivity?+
No, the Optio A20 does not have Wi-Fi or Bluetooth. It does support USB connectivity for transferring files to a computer via a wired connection.
What is the ISO range on the Pentax Optio A20?+
The camera has an ISO range of 64 to 800. This provides some flexibility in different lighting environments, though the maximum of 800 is modest compared to newer cameras.
Is the Pentax Optio A20 weather sealed?+
No, the Optio A20 has no weather sealing. Care should be taken to protect the camera from rain, moisture, and dusty environments.

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