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Sony Alpha 99 DSLR Camera

The Sony a99 is a 24MP full-frame DSLR camera — with 1080p video and in-body stabilization. Check GearFocus for current availability, with buyer protection on every purchase.

Sony Alpha 99 DSLR Camera

Sony Alpha 99 DSLR Camera

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Overview — Sony a99

The Sony Alpha 99 is a full-frame DSLR camera built around a 24MP sensor and powered by a Dual BIONZ image processor, delivering strong image quality across a broad ISO range of 50 to 25600. The autofocus system combines phase detection and contrast detection, with 19 phase-detection points (11 of which are cross-type) supplemented by 102 on-sensor points, plus subject tracking for capturing moving subjects reliably. In-body sensor-shift image stabilization is built in, helping to reduce camera shake without relying on stabilized lenses.

Burst shooting reaches up to 6 frames per second, making it a capable option for action and sports work. On the video side, the Alpha 99 records up to 1080p at frame rates of 24fps, 30fps, and 60fps in AVCHD or MP4 formats at 8-bit color depth, with both a 3.5mm headphone jack and microphone jack for audio monitoring and input. The OLED electronic viewfinder resolves 2,359,000 dots at 60Hz, while the 3-inch articulating LCD offers 1,229,000 dots of resolution for flexible framing.

The magnesium alloy body is weather sealed and measures 147 x 111 x 78mm at 812g. Connectivity includes full-size HDMI output and USB, though Wi-Fi and Bluetooth are not present.

Key Features — Sony a99

24MP Full-Frame Sensor: A 35mm full-frame CMOS sensor at 24MP delivers high-resolution files and strong image quality across a wide range of shooting situations.

ISO 50–25600 Range: Extended ISO flexibility lets shooters work confidently in both bright daylight and low-light environments.

Dual BIONZ Processor: Twin BIONZ image processors handle data faster than a single processor, supporting burst shooting and reducing noise in high-ISO images.

Hybrid Autofocus System: Combines 19 phase-detection points (11 cross-type) with 102 on-sensor contrast-detection points and subject tracking for reliable focus on stationary and moving subjects.

Sensor-Shift Stabilization: Built-in IBIS compensates for camera shake at the sensor level, providing stabilization benefit with any compatible A-mount lens regardless of optical stabilization.

OLED Electronic Viewfinder: A 2,359,000-dot OLED EVF with a 60Hz refresh rate provides a clear, detailed view for precise framing and manual focus work.

Specifications — Sony a99

Sony a99 full specifications
SpecDetail
Use CasesSports, Wildlife, Travel
TypeDSLR
SensorFull Frame (35mm)
Resolution24MP
ProcessorDual BIONZ
ISO Range50 – 25600
AF SystemPhase Detection, Contrast Detection, Hybrid (Phase + Contrast)
AF Points19 (11 cross-type) + 102 on-sensor
Max Photo Resolution6000x4000
Burst Rate6 fps
Max Video Resolution1080p
Max Frame Rate60fps

Description — Sony a99

The Sony Alpha 99 is a full-frame DSLR camera equipped with a 24MP sensor and a Dual BIONZ image processor. The ISO range spans 50 to 25600, offering meaningful flexibility for shooting in varied lighting conditions. Autofocus combines phase detection and contrast detection, with 19 phase-detection points (11 cross-type) and 102 on-sensor contrast-detection points. Subject tracking is supported.

Built-in sensor-shift IBIS helps reduce camera shake at the sensor level. Still shooting reaches up to 6 frames per second in burst mode, with a maximum resolution of 6000 x 4000 pixels. Video records at up to 1080p / 60fps in AVCHD or MP4 at 8-bit depth, with a 3.5mm microphone jack and 3.5mm headphone jack for audio control.

The OLED electronic viewfinder resolves 2,359,000 dots at 60Hz, complemented by a 3-inch articulating LCD at 1,229,000 dots. The magnesium alloy, weather-sealed body weighs 812g and connects via full-size HDMI and USB.

Pros — Sony a99

  • ✓Full-frame 24MP sensor with wide ISO range of 50–25600, providing flexibility across lighting conditions
  • ✓Dual BIONZ image processor for efficient image handling
  • ✓Hybrid autofocus with 19 phase-detection points (11 cross-type) plus 102 on-sensor contrast-detection points and subject tracking

Cons — Sony a99

  • ✗No Wi-Fi or Bluetooth connectivity for wireless image transfer or remote control
  • ✗Video limited to 1080p maximum resolution with 8-bit color depth only
  • ✗Memory Stick PRO Duo slot alongside SD adds little practical value for most users today

Reviews — Sony a99

Videos — Sony a99

Sony a99 II Hands-on Review — Kai W

Resources & Downloads — Sony a99

Manuals & Guides

Frequently Asked Questions — Sony a99

Does the Sony Alpha 99 have in-body image stabilization?+
Yes, the Alpha 99 includes sensor-shift in-body image stabilization (IBIS). Digital IS is not included. This means stabilization is applied at the sensor level and works with lenses that do not have their own optical stabilization.
What video formats and resolutions does the Alpha 99 support?+
The camera records video up to 1080p at frame rates of 24fps, 30fps, and 60fps. Supported formats are AVCHD and MP4, both at 8-bit color depth. There is no 4K recording capability on this camera.
Does the Alpha 99 have Wi-Fi or Bluetooth?+
No, the Alpha 99 does not include Wi-Fi or Bluetooth. Connectivity options include USB, full-size HDMI output, a 3.5mm headphone jack, and a 3.5mm microphone jack.
What memory card types does the Sony Alpha 99 accept?+
The Alpha 99 accepts SD, SDHC, and SDXC cards, as well as Memory Stick PRO Duo media. Standard SD-family cards are the most practical choice for most users.
How does the autofocus system work on the Alpha 99?+
The autofocus system combines phase detection and contrast detection. There are 19 dedicated phase-detection points, 11 of which are cross-type, along with 102 on-sensor contrast-detection points. Subject tracking is supported, though eye tracking is not.
Is the Sony Alpha 99 body weather sealed?+
Yes, the specifications confirm the body carries weather sealing. It is constructed from magnesium alloy and measures 147 x 111 x 78mm with a weight of 812g.
How do I check the shutter count on the Sony Alpha 99?+
We have a complete guide to checking the shutter count on the Sony Alpha 99, including what counts to look for when buying used. Read the full Sony Alpha 99 shutter count guide.

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