When choosing a professional camera, autofocus (AF) performance is a critical factor. The Sony A9 III and Olympus OM-1 are two flagship models that incorporate advanced AF systems, each excelling in different areas. This article compares their autofocus capabilities to help photographers decide which camera suits their needs best.

Sony A9 III Autofocus System

The Sony A9 III features a sophisticated autofocus system designed for speed and accuracy. It employs a real-time tracking system that utilizes AI-based algorithms to maintain focus on moving subjects seamlessly. The AF system covers approximately 92% of the image area, providing extensive coverage for dynamic shooting scenarios.

Key features include:

  • 693 phase-detection AF points
  • 425 contrast-detection points
  • Real-time Eye AF for humans and animals
  • Real-time Tracking that adapts to subject movement
  • High-speed autofocus acquisition in under 0.02 seconds

The system is optimized for sports, wildlife, and fast-paced photography, ensuring subjects remain sharp even in challenging conditions.

Olympus OM-1 Autofocus System

The Olympus OM-1 incorporates an advanced autofocus system tailored for versatile shooting. It features a combination of phase and contrast detection, enhanced with deep learning AI for improved subject recognition and tracking. The AF coverage spans approximately 100% of the frame, providing comprehensive focus points.

Key features include:

  • 1053 AF points with deep learning AI
  • Focus stacking and focus bracketing capabilities
  • Subject tracking optimized for both humans and animals
  • Fast autofocus acquisition suitable for action photography
  • In-body stabilization integrated with AF system

The Olympus AF system is highly adaptable, excelling in macro, landscape, and wildlife photography, with reliable tracking even in complex scenes.

Comparison Summary

Both cameras offer state-of-the-art autofocus systems, but they are optimized for different photography styles. The Sony A9 III emphasizes speed and tracking for fast-moving subjects, making it ideal for sports and wildlife. The Olympus OM-1 offers versatile AF with extensive coverage and AI-enhanced subject recognition, suitable for a broad range of photography including macro and landscape.

Key Differences

  • Sony A9 III: Focus points primarily for speed and tracking in high-speed scenarios.
  • Olympus OM-1: Focus points for comprehensive coverage and versatility across various genres.
  • AI subject recognition is advanced in Olympus, with deep learning for better tracking.
  • Sony’s AF system is faster in acquiring focus, especially in continuous mode.

Conclusion

Choosing between the Sony A9 III and Olympus OM-1 depends on your photography focus. For rapid action and sports, Sony’s AF system provides unmatched speed and precision. For versatility and comprehensive coverage across different shooting conditions, Olympus’s AF system offers reliable performance enhanced by AI technology. Both systems represent the cutting edge of autofocus technology in modern cameras.