- Equisolid angle projection fisheye zoom lens
- Newly designed 2 group zoom optical system
- Achieves a fisheye lens with three differing imaging elements.
- Full size: circular fisheye to full-frame fisheye; APS-C & APS-H: full-frame fisheye to ultra-wide (with distortion aberration)
- Uses a UD lens and an aspheric lens to ensure high-quality images with the highest levels of image resolution
- Highly resistant to dust and water intrusion, enabling shooting even in harsh conditions.
- Manual focusing enabled even during AF mode (full-time mechanical manual focus).