Product Highlights: 1. X-Mount Lens/APS-C Format 2. 12-24mm (35mm Equivalent) 3. Aperture Range: f/2.8 to f/22 4. Three ED and Four Aspherical Elements 5. Three Super ED Elements 6. Nano-GI Coating 7. Field Curvature Correction Element 8. Linear Focus Motor 9. Rounded 9-Blade Diaphragm 10. Weather-Sealed Construction