We really like these Raspberry Pi HQ Camera lenses from ArduCam.  Available in and 130 degree ultra wide angle. 

Lens Specification:

• Model No: M23280H13
• Arducam Part # LN032
• Optical Format: 1/2.3”
• Focal Length: 2.8mm
• Aperture: F2.4
• Field of View (FOV): 130° (H) on Raspberry Pi High Quality Camera, 75°(H) on Raspberry Pi V1/V2 Camera
• Mount: M12 mount
• Back Focal Length: 5.65mm
• MOD: 0.2m
• Dimension: Φ18×17.9mm
• Weight: 8g

Package Includes:

• 1x 1/2.3″ M12 130 degree wide angle camera Lens
• 1x M12 lens adapter for HQ Camera