We really like these Raspberry Pi HQ Camera lenses from ArduCam.  Available in 90 degree wide angle and . 

Lens Specification:

• ArduCam Part # LN033
• Model No: M23356H09
• Optical Format: 1/2.3”
• Focal Length: 3.56mm
• Aperture: F2.5
• Field of View (FOV): 90° (H) on Raspberry Pi High Quality Camera, 55°(H) on Raspberry Pi V1/V2 Camera
• Mount: M12 mount
• Back Focal Length: 5.92mm
• MOD: 0.2m
• Dimension: Φ14×16.3mm
• Weight: 7g

Package Includes:

• 1pcs 1/2.3″ M12 90 degree wide angle camera Lens
• 1pcs M12 lens adapter