Handling and Features Performance Verdict Specification Launched alongside Sony's 28mm f/2 lens for their full frame E-mount cameras, this dedicated converter provides a field of view similar to a 21mm lens and a maximum aperture of f/2.8.
Good build quality; Excellent sharpness when stopped down; Focusing seem unaffected by the converter; Automatically detected by the camera/lens; Not too expensive; Low distortion
Sharpness at maximum aperture; CA at maximum aperture; No; thread