Sigma AF 28mm F1.8 EX DG Aspherical DF Macro Specifications
Diagonal Angle of View:
Number of Aperture Blades:
straight helicoid focus mechanism with floating elements; features Dual Focus (AF w. rotating or non-rotating focus ring, MF using focus ring, focus lock (no AF nor MF))
Full Focus Throw:
LH 825-03 (bayonet mounted, flower shaped)
The lens is reported for IR capability as well as incapability (IR Forum).
*A formerly available Photozone article reported aperture control problems for EOS 30, 33, 1, 1N, 1V and D30.