Sigma AF 50mm F2.8 EX Macro Specifications
2001 issue (Err 99), upgradeable up to Serial #3...
Diagonal Angle of View:
Number of Aperture Blades:
recessed front lens + LH 550-01 (round shape, thread mounted)
The lens features a focus limiter (full, 0.18m - 0.24m (1:1 - 1:2)) and is reported to be IR capable (IR Forum). Quantaray sold a rebadge of it (compare