Certificate of Provenance & Condition
Authenticated by LensSeed
Sigma
Sigma : 28 mm, f2.8
Authenticated
Condition assessment
ABWeighted across
three axes
three axes
Optical5/5
Mechanical5/5
Cosmetic4/5
Certificate №LS-A188EE2BF662
Serial4277788
MountOlympus OM
Focal length28mm
Max aperturef/2.8
Issued22 June 2026
Honest defect disclosure
DustMinimal
HazeNone
FungusNone
SeparationNone
Coating marksNone
Oil on bladesNone
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