Certificate of Provenance & Condition
Authenticated by LensSeed
Cosina (Cosinon)
Cosina (Cosinon) : 50 mm, f2
Authenticated
Condition assessment
BWeighted across
three axes
three axes
Optical4/5
Mechanical4/5
Cosmetic4/5
Certificate №LS-1062001F05CD
Serial91308787
MountPentax K
Focal length50mm
Max aperturef/2
Issued22 June 2026
Honest defect disclosure
DustMinimal
HazeNone
FungusNone
SeparationNone
Coating marksNone
Oil on bladesNone
Scan to verifyLS-1062001F05CDlensseed.com/cert
LensSeed
LensSeed · 20+ Year of Experience