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Provenance & certification
LensSeed tag7-036Serial number171526
Rikenon
Rikenon 50mm f1.4
Pentax K50mmf/1.4
฿5,700Sold
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Condition assessed 25/1/2026
How we gradeOptical
5.0/5Mechanical
5.0/5Cosmetic
4.0/5AB
Honest disclosure
MinimalDust
NoneHaze
NoneFungus
NoneSeparation
NoneCoating marks
NoneOil on blades
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Lens heritageExact match
Rikenon 50mm f1.4
The Ricoh XR Rikenon 50mm f/1.4 is a fast manual-focus standard prime from the late 1970s for Pentax K-mount, valued for its vintage character over clinical sharpness.
The history below is for this exact model — it matches the lens you’re viewing.
Introduced
1977
Optical formula
7 elements in 6 groups
