Classic manual focus standard prime lens for Contax/Yashica mount cameras.
The Carl Zeiss Planar T* 50mm f/1.4 AEJ is the Japan-manufactured version of the Contax/Yashica standard prime, produced under licence by Kyocera for the Contax RTS, RTS II, RTS III, and related bodies. AEJ indicates Japan manufacture (J = Japan); AE = auto-exposure coupling. The Planar T* formula delivers the characteristic Zeiss high micro-contrast and well-corrected rendering.
50mm focal length, f/1.4 maximum aperture, Carl Zeiss T* (T-star) multi-coating, Contax/Yashica (C/Y) bayonet mount, Japan-manufactured (AEJ designation).
The Planar T* 50mm f/1.4 for C/Y mount is one of the most sought-after standard lenses for adapted use on modern mirrorless cameras, valued for its Zeiss T* micro-contrast and smooth rendering. The C/Y mount is readily adaptable to Sony E, Leica M, and other modern systems. The AEJ (Japan) version is generally preferred to the AEG (Germany) version for consistency.
Inspect for fungus, haze, and T* coating condition — verify the coating is unimpaired and shows its characteristic anti-reflective colour. Check aperture blades for oil. Confirm C/Y bayonet engagement. Test focus helicoid smoothness across the full range.