Budget Sirius standard zoom for Nikon AI-S mount, affordable 28-70mm everyday lens for film shooting.
The Sirius 28-70mm f/3.5-4.5 is a vintage third-party wide-to-normal zoom for the Nikon F mount in the AI-S specification. Sirius was a budget OEM lens brand. The AI-S specification ensures compatibility with Nikon F cameras requiring automatic maximum aperture indexing. Nikon F mount.
f/3.5-4.5 variable aperture. 28-70mm zoom range (full-frame). Nikon AI-S specification. Manual focus. At approximately 300g. Nikon F mount.
Third-party Nikon AI-S specification lenses were produced by multiple Japanese OEM manufacturers for budget-conscious Nikon SLR users. The 28-70mm range provides a practical wide-to-normal zoom range for general photography on Nikon F-mount cameras.
On the used market the Sirius 28-70mm is a budget vintage Nikon zoom. Condition checks: lens elements condition, zoom ring smoothness, aperture blade condition. Nikon F mount — manual focus.