Tamron's legendary APS-C zoom — the 17-50mm f/2.8 non-VC version.
The Tamron 17-50mm f/2.8 XR Di II LD IF Aspherical is the non-VC version of Tamron's legendary APS-C standard zoom — same specification as ID 4785 for Canon. Mount not specified. The constant f/2.8 at this price point was revolutionary. XR, LD, and aspherical elements. IF internal focusing. One of the most acclaimed APS-C standard zooms.
Same outstanding quality as other mount-specific listings. Constant f/2.8 throughout. Excellent sharpness from wide open. IF prevents barrel rotation — useful for polarisers. The non-VC version is sometimes marginally sharper than the VC alternative. One of the greatest value propositions in APS-C zoom lenses at any price.
Mount not specified — verify. Available in Canon EF-S, Nikon F, Sony A, and Pentax K. Filter thread 67mm. Weight approximately 434 grams. SP-equivalent build quality. IF design. The non-VC version is sometimes preferred for marginal optical quality advantage over the VC version.
Verify mount. Very affordable. Same outstanding lens as mount-specific listings. The VC version adds practical stabilisation. The non-VC may be marginally sharper. Either version is an outstanding APS-C standard zoom. One of the best value lenses in photography history.