Tamron's budget telephoto for Canon — the AF 75-300mm LD Macro with basic telephoto reach.
The Tamron AF 75-300mm f/4-5.6 LD Macro is a budget telephoto zoom from Tamron for Canon EF-mount bodies. The LD designation indicates low-dispersion glass elements for reduced chromatic aberration, and the 'Macro' label refers to enhanced close-focus capability at the 300mm end rather than true macro reproduction.
The lens spans 75–300mm with a variable f/4–5.6 aperture, LD glass for colour correction, Canon EF autofocus coupling, and a close-focus 'Macro' mode at the long end. It is a lightweight, entry-level telephoto zoom suited to casual wildlife, sports, and travel photography.
The 'Macro' designation is a marketing term for its closer-than-standard minimum focus distance at 300mm, providing 1:3.9 maximum reproduction — not 1:1 macro. LD glass helps control chromatic fringing in a zoom spanning this focal length range. It serves as a cost-effective reach extension for Canon EF-mount users.
Check autofocus speed and accuracy, as budget Tamron zooms of this era use relatively slow motors. Inspect the zoom ring for smooth travel and check for barrel creep when the lens is held vertically. Examine internal elements for dust, haze, or fungal growth. Test the close-focus mode at 300mm to confirm its operation.