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 for Canon EF is a budget telephoto zoom with LD elements and macro close-focus. One of the most basic telephoto zoom options available. The LD elements provide better chromatic correction than non-LD alternatives. The Macro designation allows closer focusing at telephoto for casual close-up work.
Optical performance is basic. LD elements improve CA over budget alternatives. Centre sharpness is acceptable. Macro mode at telephoto provides approximately 1:2 magnification. No stabilisation. Adequate for casual daylight telephoto. The VC USD version is dramatically better with stabilisation and quiet motor.
Canon EF mount. Filter thread is 62mm. Weight is approximately 435 grams. Build quality is basic. No IS. The VC USD version is strongly preferred. Only distinguishing features over the cheapest alternatives are the LD elements and macro mode. Multiple versions exist.
Extremely cheap. Not recommended when the VC USD version exists at modest additional cost. A last-resort budget telephoto. The LD elements are the only justification over the cheapest alternatives.