Tamron 70-300mm F/4.5-6.3 Di III RXD

Reviewers find it sharp in the centre at 70-200mm, with softer corners throughout and a noticeable drop at 300mm wide open that improves at f/8. Contrast and colour are good for the price. The RXD motor is quiet and accurate, but slower than VXD or Sony's linear motors when tracking erratic subjects.

The overall verdict is that it is a strong budget option that delivers more than its price suggests. The lack of stabilisation, the 7-blade aperture and the minimal controls are the expected compromises.

Owners like the low weight and price and say it is easy to take on trips where a larger telephoto would stay home. Many use it as a first wildlife lens before moving up.

Complaints focus on 300mm softness, AF hunting on small birds or against busy backgrounds, the lack of VC for older bodies, and having no AF/MF switch. The 0.8m minimum focus at 70mm limits close-up use.