Panasonic Lumix S 28-200mm f4-7.1 Macro OIS Lens (£674 after £125 cashback)

There are a few Panasonic deals at the moment. This is a good lens for beginners. It has a wide focal length range.
Design & Weight: Worlds smallest and lightest full-frame 7x zoom lens, weighing just 413g (438g with hood) and measuring 93.4mm 77.3mm.
Macro Capability: 0.14m closest focusing distance at 28mm, providing a 0.5x magnification (1:2 half-life-size macro.
Built-in Optical Image Stabilization (O.I.S.) that offers up to 6.5 stops of stabilization when paired with Dual I.S. 2 compatible camera bodies.
The lens is dust, splash and freeze resistant, down to -10C, and the front element has a Fluorine coating to repel dust, grease and water.
If you like looking at graphs to see lens quality then here is a review – ephotozine.com/art878
Compare it to the Lumix 20-60mm – ephotozine.com/artnce
Compare it to the Sigma 20-200mm f/3.5-6.3 DG Contemporary – ephotozine.com/art502
When looking at these graphs of lens sharpness note that higher is better. Lens sharpness varies with focal length and aperture. Lenses are usually sharpest at the centre but less shapr at the edge.