I got this lightweight zoom in a bundle with an OM-10 camera. I took it for a first outing today and was pleasantly suprised. It is light to carry and easy to focus. The aperture ring doesn't shift easily or click nicely, but that could be my copy. Sharp enough and purple fringing /chromatic aberation seems quite well controlled for a cheap zoom. Can get glowy at times. I kept it at full 210mm zoom stopped down one or two.