Quote Originally Posted by super duper View Post
My husband reckons I should get the 150-500mm sigma (easier to keep up with active kids without moving, especially for sports), but I've read a lot of mixed reviews about sigma. (
I have this lens and so do a few others at AP. Also popular is the 120-400mm Sigma. I don't know if the 150-500 would be ideal for your intended purpose as it is a bit long at the wide end and only focusses to 2.2 metres. I would think the Nikon 70-300 VR would be a better choice for similar dollars. If you want to shoot the moon and things a fair distance away, the the Sigma wins hands down.

Some criticism of the 150-500 has been put at using the lens at wide open apertures over 300mm but I have no issues with the performance in that regard and I do use it like that often.