13 mile bike ride to work , 5 mile run on my lunch break , 13 mile bike ride home . Plus 14 , 000 steps during work . <| sep |> Probably just easier to make . If you check out the lens designcontentuploads 201610 Nikon 70200 mmf 2 . 8 EFLEDVRLensConstruction . png it appears as though that group behind the flourite element is the one that moves when you zoom . Having the zoom ring closer the moving group helps simplify the design . I ' ve used the Tamron before and it is similar in handling . You ' ll only really notice with sports where I find myself going between 70 and 200 very quickly . I ' ve found Canon ' s 70200 mm ' s are better with handling though . The zoom ring is further back which makes it a bit easier to hold and zoom , but the zoom ring being in front shouldn ' t be a deal breaker . I probably won ' t be upgrading though since the cost is a bit too high and my work isn ' t demanding enough to justify buying one .