A case of Balance

Well folks,with all the oohs and aahs for the quality of the images I was getting from my Sigma 150-500 O/S lens.Today it ''bit the dust''! The technology died!The A/F failed,so off to the repair shop.And of course it is out of warranty by 6 months?
Luckily I still have it's predecessor.The Sigma 170-500 f5-6.3 APO lens which I quickly attached to my D800 To get this shot just as the Sun was disappearing from the garden! Loved the colour of the Ceder shed behind! This young woody was really having trouble getting to grips with his perch. Spec. 1/400 sec @ f6.3 ISO 2800 using DX mode + 750