As a longtime amateur photographer, I know the problems with long focal lengths. My earlier telephoto zoom at the KB-SLR had a longest focal length of 210 mm. Handheld shots arrive only at the 500th or shorter. Everything else was blurred.
And now an objective in the KB-85-300 mm focal length. Due to the VR technology work now even pictures with the longest focal length of the hand with a remarkable sharpness. I never would have expected. Kudos to the art and thank you for such an excellent lens.