This is a photo of the back of the red bricked house in other zoom example photo.at about 1.00 o`clock.To my eyes this is a very clear photo. and when one thinks that it was taken with an equivalent zoom of about 660mm with a max speed of f3.7.Consider how much such a lens would cost to fit on front of a digital slr!!.I dread to think of the prohibitive cost of such a lens that would capture this excellent detail,plus of course the size and weight.It surely must bring to the mind of the digicam knockers that this is exceptional value coupled with excellent quality for such a long zoom.I used to lug around a Nikon D70 18-70 zoom Sigma 18-200 digi zoom.No longer of course,this does it all for me without breaking my back.