You can try focusing with the middle point only and recomposing . The middle is the most sensitive and accurate for focusing , but it might not get the low level reach you ' re looking for . Otherwise , you ' ll also have to consider that with really shallow depth of field , this method does slightly shift the focal plane so you might want to step down a bit for the DOF wiggle room . As for sellingbuying lenses , The 70200 f 2 . 8 VRII would set you back around $ 2 k CAD . You can get a new 70200 f 4 for about $ 1 k last I checked . so I ' d assume a used copy would go for around $ 700 . <| sep |> We all know what you really mean though and so do you . <| sep |> Ok onside kick . Here we go . <| sep |> i got it after 8 hours , so about 6070 runs . It was a god roll too , so worth .