Picture is definitely take with a 'long' telephoto making it look as though the DHL aircraft is almost touching the JAL. Anyone who's seen the photo taken at San Francisco with the 747 and 757 will know what I mean.
That photographer should go to Craven Cottage when Heathrow are on westerlies; you get a much better view with the helicopters on H3/H4 mixing it with 747's on 'collision courses' and they're almost 2000ft apart !