Too good to be true? Hm. I picked that shot as the best from a sequence of 19 (!) I also considered masking the aircraft and using a little noise reduction on the sky, but decided against it as it looked too artificial. If you're really dubious, I could post a pic from earlier or later in the sequence....(which would doubtless be rejected as a dupe!)
Actually, I'm just trying to imaging what a nightmare it would be to photograph a model to look like that. For a start, how would I get the wings to flex like that? (the subject of this thread, after all!)
For those who are interested in the wing bending rather than the authenticity of the pic, the 747 was in a lefthand turn at the time. This obviously adds a component of centifugal force to the weight of the aircraft, thereby increasing the load on the wings and increasing the amount of flex.