There is an Aviation Photography
forum which is where this really should have been posted. Most of the photographers are there and they love to shred guys who call pictures like this fakes.
It is a good picture and I'd be proud to have taken it, but the subjects (sky and airplane) are very ordinary. Now why would someone go to all the trouble in Photoshop to fake a picture when the result is nothing but an airplane and a sky. No! Faked photos show us airplanes flying down the aisles at Walmart or give us open-cockpit jumbo jets and things like that.
Guys, if something in the appearance of this picture surprises you it is only because you lack experience in looking at airplanes at high altitude from other planes at high altitude. The occasional two-second glimpse from passenger cabin windows does not qualify. The picture looks dead-on what I would expect and I believe that those of us who have our altimeters up to 29.92 (or even know what I mean by that) agree - it looks just about right.
If I had to guess I'd say the photographer was at FL370 in RVSM airspace, saw a target on the TCAS that was a thousand feet lower and converging. He grabbed his camera and pointed. I'd guess it was a good camera, probably an SLR and maybe a 120-200mm or so telephoto also of good quality.
Someone even posted that it looked like the plane was going straight down! Well the plane is passing under our POV. To go under us it has to be below us. So at some point between the horizon and passing under us it has to be traversing down
in our field of view. Test this! Stand where a plane will fly over your head. See if it doesn't fly UP
in your field of view even if it is not climbing. A mountain on the horizon does not look as "high" as it does when it is right next to you. Did you ever notice that?
And lastly, this site really does not like photographers uploading fakes. Any of the regular contributors are well aware of that and they would just not do it.
Happiness is not seeing another trite Ste. Maarten photo all week long.