G'day Gary,
Begging for another attempt with a wider lens straight on!
Picking up on what @Stefan Wilde observed, it does have a postcard vibe about. I mean that as a compliment. The colors are beautiful,...the saturation doesn't bother me as it does Gianluca. I generally abhor highly-saturated images, but this one doesn't feel like that to me. As you said, straight-on view with a wider lens would be interesting to see. As a critique I would offer this: It needs a bit of space on the left of the building. It's cut off there, or at least is so constricted as to seem so. Otherwise it's an interesting shot.
The difficult we do immediately, the impossible takes a little longer!
Perspective can be changed using the same tool in Affinity Photo, Photoshop etc you just drag both handles directly up the same amount.
It's a tough nut to crack, Gianluca. If you're correcting the perspective with software in post you need to be far enough away from the tall building to be able to get it all in your frame while leaving enough space around it to allow for straightening. But because most tall buildings are in cities and surrounded by other buildings getting a clear shot is nigh on impossible. It can be done though, if the circumstances are right. Your other alternatives are to accept the fact that it's a tall building and shoot up, or to frame and accentuate abstracts of the building. I have a couple of shift lenses that I use from time-to-time. One is a Canon 24mm Tilt-Shift and the other is an Olympus 35mm Shift (no tilt) lens. But most of the time I correct perspective in the post-processing phase. In the past I have relied on getting verticals right just by "eye-balling" the vertical adjustment in the Lightroom Transform module, and going with what looks best. But recently I've used the "Guided" feature, which works quite well I think.
Since the clock dial is likely round and not elliptical, I'd say yes: there's been some distortion (well the top of the tower is also likely not likely listing to starboard.
