Out streched Catalina wallpaper?

[CLS7]

I have a odd problem. In the Catalina login screen, the island background looks normal (see the first picture) but when I shutdown my iMac the background looks odd in shutdown screen (see the second picture). It looks that the island is out streched in some way. Is this normal?

 

[Crash0veride]

I wouldn't say it's normal, but I get the same stretch on shutdown / restart in Catalina. (2017 iMac).

 

[ApfelKuchen]

The difference is the two views are shot with lenses of different focal lengths - purely a change of photographic perspective.

More interesting to me is that I don't get the wide-angle view on the Mac I'm currently using. Maybe it has to do with having a non-Retina display (27" late 2013 iMac)? I guess I'll check this out on my 27" Retina 5K 2017 iMac when I have the chance.