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I'd like to see the original, if you don't mind posting it.
Welcome. The second shot is better with the horizon "straightened" although in the Grand Canyon, there is no straight horizon. There seems to be a blue line along the top of the branch though that is a bit distracting to me, but I like the overall composition. 600 shots is all you took at the GC? That shows a lot of self discipline... :-)
Thanks for posting the original, it shows what an improvement was made in the post processing photo. It made a big improvement.
Most welcome, I still have SOOOOOOOOOO much to learn about post processing.
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