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Now that is a cool looking tree you found there. Both of these are very nice. Now in #1 the vignetting looks natural, but in #2 if you look at the upper corners you will see some slight vignetting that you should remove.
The tree looks great and was very happy to have come across it, was hoping to get a nice red sky as usual in this time of year for us but it wasn't to be. The vignette is distracting now that you have pointed it out.