Thank you for the compliments on the colors, when photographing with a mountain back ground you do get the optical illustion of a tilted horizons. The Vigretting as you call it isn't a lens vigrette, but a natural vigrette caused by the rarified atmosphere and lack of moisture, polution ,and dust particals that you would have at lower elevations which provide for full light diffusion. thus the beautiful sea level sunrises and sunsets and the rare spectacular sunset at high altitude. But I realize an expert photographer such as yourself has taken this all into consideration.
