Yes sir I was using a circular polarizing filter. It is interesting that above 5000' the circular polarizing filter really deepens an already blue sky. The clouds also just seem to pop out, but it was a cloudless day. When viewing distant objects like mountains, they tend to go bluish also so I was a little timid in showing this set. But I did and so there they are.
Incidental to the photography, my computer machine is a 2008 Dell XPS with 4GB Ram & 750GB HD. The monitor is a Dell LCD 24". I have Adobe Photoshop Lightroom for raw files, Adobe Photoshop Elements 5 for jpegs.
I also have had later versions of photoshop, but there is just to much happy crap for me to deal with.
I've been retired since 2005, however my wife still slaves away at the Veterans Hospital in Las Vegas where is she an advanced practice nurse (care giver) in wounds and wounds that won't heal(diabetic ulcers and the like).
Thank you once again for asking!