antelope canyon 22

hi fellow photog,

would appreciate some critique of this photo and the other ones at

http://www.photo.net/photodb/folder?folder_id=119910

These were shot earlier this month. some of the photos have a dark

half - that is deliberate, I wanted to create the contrast and use the

light instead of having the usual both sides well lit kind of pix. My

only glitch was that the widest that I can go is a 28mm. technically

speaking, what all could I improve? Lighting and composition, perhaps

is what I am asking about. any other comments are greatly appreciated.

txs a ton :-)