Nice photos Gerard
Same issue I was having yesterday with my photos.
the White balance probably needs adjusting to compensate for the lighting.
Here is a good article on the subject http://www.cambridgeincolour.com/tutori ... alance.htm
I went on Saturday afternoon and was very impressed. It was the first bonsai exhibition I've been to and I can see myself attending a lot more in the future. Really good to see natives as bonsai.
If you don't mind amateur photography, I have most of the trees in this album.