I am trying to figure out why on some pictures I am getting a nice blue sky in one shot and not on the next. Here is what I am doing, please give me your thoughts.
I am shooting a Canon 30D with a 16-35mm, 2.8 lens and a Hoya Pro Digital Protector filter on it.
Blue sky picture was 1/250 sec., f/8.0, IS0 100, Flash DID NOT fire.
No-blue sky picture was at 1/250 sec., f/6.3, ISO 100, Flash DID fire.
This is one example, but it seems each time I used the flash for fill-light of my subjects on the bright sunny day, I lost my blue sky and blue water. What is causing the blue sky to go away when I use the flash? Or is it something else?