I was out to Rocky Mountain National Park last year and I was taking a picture of a mountain lake at sunrise and a guy was using one of these rectangle filters. He said it helps with the lighter skyline and the darker areas of the mountains. My question is, can I just use Photoshop like I have been doing to make the adjustments or will I get better results using this filter. I am heading back out there in a month and I was thinking about getting one but I don't want to spend the cash if I don't really need to.


