Maybe this trick is common knowledge but, it's new to me. I think it's pretty rad and thought I'd share for anybody else that may not know about it. An easy way to flatten that curved horizon in panorama shots. I'd like to preface this by saying that I hate this shot and gave up on it part way through but, it illustrates the issue.. so yeah.... Not much to it. It's the adaptive wide-angle filter in PhotoShop. Once the filter is selected there is an option for panorama and it works great with only small amount of image loss. Below is a screenshot and a quick before and after example.