Here’s a simple trick for landscape photos: when shooting a landscape photo that needs a hard edge graduated ND filter, you can use your hand. Yes your hand! It’s a technique I’ve been using in my own work recently.
I haven’t purchased a graduated ND filter because I’ve relied on Lightroom and Photoshop to even out the exposure of skies when I need too. But I am liking the result I’m getting by using my hand.