I took a bunch of landscape shots last weekend but didn't realize my camera was tilted when I was shooting. Now I've got dozens of photos with the water and trees all slanted. Is there a quick way to fix this in editing software without losing too much of the image?
Don't just crop the image heavily to hide the tilt - you'll lose way too much of your landscape and end up with a tiny, cramped photo. Most editing software has a straighten or rotate tool that's specifically designed for this, and it's usually faster than trying to manually fix it layer by layer.
Pretty much every tool worth using has a straightening feature. In Lightroom, there's a Crop Overlay tool with a rotate slider, or you can use the Guided Upright feature if the horizon is really messed up. Photoshop has a Rotate tool - just select it, draw a line along where your horizon should be level, and it'll auto-correct the angle. Even free options like GIMP or online editors have rotation sliders. The key is that after you straighten, you'll have empty triangular corners that need filling. That's where it gets a bit tedious: you can either crop tighter to eliminate those corners (which is usually fine for landscapes), or use content-aware fill to blend the edges if you want to keep more of the frame.
The real timesaver for your situation is batch processing. If all your photos were shot at roughly the same tilt angle, you can apply one straightening adjustment to the first image, then copy that rotation value and paste it across the whole batch in Lightroom or similar software. Saves you from doing it 40+ times individually. Just be aware that if you were tilting the camera in different directions across your shots, you'll need to straighten them individually or in smaller groups.
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