Photos where the horizon is not straight always look something. It is possible to fix the problem in Photoshop (or another image editor such as Lightroom, Pixelmator, or Capture One). However, it is better to bring it as close as possible to the spot. To take photos with a straight horizon.
Using a Tripod and Stand
Holding your camera in your hand will almost always bring down your horizons. It is almost impossible to keep the camera on the same level, to play with the settings and to press the shutter button.
The best way to get a stable, even camera is to use a tripod. Many tripod plates – such as the Vanguard Alta Pro – the most popular tripod from ReviewGeek – are equipped with a small spirit level, so you can align your camera even on uneven terrain. If your tripod plate is not supplied with a spirit level, you can choose one that will be plugged into the hot shoe of your camera for a few euros.
Your camera may also have an integrated digital spirit level or virtual horizon. The entry-level cameras from Canon and Nikon do not have one, the middle cameras, however, read the manual in your camera to see if there is a camera, and if so, how to activate it.
If you need to pick up
If you do not have the ability to use a tripod and want to keep your horizons As straight forward as possible, things are a little trickier. If your camera has a digital level, use it. They are much more approachable and easier to read than a spirit level.
Another option is to choose a straight line in the viewfinder – I like to use two layers – autofocus markers – and align them with the horizon. The longer the line, the more accurate you can do it. If you are in a row, make your camera as tight as possible and press the shutter button. Make sure you use a slow shutter speed to avoid camera shake.
Avoid Wide Angle Lenses
Much of the uneven horizons in landscape photographs is optical distortion. Wide-angle lenses look like curved lines due to barrel distortions. If the horizon in the center of the image is not dead, any photo taken with a lens larger than 24mm on a full-frame sensor will likely show some degree of barrel distortion.
RELATED: What is Optical Distortion in Photography?
Although you can fix something using the lens profiles built into Lightroom, Photoshop, and other RAW image processors, you will not be able to eliminate them distortion, since this is the sensor recorded original data.
If you need a straight line of horizons for any reason, you should avoid using wide-angle lenses. Each lens is unique and of better quality – readers, more expensive – Lenses have less distortion. As a guideline, however, I would say that a wider lens than a 24mm lens (or a 35mm lens with zoom lens) minimizes barrel distortion.  Fix in Photoshop
Even if you want to focus your horizons on-site as accurately as possible, it's normal that you need to fix something in Photoshop. This is one of the first steps in my landscape editing routine. The main reason for doing as much as possible with the camera is that you lose as little data as possible and do not have to cut out any important part of the composition.
Every good image-editing app has an alignment tool, usually as part of the clipping tool. We have complete instructions for use in Photoshop, but probably also for your image editor of your choice.
Realizing if they do not matter
For everything I've talked about Just horizons, it's important to remember that there are times when they do not matter. When such a situation occurs, when you take a portrait with a large aperture, the horizon line becomes only an indistinct blurring.
Another interesting is when there is no horizontal horizon in the picture The things we take off the horizon, such as lampposts or buildings, are crooked. Look at the sloping mountains in the picture above. Seriously, that's a "flat" horizon in this photo, but nothing I can do will look anything but crooked just because there's always a strange angle or an odd line in the mountains that distracts people ,