Before refined color work or retouching, almost every photograph needs a few basic corrections: a better crop, a level horizon, removal of lens problems and a sensible overall brightness and contrast. These first steps often make the biggest visible difference with the least effort. This lesson explains the tools and the order for these basic corrections, so every image starts from a clean, solid foundation.
The foundation steps
Basic corrections are global adjustments that fix the frame, geometry and overall exposure of an image. They come early in the RAW development order from RAW development workflow: profile and lens corrections, crop and straighten, then white balance and tone. This lesson covers geometry and basic tone; white balance is covered in white balance and color correction.
Lens corrections
- Enable profile corrections to remove distortion and vignetting for your lens, as introduced in lens distortion.
- Remove chromatic aberration to clean colored fringes along high-contrast edges, as in vignetting, chromatic aberration and optical limitations.
- Do this first, because correcting distortion changes the edges and may affect your crop.
Straightening
| Tool | How it works | Best for |
|---|---|---|
| Straighten (level) line | Draw along something that should be horizontal or vertical | Horizons, building edges |
| Angle slider | Rotate by small amounts | Fine adjustments |
| Auto straighten | Software detects lines automatically | Quick fixes; check the result |
| Perspective correction | Fixes converging verticals | Architecture, covered in perspective and geometry correction |
Tip:Straighten along a true reference: the sea horizon, not a sloping hillside. Tilted horizons are one of the most common and most noticeable mistakes.
Cropping in practice
Why and how to crop for composition was covered in cropping and composition after capture. In editing, the practical points are:
- Choose an aspect ratio for the final use, such as 3:2, 4:5 for portrait social posts, 1:1 or 16:9, as in aspect ratio and final framing.
- Use overlays such as a thirds grid to place key elements.
- Remember the resolution cost: heavy crops reduce pixels and may limit print size, as in resolution, pixels and real-world detail.
- Crops are non-destructive in RAW editors; you can change them later or make several versions.
Basic exposure and tone
| Control | What it affects | Typical use |
|---|---|---|
| Exposure | Overall brightness, especially midtones | Correct a too-dark or too-bright image |
| Contrast | Difference between lights and darks | Add punch or soften |
| Highlights | Bright areas | Recover sky and bright detail |
| Shadows | Dark areas | Reveal shadow detail |
| Whites | The brightest tones (white point) | Set the brightest point just before clipping |
| Blacks | The darkest tones (black point) | Set the deepest point just before or slightly into clipping |
Many editors can show clipping previews while you move the whites and blacks sliders (often by holding a key). Use them with the histogram from histogram and exposure evaluation to set the tonal range precisely. More detailed control comes with levels and tonal adjustment and curves.
Warning:Large shadow and highlight recoveries can look flat or create halos. Use them gently and restore some contrast afterwards.
A basic corrections routine
- Apply lens profile and chromatic aberration corrections.
- Straighten and crop for the intended use.
- Set white balance (next lessons).
- Adjust exposure so the main subject looks right.
- Recover highlights and open shadows as needed.
- Set whites and blacks using clipping previews.
- Adjust contrast to taste.
Common mistakes
- Straightening along a sloping line: the horizon still looks tilted.
- Cropping too tightly: not enough resolution or room for different formats.
- Extreme shadow and highlight sliders: flat, unnatural images.
- Skipping lens corrections: distorted lines and colored fringes.
How professionals start an edit
Professionals often apply lens corrections and basic settings automatically on import with presets, then straighten, crop and set basic tone for each image in a few quick, consistent steps. These foundations take seconds but make every later adjustment easier and more predictable.
Practical examples
A tilted seascape
- Situation
- The horizon slopes slightly down to the right.
- What to do
- You use the straighten tool along the sea horizon and crop to 3:2.
- Why it works
- The sea horizon is a true horizontal reference.
- Result
- A calm, level seascape.
A dark backlit portrait
- Situation
- The face is dark and the sky slightly clipped.
- What to do
- You raise exposure, lower highlights, open shadows gently and set whites and blacks with clipping previews.
- Why it works
- Basic tone controls balance subject and background.
- Result
- A natural portrait with detail in both face and sky.
Key points
- Basic corrections fix geometry and overall exposure before detailed edits.
- Apply lens profile and chromatic aberration corrections first.
- Straighten along true references; crop for the final use and remember resolution.
- Use exposure, contrast, highlights, shadows, whites and blacks with clipping previews.
- Use strong recovery gently to avoid flat or haloed results.
Frequently asked questions
What are the first edits to make on a photo?
How do I straighten a horizon?
What do the whites and blacks sliders do?
Does cropping reduce quality?
Conclusion
Basic corrections build the foundation of every edit: correct the lens, straighten and crop for purpose, and set exposure and tonal range carefully. Next, you will learn precise tonal control with levels.
Finished reading? Track your progress through Editing and retouching.