# Longitudinal aberration

Site: Chromatic Aberration
URL:  https://3dcms.info/buckrackley/sites/chromatic-aberration/3d/longitudinal
Section: Page cluster

## Page content

### Longitudinal: color by depth

Longitudinal aberration puts each color's focus at a different distance, so it shows up everywhere including dead center. In front of focus the fringe runs purple, behind it green. This is the purple fringing around bright highlights.

- Back to start <https://3dcms.info/buckrackley/sites/chromatic-aberration/3d/start>
- Dispersion <https://3dcms.info/buckrackley/sites/chromatic-aberration/3d/dispersion>
- Lateral fringing <https://3dcms.info/buckrackley/sites/chromatic-aberration/3d/lateral>
- The fix <https://3dcms.info/buckrackley/sites/chromatic-aberration/3d/the-fix>
### Focus moves with color

in front of focus: purple rim

at focus: clean

behind focus: green rim

Same bright highlight at three depths. The rim flips from purple to green as you cross the focus.


## All pages
- Chromatic Aberration: Page <https://3dcms.info/buckrackley/sites/chromatic-aberration/3d/start>
- Why it happens: dispersion: Page <https://3dcms.info/buckrackley/sites/chromatic-aberration/3d/dispersion>
- Lateral aberration: Page <https://3dcms.info/buckrackley/sites/chromatic-aberration/3d/lateral>
- Longitudinal aberration: Page <https://3dcms.info/buckrackley/sites/chromatic-aberration/3d/longitudinal>
- The fix: the achromatic doublet: Page <https://3dcms.info/buckrackley/sites/chromatic-aberration/3d/the-fix>

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