Lens Correction Tool Pro

Linskorrigering / LCC / Generell objektivprofil / Vinjettering

Use the Lens Correction Tool Tab to address a number of unwanted issues commonly associated with lens distortion. (Compatible with RAW files only).

Introduction

The Lens Tool Tab has three default tools: Lens Correction, LCC and Vignetting.

The Lens Correction tool includes predefined corrections for many popular lenses from major lens manufacturers. Corrections include distortion, chromatic aberration, sharpness and light falloff.

The Generic or Generic Pincushion Distortion profiles available in the Lens Correction tool address the most detrimental issues related to any simple spherical lens. Complex distortion however, can only be fully corrected with specific preset profiles. Where possible the lens type will be automatically selected in the Profile menu. A selection of the most suitable lens correction profiles can be found under the Recommended Lenses heading or you can manually select a lens correction profile from the available list.

Create a LCC (Lens Cast Calibration) profile if a specific lens model is not supported in the Lens Correction tool. Vignetting can be used to either darken or brighten the edges and corners of an image.

Video: Lens correction

Learn about lens correction in this video tutorial. (Click on the image to the right). In Capture One Pro 7, your images are automatically adjusted for lens failings using bespoke profiles for popular medium format and DSLR lenses. Fix classic optical issues like distortion, light falloff and chromatic abberation quickly and easily.

Apply a Lens Profile

  1. Go to the Lens Tool Tab and select the Lens Correction tool.
  2. Select an image from the browser and choose a specific lens from the Profile drop down menu. (A selection of the most suitable lens correction profiles can be found under the Recommended Lenses heading or select one from the available list).
  3. Once a lens is selected check mark the Chromatic Aberration and Purple Fringing boxes to remove the lens effects. Next to the Chromatic Aberration check box, select Analyze* for a better correction that is specific to that image.

*Selected lenses will analyze Chromatic Aberration automatically.  

Apply a Generic Lens Profile

  1. Go to the Lens Tool Tab and select the Lens Correction tool. 
  2. Select an image from the browser and choose a generic lens option from the Profile drop down menu.  (All sliders in the tool are reset; there no default setting for a generic lens).
  3. Check mark the option boxes and adjust the Sliders to the desired settings. (A better correction can be achieved using an LCC profile).

Lens Correction – Movement

  1. If you are using a lens or camera system that can have movements applied, go to the Movement tab in the Lens Correction tool.
  2. If the Focal Length and Aperture can be detected, the values will automatically be shown in the corresponding fields. Otherwise amnaully enter the information.
  3. Enter the shift data for the x and y axis. Chaning the shift parameters will have a positive benefit on the distortion and light falloff corrections in particular.

LCC Test Shot

Create a LCC (Lens Cast Calibration) profile if a specific lens model is not supported in the Lens Correction tool.

Either photograph a LCC (Lens Cast Calibration plate) to create a test shot for an up-to-date LCC profile of a particular lens. To get an exact profile and optimal correction, the LCC test shot should be created with the same lens and shutter setting as the intended corrected images. Tilt and Shift adjustments on a camera must also match for best results.

Alternatively, use a similar LCC test shot if you keep a library of previously captured LCC images. (Phase One does not recommend selecting the Dust Removal check box with this generic approach to lens correction).

Video: LCC tool

Learn about the LCC tool in this video tutorial. (Click on the image to the right). Handling LCC profiles with Capture One Pro 7 is easier with the new specific LCC Tool. You can create LCC profiles for several images at once, and apply them to more images at a time.

Create and Apply a LCC Profile

  1. Import and select the LCC image from the browser. (I.e. the image captured with the white Lens Cast Calibration plate).
  2. Go to the Lens Tool Tab. Select the Lens Correction tool and  press the Create LCC buttton
  3. Check mark the Wide Angle Lens with Movements box if you are using a technical camera with a lens wide angle lens and some degree of movement.
  4. Check the Include Dust Removal Information to create a map to automatically remove dust.
  5. Press Create.
  6. Capture One will now analyze the image and create the LCC profile. (When completed, the check box Color Cast is selected. The color differences across the image should now be even).
  7. The thumbnail will be labelled with LCC to help you keep track of your captures.
  8. To Apply the LCC to one or more images (that were captured with the same camera) simply select them both in the
    thumbnail browser, right click, and choose Apply LCC.

Tip: Right click on a thumbnail in the browser and select Create LCC...

Save a LCC as a Preset

  1. Click on the Manage Preset icon at the top of the LCC tool.
  2. Select Save User Preset... from the drop down menu.
  3. A dialog box will open. Name and save the Preset.

Import LCCs

A LCC library from Capture One 6 can be imported and converted into presets in version 7.

  1. Go to the Lens Tool Tab and open the LCC tool.
  2. Click on the action menu icon and select Import LCC library from Capture One 6...
  3. A dialog box will appear. Press OK.

LCC Options

  1. Go to the Lens Tool Tab and open the LCC tool.
  2. Click on the action menu icon and select Apply LCC Options...
  3. Check mark the Uniform Light option box and adjust the slider as desired.
  4. Press OK. Now when you apply the LCC, this new Uniform Light setting will override the existing setting.

Vignetting

Vignetting is a controlled exposure adjustment that will either darken or brighten the edges and corners of an image. The edges and corners will be appear brighter when the EV value is added and darker when it is reduced.

  1. Go to the Lens Tool Tab and select the Vignetting tool.
  2. Select an image from the browser and choose the desired option from the Method drop down menu.
  3. Adjust the Amount slider to the right to lighten or the left to darken the edges and corners of an image.  

Note: Vignetting will be effected by any color tone that is applied to an image including the styles Sepia and Blue tone.

Learn-More

Workflow Tips:

  • Apply LCCs in bulk by selecting a batch of images that include LCCs. You can also analyze your LCCs in bulk.
  • If you have multiple LCCs, Capture One detects whether an LCC should be applied to images following the LCC or before it.
  • If you are a photographer who creates an LCC for every frame, you no longer need to add an LCC to your library before applying it.

Go to the Tips and Tutorials sections for expert advice including how to use the LCC Calibration feature to create beautiful HDR images in Capture One 6. There is also more information on Vignetting and a tutorial on how to use the Lens tool to help achieve uniform light for fine art reproduction and how to create Presets to deal with Chromatic Aberration (Capture One 6).

Light Falloff

Light falloff arises because an image is exposed more at the center of the frame than at the corners. The distance from the lens to the backplane is longer at the edges than it is at the center and, therefore, less light can get through the lens at oblique angles. This effect is most common with wide-angle lenses that are used with a wide-open aperture. If you have a profile for your lens, set the amount to 100% to get a completely flat and even looking image. Otherwise, use a generic profile and manually set the desired amount with care.

Chromatic Aberration and Purple Fringing

Chromatic Aberration (CA) occurs because light of different wavelengths takes different paths through the lens that may not be in focus on the backplane. As most light is a mix of several wavelengths, the lens will focus the colors differently and create color fringes on edges of high contrast areas.

Since CA results from colors that have shifted, a white or light color on a dark background will have colors on either side. The most common manifestations of the error are seen as red/cyan and blue/yellow but others are possible. One of the more unsightly is green/purple but this should not be confused with Purple Fringing.

Brass, chrome and other metallic products often give rise to extreme contrast that can generate Purple Fringing. Purple Fringing (PF) is, like Chromatic Aberration, an artifact that occurs because a lens interacts differently with light of varying wavelengths. Unlike Chromatic Aberration, Purple Fringing will not usually show fringes of different colors. PF is mostly visible on the edges of very high contrast image areas, such as metallic products or branches on a tree against a bright sky.

Purple Fringing is often seen on images that also show Chromatic Aberration. Wide-angle lenses are more likely to show this artifact.

Sharpness Falloff used for Soft Corners

Soft corners can occur for many reasons and commonly transpire when a wide-angle lens is used. Soft corners are often seen as a desired retro-focus effect. However, Capture One can help correct this effect if it is unwanted with the Sharpness Falloff tool. Set your lens profile to 100% to fully correct this issue (if you have one). Otherwise, experiment to get an appropriate setting.