{"id":35612,"date":"2022-12-04T22:19:20","date_gmt":"2022-12-04T21:19:20","guid":{"rendered":"https:\/\/phillipreeve.net\/blog\/?p=35612"},"modified":"2024-04-21T11:14:53","modified_gmt":"2024-04-21T10:14:53","slug":"how-to-correcting-color-cast-in-lightroom","status":"publish","type":"post","link":"https:\/\/phillipreeve.net\/blog\/how-to-correcting-color-cast-in-lightroom\/","title":{"rendered":"How to: Correcting Color Cast in Lightroom"},"content":{"rendered":"

Introduction<\/h2>\n
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Color cast of Funleader 18mm 8.0 on Leica M10<\/figcaption><\/figure>\n

Leica users where the first to discover that their old compact wide angle lenses with the rear element close to the film\/sensor plane have some color cast issues on digital cameras. This is an issue that cannot fully be solved by the optical design – at least when following the quest to create compact lenses. But there is something we can do: fix this in post. How to do it? I will show you in this article.<\/p>\n

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What is color cast?<\/h2>\n

Some wide angle lenses will create a color cast in the corners and sometimes border regions of the frame when used on digital cameras. This mainly affects compact (rangefinder) wide angle lenses with their rear element very close to the sensor. That short distance between rear element and sensor means that light will hit the sensor at a very shallow angle which creates some problems like additional vignetting and also sometimes a color cast.<\/p>\n

\"17mm
Leica M10 | MS-Optics 17mm 4.5 Perar | f\/8.0<\/figcaption><\/figure>\n

The same lens can show different color cast on different cameras. The later BSI sensor Sony cameras mainly show a slight symmetrical green color cast in the corners. The same lens can show a nasty asymmetrical magenta color cast on the Leica M10 though. The situation can get even worse when using a camera with older sensor technology like a Sony A7r, a Leica M9 or even APS-C cameras like the Sony Nex 7 or Leica M8 – these cameras are generally known to have the most severe issues with color cast.<\/p>\n