Like many photographers I really like from time to time to shoot long exposures. Some years ago I bought a set of LEE filters. I have the LEE Littlestopper, the Bigstopper and I also recently added the Superstopper to my collection. The LEE filters are great, but it’s difficult to get the correct colors. The filters tends to have a blue’ish colorcast that is very hard to correct. The result is that some of the images can look a bit “flat”.
I have tried several ways to correct this problem using graycards, the passport colorchecker etc. etc. without getting the result I was looking for. I also tried a method using a RGB curve adjustment, but still no luck. I was actually looking for a simple way to correct the colorcast. Recently I again did a search for possible ways to correct the problem. I came across a video from Peter Zelinka explaning a method that works really good.
The whole idea is to lock the WB and take a picture against a white wall. This image will be used as the reference image. Next is to add the filters one by one, calculate shutterspeed and use the same WB and settings as the reference image. The result will show the colorcast for the specific filter.
Next step is to take the images into camera raw and adjust WB and tint to get the images taken with filters as close to the reference filter as possible. Adjust the two settings until you are happy with the result. You will then get the correct values for how much you will need to add or subtract on WB and Tint
For my Littlestopper I need to add +950 Kelvin and subtract -3 on the tint. For my Bigstopper i need to add +2100 Kelvin, and add + 3 to he tint. I guess that this values will not be the same depending on the batch from LEE filters, so you will have to do the same calibration for your filters.
So, let’s take a look at the result. Below is the image with no adjustments:
And the corrected one: