As you shot with the Schneider 55, a traditional LCC would not be needed. LCC's are for Tech lenses center or shifted to correct for color cast towards the edges of the frames and at times center since the rearmost lens element is so close to the sensor. LCC's can also help correct tiling, (centerfolding) but I am not sure the 250 has this issue, if the sensor has readout lines breaking it into sections, it might. LCC's can also help correct the light fall off when a back is shifted or when a TS-E type lens is used (Canon 17mm TS-E for example) With the 55 Schneider, you would not get light fall issues.
The Mirror box of the DF, DF+ or other camera body, keeps the rearmost lens element far enough away from the sensor so that won't need an LCC for color cast issues. NOTE, if you had color cast issues, you would see them in the file before you processed the raw, i.e. before you apply the LCC. When they are loaded into C1 or LR. It's very clear on most files especially in the sky.
Can you post a smaller shot, of the entire file? This might be a profile issue being applied to the raw file. Did you use C1 or or another raw converter?
Paul