Less saturated sides

[Patryk Kaflowski]

I think sides of frames are less saturated in my Red One mx. Check that frame https://postimg.org/image/l6rqvpvjf/
Anybody know why?

 

[Nick Gardner]

What lens?

 

[Patryk Kaflowski]

I don't remember exacly but we tested 2 lens. It was some old lenses. With alexa was ok. Do you think it could be because of bad black shading?
https://www.youtube.com/watch?v=h-B4BCZDuZo (1 - alexa, 2 -red, 3 - sony(with other lens))