ZoranC
Veteran Member
You can do that if you want to humor yourself. No need for completely white wall and accurate exposure, close enough will be good enough, it will be in your shots just like it was in mine even though I didn't notice it before that just like you didn't.So an overexposed sky won't show the purple shift hmmm. Learned something here. Next time I go out I'll properly expose a white wall or something.
100% crop of lower right corner with ZM 25/2.8: