Branden Poe

I purchased a Nikon R8 a few weeks back and recently shot a roll of Ektachrome 100D to test the camera (using only natural light.) I had the roll processed and when I ran it through my projector I found that all of the blacks are yellow. It's not just a slight tint...it's unmistakably yellow, and the deeper the black, the brighter the yellow. I know it's not the projector because other rolls project fine. Any insight for a new super-8 shooter?