Rating Portra Film

A question we get at the lab a lot is, “What should I rate my film at?” and more specifically, “How should I rate my Portra400 and Portra800?” The answer? It depends. Rating techniques vary depending on your style. To help safeguard your shadows we suggest rating film on the side of overexposure. To show Portra’s latitude, we created exposure ramps so you can determine which rating technique is best for your aesthetic! ⁠ ⁠

**Keep in mind, these results are for this particular day in this particular lighting. We encourage everyone to run exposure ramp tests in the environments they shoot in most often with their film stock of choice to see what works best for them! ⁠