Done at home to experience with different light temperatures. Here there's tungsten, fluorescent and very light sunlight (not directly) Fluorescent prevails as you can see by the greenish cast. This lens was the best I've ever had up to that moment. Hope that I find some as good as that on my comeback to this passion, but now powered by Nikon - F2A, 50mm1.4. Kinda back to basics, back to the future.