Translation of estrictamente

Hi Christin, how are you? I am on vacation right now, but you can call me if there are any problems. I am planning to meet my students in the end of next week. I will deliver the message anyway.
The film used (positive) is much more accurate in terms of color and pixels. It has a much higher range of colors, but the difficulty is that it is very sensitive and that is has a lot of contrast.
I found a pair of Nike shoes for a bargain and I do not know until this day why those shoes were so cheap. I am sure that they are not fake, as they are great quality. My wife also bought a pair.