Eimac/Varian Power TubeThis was done setting the tube on translucent plastic. The primary light source was from behind but about a 16th of a stop was coming from below to partially suppress shadows. Additionally, black paper strips lined both sides so as to highlight the features the glass. The tube was rotated so that the logo would be behind dark background. Some post-processing was done to bring out the logo by selecting the color red and increasing the saturation.

Bright field illumination example – This was done setting the tube on translucent plastic. The primary light source was from behind but about a 16th of a stop was coming from below to partially suppress shadows.  Additionally, black paper strips lined both sides so as to highlight the features the glass. The tube was rotated so that the logo would be behind dark background. Some postprocessing was done to bring out the logo by selecting the color red and increasing the saturation.