eddm1962
Backlit (Explored)
The theme for this weeks Macro Mondays entry is Backlit. A picture taken with back lighting.
I assure you that this picture is 100% in compliance, being lit by only one light source, and that source being behind the subjects in this photograph. No mirrors or reflective devices of any kind were used.
I am also fairly confident that a great many of you will instantly know how I setup and took this shot. If not, I will post an explanation at the close of entries for this weeks Macro Mondays posts.
HMM.
The setup
This picture is of two ordinary objects, a pen, and a small plastic bead, that have been lit from behind. The light source is slightly below the objects, and just out of frame to the right side of the picture.
The light source is what makes this picture special. It is an ultraviolet LED flashlight. Ultraviolet light is a form electromagnetic radiation (in the spectrum of light) whose wavelength is too short to be seen by the human eye. The ultraviolet light causes the objects to fluoresce. Fluorescence occurs when the plastics absorb energy from the ultraviolet light and then reradiate a portion of this energy at a longer wavelength that we can see. That is why the objects appear to be glowing. They are actually producing light within the spectrum that we can see.
The light is actually only hitting the top portion of both objects. After a little trial and error, I found out that if both objects were completely lit by the light, that they produced very strong internal reflections which created some very over exposed areas. You can see some of this effect if you look closely at the bottom edge of the bead.
Many people are familiar with ultraviolet light when it is referred to by its common name, black light. Many common things will fluoresce under ultraviolet light. Some minerals, soaps and detergents, different types of plastics, and even scorpions fluoresce when lit with ultraviolet. Oh and also just about anything that is a ‘fluorescent’ color. Think highlighter pens.
So as I have explained I was completely in compliance with the theme. No one said what type of light we had to use.
HMM.
Backlit (Explored)
The theme for this weeks Macro Mondays entry is Backlit. A picture taken with back lighting.
I assure you that this picture is 100% in compliance, being lit by only one light source, and that source being behind the subjects in this photograph. No mirrors or reflective devices of any kind were used.
I am also fairly confident that a great many of you will instantly know how I setup and took this shot. If not, I will post an explanation at the close of entries for this weeks Macro Mondays posts.
HMM.
The setup
This picture is of two ordinary objects, a pen, and a small plastic bead, that have been lit from behind. The light source is slightly below the objects, and just out of frame to the right side of the picture.
The light source is what makes this picture special. It is an ultraviolet LED flashlight. Ultraviolet light is a form electromagnetic radiation (in the spectrum of light) whose wavelength is too short to be seen by the human eye. The ultraviolet light causes the objects to fluoresce. Fluorescence occurs when the plastics absorb energy from the ultraviolet light and then reradiate a portion of this energy at a longer wavelength that we can see. That is why the objects appear to be glowing. They are actually producing light within the spectrum that we can see.
The light is actually only hitting the top portion of both objects. After a little trial and error, I found out that if both objects were completely lit by the light, that they produced very strong internal reflections which created some very over exposed areas. You can see some of this effect if you look closely at the bottom edge of the bead.
Many people are familiar with ultraviolet light when it is referred to by its common name, black light. Many common things will fluoresce under ultraviolet light. Some minerals, soaps and detergents, different types of plastics, and even scorpions fluoresce when lit with ultraviolet. Oh and also just about anything that is a ‘fluorescent’ color. Think highlighter pens.
So as I have explained I was completely in compliance with the theme. No one said what type of light we had to use.
HMM.