Built-in flash light leaking from a transparent housing causes backscatter or ghosting. INON Clear Photo System has successfully resolved these drawbacks.
Clear Photo System
The Clear Photo System consists of a Clear Photo Film stuck over digital camera's built-in flash surface to convert visible light into infrared ray. Since built-in flash light is not leaked from a housing, we can shoot a subject only with external strobe light. Using a strobe arm to locate the strobe off camera will provide clear underwater images. Off course it is not necessary to attach a black tape on a diffuser panel or housing itself to shade light.
Conventional Strobe System
When shooting with a transparent housing and using the built-in flash light as primary light source, we will see many of white dots on the image as a result of reflection from suspended particles between the subject and camera, so called backscatter.
Using an external strobe and shading the built-in flash with a black tape does not work well if the built-in flash light leaks from the transparent housing. Depending on the design of the transparent housing, built-in flash could create arc-like ghost.
Reduce “backscatter”[exposure of suspended substances in front of a lens]
Using the Clear Photo Film blocks visible light from the built-in flash resulting in clear image without backscatter.
Many of white dots exposed in this image as a result of reflection from suspended particles illuminated by the built-in flash.
Suppress "ghost"[exposure of built-in flash light]
A Clear Photo Film blocks visible light from the built-in flash not to expose it on an image and this advantageous feature does not rely on housing or built-in flash design which differs from model to model.
A transparent underwater housing without Clear Photo Film allows built-in flash light reaching to housing lens port to have "ghost" in attachment lens [white arc on the right top corner of above image].
INON Clear Photo System is the best and only solution to solve above major drawbacks of transparent underwater housing.
Even you stick a black tape on your underwater housing in front of the built-in flash, built-in flash light still can bounce inside of the transparent housing.
*Clear Photo Films are included in Optical D Cable / Cap Set.
*Strobe flashing shoes main flash in sync with camera's main flash.
*The Clear Photo System is patented in the U.S.(no.6,704,500) and PAT.P in Japan.
■Schematic diagrams for explanation and may not the case.