the IDEA
This project has been fueled by great inspiration from the bright depths of the the Mediterranean Sea
The challenge of capturing the submerged landscape using a pinhole camera
led to the development of the Liquid Pinhole technique.
the CAMERA
The main body of the liquid pinhole camera is a heavy-duty plastic box
adjusted with the cover of a film developing tank. Through the inlets of the labyrinth,
water can enter the box but light cannot.
Given that the project requires to take the camera at a depth of more than 1 m
water intrusion into the box is unavoidable.
As a result the camera is built in such a way so
it gets flooded by seawater in order to be deployed.
A 0.6mm diameter pinhole was opened on a piece of aluminum which then was adjusted on the box. This pinhole diameter is the most suitable for the given focal length
of the box and it results in f300 aperture number.
the EXPOSURE
One of the most important parts of the project is the calculation of the exposure time
for the underwater image.
To achieve this, the Ultimate Exposure Computer was used in combination with the
adjusted exposure times for the f300 aperture.
The Ultimate Exposure Computer provides the EV number for given ISO sensitivity,
shutter speed and aperture fnumber settings. the EV number is a measure of light intensity.
In clear coastal waters EV number may vary between EV 10-7 depending on weather, depth and water conditions.
In this project, photographic paper was used as photosensitive medium.
First step is to shoot 1-2 images with a digital underwater camera set at constant ISO
and check the fnumber and shutter speed settings. Then by reading these settings on
the Ultimate Exposure Computer the EV number for the given ISO is calculated.
Assuming that photographic paper corresponds to very low ISO, lowest ISO is selected at the correct EV number and new settings are established for the pinhole camera with f300 aperture.
The resulting exposure time is approximately 10-15 mins however due to reciprocity failure effects this exposure time needs to be extended.
This project has been fueled by great inspiration from the bright depths of the the Mediterranean Sea
The challenge of capturing the submerged landscape using a pinhole camera
led to the development of the Liquid Pinhole technique.
the CAMERA
The main body of the liquid pinhole camera is a heavy-duty plastic box
adjusted with the cover of a film developing tank. Through the inlets of the labyrinth,
water can enter the box but light cannot.
Given that the project requires to take the camera at a depth of more than 1 m
water intrusion into the box is unavoidable.
As a result the camera is built in such a way so
it gets flooded by seawater in order to be deployed.
A 0.6mm diameter pinhole was opened on a piece of aluminum which then was adjusted on the box. This pinhole diameter is the most suitable for the given focal length
of the box and it results in f300 aperture number.
the EXPOSURE
One of the most important parts of the project is the calculation of the exposure time
for the underwater image.
To achieve this, the Ultimate Exposure Computer was used in combination with the
adjusted exposure times for the f300 aperture.
The Ultimate Exposure Computer provides the EV number for given ISO sensitivity,
shutter speed and aperture fnumber settings. the EV number is a measure of light intensity.
In clear coastal waters EV number may vary between EV 10-7 depending on weather, depth and water conditions.
In this project, photographic paper was used as photosensitive medium.
First step is to shoot 1-2 images with a digital underwater camera set at constant ISO
and check the fnumber and shutter speed settings. Then by reading these settings on
the Ultimate Exposure Computer the EV number for the given ISO is calculated.
Assuming that photographic paper corresponds to very low ISO, lowest ISO is selected at the correct EV number and new settings are established for the pinhole camera with f300 aperture.
The resulting exposure time is approximately 10-15 mins however due to reciprocity failure effects this exposure time needs to be extended.
