Pinhole camera works off the principle that light travels in straight lines. It consists of a light-proof box with a tiny hole on one side. In this project, we make our own pinhole camera.
We made our camera with a paper box with two holes cut on one side. The circular hole below is for the digital camera to capture the image made by the pinhole, the hole above is fitted with pinholes of different sizes to produce images. The edges of the box were sealed with duct tape to prevent leaking of light
The interior is lined with black paper to absorb any light that leaks into the box not from the pinhole. The side opposite to the pinhole is lined with a white paper as our film
In this project, we had three sizes pinhole, 1mm, 3mm, 5mm. Here are a presentation of our results. Note that based on the principle of pinhole camera, all images will be captured upside down, here they are flipped for better display
All images were taken with the same image settings. We can observe that as pinhole size gets larger, the images get brighter. This is because there are more light entering into the box with a larger pinhole. However, the images also get more blurry, since larger pinhole size means that each point on the object could fall on more locations on the paper, hence the sharpness of the images decrease considerably.
I take these images with a pinhole of size 1mm. Instead of using the black box we made, I used a camera with lens removed and covering the sensor with the pinhole
Since the principle behind the pinhole is so simple, we apply this to a room. Here is one image taken with a dark room as pinhole box using 1mm pinhole.We can see the curtain in the image.