Here is a photo that I took! It is of my chemistry lab notebook last semester -- I had a few mishaps.. The photo was taken with my android phone and then imported into photoshop and converted from color to greyscale.
Monday, January 13, 2014
Time of exposure in photography -- Brita Ness
In photography, the amount of light that reaches a film is referred to as exposure. The longer the exposure time, the more light is let in and the lighter the photo appears. When a photograph is underexposed, it is difficult or impossible to detect subtle changes in darker areas (shadows), while with an overexposed photograph it is difficult to detect subtle changes in lighter areas (highlights). In other words, in underexposed photos, dark areas appear uniformly black and in overexposed photos, white areas appear uniformly white. In pinhole cameras, larger holes and shorter focal lengths (the distance from the hole to the photographic film) let in more light and increase exposure, while smaller holes and longer focal lengths let in less light and decrease exposure.
Here is a photo that I took! It is of my chemistry lab notebook last semester -- I had a few mishaps.. The photo was taken with my android phone and then imported into photoshop and converted from color to greyscale.
Here is a photo that I took! It is of my chemistry lab notebook last semester -- I had a few mishaps.. The photo was taken with my android phone and then imported into photoshop and converted from color to greyscale.
Dark Room Procedures:
When entering and exiting the dark room make sure that one door is closed so no light can come in. Do not turn on the light before knocking and asking other students who are in the room.
1. Mount photo paper in the back of the box with tape. (shiny side up)
****Be sure that the door is closed and the lights are off so the paper is not exposed to the light.
2. Once the paper is in, close the box and cover the hole with tape.
3. Make sure that when you are walking around with the camera you have the tape covered hole facing downwards. (away from any light)
Once you've taken your photo...
!. Put photo paper into the developer for 2 minutes.
2. Next put it into the water.
3. Then, put paper into the fixer for 2 minutes.
****Make sure you don't share the tongs between the developer and the fixer!
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