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HP 912 Digital Camera User’s Guide 128 Glossary
f-number
The f-number (also called the f-stop) is related to the diameter of the lens aperture
−
dividing the focal
length of the lens by the f-number specifies the aperture diameter. The f-number is used in conjunction
with the shutter speed to set the exposure. A standard set of f-numbers is commonly used in camera
lenses. A lower f-number, such as f/2.8, indicates a larger aperture, which lets in more light. A higher
f-number, such as f/16, indicates a smaller aperture, which lets in less light. See also “aperture” on
page 125 and “focal length” on page 128.
f-number indicator
An indicator in the status and viewfinder LCDs that shows the current f-number setting of the lens.
focal length
The distance between the center of the lens (more precisely, its rear nodal point) and the CCD sensor in
digital cameras when the lens is focused on infinity. The focal length is specified in millimeters.
focus
Refers to adjusting the lens in a digital camera in order to place a clear image on the plane of the CCD
sensor.
focus mode
See “Auto Focus (AF) mode” on page 125 and “Manual Focus (MF) mode” on page 130.
four-way controller
See “4-way controller” on page 125.
f-stop
See “f-number” on page 128.
grouped images
A number of images that are bundled together. You can group images in the Edit menu of Review mode.
Grouped images appear in a folder on the memory card when the camera is connected to a computer.
hot shoe
The fitting on the top of the camera that holds a portable, external flash unit. The hot shoe has an
electrical contact that aligns with the contact on the flash unit's foot and fires the flash when you press the
shutter release button.
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icon
A picture on an LCD, computer screen, or printed on a device that represents a specific setting. Icons on a
digital camera’s LCD communicate the camera's status, such as particular settings that have been made
for taking a picture. See also “LCD” on page 129.
image
The electronic version of a photograph as it is stored in a digital camera, computer, or other electronic
medium. Digital cameras capture and store an image when you take a picture. See also “picture” on
page 131 and “photo” on page 131.
image LCD
The Liquid Crystal Display on the back of the camera. The image LCD and its accompanying
buttons and soft keys let you view and work with images on the camera. See also “DISPLAY button” on
page 126, “MENU button” on page 130, and “soft keys” on page 133.
image type
The type of image the camera will capture. There are three image types: One Shot, Continuous, and
Timelapse. See also “Continuous image type” on page 126, “One Shot image type” on page 130, and
“Timelapse image type” on page 134.