Basic Terminology

Aperture

The aperture value (f/number) indicates the size of the aperture opening in the lens. It is equal to the focal length devided by the aperture diameter. It adjusts the amount of light striking the CMOS sensor. The aperture value is displayed on the camera’s top LCD panel and in the viewfinder. It can range anywhere from 1.0 to 91, depending on the lens attached to the camera.

Shutter speed

The shutter speed is the length of time the camera’s shutter opens to expose the CMOS sensor to the light coming through the lens. It adjusts the amount of light striking the CMOS sensor.

Format

When you format a CF card, it prepares the card to store data in it. It also erases any data stored on the card. Before formatting a CF card, be sure it has no valuable data.

File names

 

 

 

 

 

 

 

 

 

 

A file name is assigned automatically to each image

(Example) 5F9Z0001.JPG

you capture. The file name consists of a unique, four-

 

 

 

 

 

 

 

 

 

 

character camera code preset at the factory and a file

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Extension

number assigned automatically. The camera code

 

 

 

 

 

 

 

 

File number

cannot be changed. The file number is assigned

 

 

Camera code

 

automatically according to the numbering method you selected (→p.56).

The extension will be “JPG” for JPEG images or “TIF” for RAW images. For sound files, the extension will be “WAV.”

Firmware

This is software containing various camera control instructions. The EOS-1Ds uses the firmware for shooting and image processing. Although the firmware is preinstalled in the camera, you can later install the latest version of the firmware when it becomes available.

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Reference

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