Focal Length: A lens' angle of
view, most commonly indicated as wide-angle, normal or telephoto. Usually compared to a
35mm camera's lens.
The lens in a digital camera is almost always smaller than in a 35mm SLR (single lens
reflex) camera. Because of that the actual focal lengths mean little to those who are
already familiar to photography. To assist in understanding, digital camera manufacturers
state the focal lengths of the lenses in terms of "35mm equivalent."
The focal length is measured in millimeters, the lens on a digital camera is marked with
it's focal length and this is typically a very small number such as 6 - 15mm, in
traditional 35mm photography everyone is "used to" the common focal lengths of
28mm, 50mm, 200mm etc. Because the CCD in a digital camera is much smaller than a 35mm
negative the lenses can be made smaller (because of this they have to be of a much higher
quality), to get the true focal length you need to multiply this small size by a value
called the "focal length multiplier" (this is especially important for digital
SLR's which take normal 35mm lenses).
Lenses, with a range of focal lengths running from a mild wide-angle (roughly equivalent
to a 35mm lens on a 35mm camera) out to a mild telephoto (slightly more than the
equivalent of a 100mm lens on a 35mm camera). While you invariably pay more for a camera
with zoom capability, we've found the feature very useful in real-life shooting
situations.
|
Sony_Digital_Cameras
Kodak_Digital_Cameras
Canon_Digital_Cameras
Olympus_Digital_Cameras
Fuji_Digital_Cameras
Nikon_Digital_Cameras
About
Contact Us
Links
|
