Focal length
Indicates the magnification and angle-of-view of a lens. The human eye sees things roughly the same as a 43mm focal length of a lens for a 35mm camera.
Focal plane shutter
A shutter which lies just in front of the focal plane. Light sensitive film positioned at the focal plane is progressively exposed as the shutter blinds move across it.
Search SWPP and BPPA ...
Focal length
From Wikipedia, the free encyclopedia
Jump to: navigation, search ...
Focal Plane Shutter
From Nikonians Wiki - FAQs, Photo Glossary, Good Photo Locations, Help
Jump to: navigation, search ...
Focal Length, Visual Space, Crop Factor, Zoom vs. Prime
Cameras
Gadgets
Learn the important facts in this easy to understand article.
Focal Length Multiplier
If you use digital SLRs (dSLRs) that use lenses made for 35mm film cameras, you need to be aware that the focal lengths expressed on the lenses must be multiplied by a factor.
Focal plane shutter
Edit Read more: Camera parts, Shutters
Edited by Awcam
View full history ...
Focal Length
The focal length of a lens is the distance, in millimeter, from the optical center of the lens to the focal plane when the lens is focused at Infinity. There are two important features to look for in a lens.
Focal lengths of digital cameras with a sensor smaller than the surface of a 35mm film can be converted to their 35mm equivalent using the focal length multiplier.
Optical Zoom (X times zoom) and Digital Zoom ...
PDF version Focal Length Fun: 28 mm
Focal Length Fun: 28 mm
There's a special pleasure in shooting with primes.
When very long focal-length lenses or telephoto lenses are being considered, the distance of 600 feet may be much less than infinity.
The longer the focal length the more jumps the church (background object) towards the lamp - the perspective gets COMPRESSED. On the other hand the wide and especially the ultra-wide angle setting moves it away thus creating DEPTH.
Focal Length Multiplier and Crop Factor
Whether a camera lens is seen as wide-angle or tele is dependent on its Angle of View (AoV); for a particular image size AoV is dependent on focal length.
Focal length
Techniques Glossary Focal length
Indicates the magnification and angle-of-view of a lens. The human eye sees things roughly the same as a 43mm focal length of a lens for a 35mm camera.
Focal Length
Focal length is a measurement in millimeters of the distance from the sensor on the camera's face to the focus point of the lens face.
Focal point
Focal point is the exact point at which the camera is focused at maximum sharpness. When looking into the viewfinder it is usually marked in the center with either a circle or a set of brackets.
The Focal Lengths Of Macro
Q) I want a macro lens, but I don't know which to choose. I see that there are three sizes available from Canon: 50mm, 100mm and 180mm. Which is best?
J. Garey
Muscatine, Iowa ...
Hyperfocal Hocus Pocus
This past spring, I covered the basics of depth-of-field and the use of the DOF Preview button, but there is a related topic I haven't touched on yet: hyperfocal distance.
Hyperfocal Distance
As mentioned before, setting focus at H, the Hyperfocal Distance, gives maximum depth of field from H/2 to infinity.
H = (L x L) / (f x d)
Where: ...
Hyperfocal Distance Chart (meters)
The hyperfocal distance is the distance at which a lens should be focused so that everything from infinity to half that distance falls within the depth of field.
Hyper Focal Setting For More Depth of Field
by Russ Burden
Rating: 9 / 10 ...
Focal point is important, depends on what you photographing. Street photography, for example, less relies on focal point - Although having one won't hurt the photo of course.
Nice article Darren.
Focal length - This will, of course, be different for every image that you take. For my shot of Castlerigg Stone Circle I used my 24 to 105mm lens at its widest focal length i.e. 24mm.
The focal length of a lens, usually given in millimeters, is effectively a measure of how "zoomed in" it is.
A confocal optical system is an optical system that determines reflectance of light from a small targeted spot at a single focal point.
Short Focal Lengths
Click to see how extreme wide-angle lenses can be used to create 360 degree interactive panoramas.
Wide-angle lenses can distort objects near the edge of the frame. This is called "barrel distortion".
A prime (fixed focal length) lens is set to one mm focal length. In other words, the focal length cannot be adjusted. If you want to get more or less of the scenery or object in the photograph, then you need to physically move yourself in or out.
You can accomplish this by using what is called the hyperfocal distance setting if your lens has a depth of field scale imprinted on it. This is an important "if" since many of today's lenses don't have a depth-of-field scale.
When set to hyper-focal distance, a camera lens will be sharply focused on anything from half of this distance to infinity.
Well, it's a function of the equivalent focal length. The more you zoom in, the more magnified the shaking of your hand becomes, and the faster you have to shoot.
Do not re-focus the lens once the hyper-focal distance is set. It will be out of focus. Pressing the depth of field preview button (if you have one) will pop the entire image into sharp view.
Focal length (expressed in millimeters): This indicates the angle of coverage, or how much of a scene a lens will take in. The longer the focal length, the closer the subject will appear.
Focal Length The distance between the film or CDD sensor and the optical center of the lens when the lens is focused on infinity. On most cameras the focal length of the lens is marked in millimeters on the lens mount.
Focal Length
Before we talk about the hardware side of things when it comes to lenses, it may be best to first discuss the focal length of a lens. Cameras have lenses on them to focus incoming light and direct it towards the film.
Focal Length
Focal Length is the specific length of the lens' frontal glass element going back to the rear element, measured in millimeters. Focal length of a lens also dictates the various image properties of a lens (i.e.
Focal Length
Focal length is the distance between the focal point of a lens and the film plane when the lens is focused at infinity. It is used to designate the relative size and angle of view of a lens, expressed in millimeters (mm).
Focal length
The distance between the film plane and the focal point (optical centre of the lens) when the lens is focused at infinity. The focal length of the lens is marked in millimetres on the lens mount.
focal length multiplier noun
a multiplicative factor that relates the focal length of a camera to the focal length of a 35mm camera that produces the same field of view
HFOV noun
horizontal field of view, usually expressed in degrees ...
Focal Length
The distance from the film to the optical centre of the lens when the lens is focused on infinity. Focal length on most adjustable cameras is marked in millimetres on the lens mount.
Focal length - distance from the optical center of a lens to the film plane [In layman's terms, this is how long your lens is.
Focal length
The most common way to divide lenses is to group them by their focal length. What focal length you need is depending on what type of photos you are going to shoot.
Focal length
The distance, usually measured in millimeters, between the lens and the focal plane in a camera. As the focal length increases, the field of view decreases.
Focal Length
The focal length of a simple symmetrical lens, is the distance between the image plane (e.g. the film) and the middle of the lens, when light from infinity is brought to a focus.
Flying Erase Heads ...
Focal length
Focal length is the most obvious way in which a lens affects a photo: it controls the angle of view, and hence how much of the scene is included in your photo.
Focal Length - Distance from the lens to the film.
Focal Length Multiplier - You can attach lenses made for 35mm cameras to some SLR digital cameras, and this will result in increasing distance from the lens to the film or multiply it.
Focal Length - the distance between the sensor and the optical center of the lens
Grain - speckles that appear in a picture
Hot Shoe - an electronic contact that can be used to mount a flash on your camera ...
Focal Length indicates the distance between the optical center of a lens and a video camera's image sensor device. For practical purposes, len's focal length refers to a camera's angle of view.
Focal length. The distance from the optical center of the lens to the image sensor when the lens is focused on infinity.
Focal length. The distance from an internal part of a lens (the rear nodal plane) to the film plane when the lens is focused on infinity.
Focal Length
The distance from the film to the optical center of the lens when the lens is focused on infinity. Focal length on most adjustable cameras is marked in millimeters on the lens mount.
focal length
A focal length sets the field of view your camera offers and is dependent on the camera lens. Low end cameras give you one choice.
Focal Length The distance from the principal point to the focal point. Focal Plane The precise position (plane) within the camera body, behind the shutter curtain, at which the light gathering surface of the image sensor is fixed.
Focal Length: Describes the magnification and field of view of a cameras lens which is dependent on the size of the imaging sensor used.
Focal Length Equivalency: Since most users are familiar with 35mm camera lenses, digicam lens specs are frequently stated in those terms. For example, a digicam lens that zooms from 9.2mm to 28mm would be described as 36mm to 110mm (equiv).
Focal length The distance from the rear model plane of a lens to the focus when the lens is focused at the infinity position.
It is the lens' angle of view, generally bracketed into wide angle, normal or telephoto.
FOCAL LENGTH ("35mm EQUIVALENT")- 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.
Focal length - A term that describes the magnifying power of a lens: the longer the focal length, the greater the magnification; the smaller the focal length, the more wide-angle the lens.
Focal plane
To describe it, we should imagine there is a plane perpendicular to the optical axis where the light ray is commonly passes through and form a sharp focus. It will form a plane of sharp focus when the lens is set at infinity.
Focal length - The distance between the surface of the camera lens and the sensor array at the back of the camera. The focal length of the camera determines how large the subject appears.
FOCAL PLANE SHUTTER - A camera shutter situated directly in front of the film, composed of an opaque curtain that contains a slit that moves directly across in front of the film, permitting light to strike the film.
 See also: Camera, Image, Lens, Photograph, Light
|
