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Zoom lenses are often described by the ratio of their longest to shortest focal lengths. For example, a zoom lens with focal lengths ranging from 100 mm to 400 mm may be described as a 4:1 or "4Ã-" zoom.

 


Zoom head
An electronic flashgun feature that allows the flash coverage to be adjusted. Flashguns are usually designed to cover the same angle as a standard lens, so when a wide angle lens is used you may find the edges of the frame are darker.

Zoom Flash
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Zoom lenses on digicams work much like the ones on camcorders. There are two buttons. One lets you zoom in, increasing the focal length and narrowing the angle of view, while the other lets you zoom out, widening the angle of view.

Zoom from Wide to Tele 32.5 to 130 mm (4 x)
1.5
Half-press Lag (0->S1) Wide angle
~0.5
Half-press Lag (0->S1) Telephoto
~0.9
Half to Full-press Lag (S1->S2) LCD live view
~0.09
Half to Full-press Lag (S1->S2) Viewfinder
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Zoom Lens
A Zoom Lens is a camera accessory that allows a photographer to take close-up shots of his subjects. Similar to a telephoto lens, the zoom lens can magnify a subject anywhere from two to up to twelve times its original size.

Zoom Rocker Button: Directly to the right of the Shutter button, this two-way rocker button controls the optical and digital zoom (when enabled) in Shooting mode.

Zoom:
Zooming:
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With zoom you can switch between close up and a faraway point. There is a very important thing to think about when buying a camera and that is the difference between optical and digital zoom.

The perfect zoom pair. 28-70mm f-2.8 & 80-200mm f-2.8
It wasn't long ago when single focal length lenses with fast apertures were the only choices for those wanting sharp and fast optics.

-Variable focal-length (zoom) lens. variable focal length from about 35mm to 70mm. They are usually small and lightweight. They are designed to be used instead of a normal focal-length lens, not to replace a range of focal length lenses.

Zoom lens are great, but unfortunately they cripple feeling of perspective and feeling of frame.

Macro zoom lenses are not macro lenses. They don't allow significantly greater magnification than a 30mm or 50mm normal lens and they deliver low quality.
Macro Lenses ...

Zoom comes in three varieties; optical, digital and cropping:
An optical zoom actually changes the amount of the scene falling on the image sensor. Every pixel in the image contains unique data so the final photo is sharp and clear.

Zoom lens or fixed lens: Zoom lenses have slower apertures that produce soft pictures when taken from a distance. To get around this, get closer to your subject and skip the zoom.

Zoom lens
A zoom lens offers a continuously variable focal length, normally without the need to refocus. A wide-angle zoom covers a range of focal lengths that include a wide angle setting.

Zoom:
Original Size - this will do the processing on the full original image. What you see is what will be saved. This is good if you want to verify sharpness or noise reduction effect on the image.
Preview Size (default) - DCE 1.

Zoom Blurring
This effect is achieved by choosing a relatively long exposure time and zooming just after the shutter is released. The picture below shows a sort of coma effect because the zooming was finished well before the shutter was closed.

Zoom lenses are very versatile but they also have some limitations. See the Photo Tech Tips section of this web site for my opinions on Zoom Lenses and Prime Lens.

Zoom
A type of lens that allows you to zoom from a size view of a scene to a closer look at your subject.
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ZOOM LENS - A lens in which focal length is variable. Elements inside a zoom lens shift their positions, enabling the lens to change its focal length - in effect, providing one lens that has many focal lengths. (Also called a "Variable focus lens.") ...

Zoom lens.
A lens with a variable focal length is a true optical zoom.
Such lenses have a rotating or push-pull ring that lets you set the exact focal length you want to use. And altering the focal length of the lens alters the field of view.

Zoom lens
Lens which allows varying of the focal length of the lens itself.
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Zoom Lens A lens in which you adjust the focal length over a wide range. In effect, this gives you lenses of many focal lengths.
A Glossary of Photographic Terms Menu
Text representation of this image.

Zoom in so the sign fits the frame, fire the shutter and zoom out smoothly. As results are unpredictable, take several shots and pick the best.
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Zoom in. In fact, just take a look at beautiful photos of food in cookbooks and blogs to get a feel of how much zoom can make a difference
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Zoom ring
Similar to a focus ring, but used for manually zooming the camera.

Zoom Lens. A zoom lens allows you to take a close-up shot while still being far away from your subject. This gives the advantage of your pet not knowing you are taking their photograph.

Zoom
A zoom lens is a compound lens with a variable effective focal length.

zoom
making an image or image part become larger than it appears on the original.
zoom-in
to make an image larger.

Zoom Lens. This is as necessary as it is convenient. Without a zoom lens, you'll be manually moving the projector forward and back to achieve a proper image size.

ZOOM LENSES vs. PRIME LENSES
A zoom lens is one where the photographer can vary the focal length within a pre-defined range, whereas this cannot be changed with a "prime" or fixed focal length lens.

Zoom allows you to change between wide angle and close up shots.
This step of the digital camera buyers guide has a couple of things to watch out for when looking at zoom...

Zoom
Allows you to remain at a physical distance from your subject, while making the picture appear to have been taken from close up. See Digital Zoom and Optical Zoom.

Zoom
A Lens which is constructed to allow a continuously variable focal length; in effect, this gives you many lenses of different focal lengths in one unit. (e.g. 80-200 mm).
(see Focal length, Standard lens, Tele & Wide) ...

Zoom lens A zoom lens is a feature on higher-end projectors that allows adjustment of focal length instead of moving the projector.

Zoom Lens: A lens that incorporates a range of focal lengths. A 'standard' zoom range will often go from wide angle to telephoto.
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Zoom lenses
Optical zoom is probably the most popular lens feature on consumer cameras. Normally the zoom range is restricted to around 3:1. On the cheaper cameras, there is a trade-off in maximum aperture at longer focal lengths, e.g.

Zoom, Optical vs. Digital vs. Total
Whereas an optical zoom uses the optics (lens) of the digital camera to move you closer to your subject, a digital zoom simply uses the existing image and enlarges it digitally.

Zoom Lens
A lens which can be adjusted to a wide range of focal lengths. This allows a photographer to carry fewer lens. Zoom lens are difficult to design and manufacture.

Zoom lens:
Lens with an adjustable focal length that lets you see a scene from a narrow to a wide field of view.
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Zoom Lens: A lens in which the focal length can be adjusted over a wide range. One touch zoom lenses allow the photographer to adjust the focal length by pushing or pulling the focusing ring.

ZOOM LENS- Some lenses have the ability to change their magnification level through a range of focal lengths (wide angle through telephoto). This is called a zoom lens as is seen on most all camcorders.

Zoom lens. A lens with several moving elements which can be used to produce a continuous range of focal lengths.

Zoom, optical - A feature that alters a camera's focal length, filling more of the frame with the subject.
Zoom lens - A lens with an adjustable focal length that lets you see a scene from a narrow to a wide field of view.
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Zoom Lens
A lens of variable focal length. Most digicams come with some sort of zoom lens.

Zoom Lens - A lens in which the focal length is adjusted over a wide range. In effect, this provides lenses of many focal lengths.

zoom lens:
Lens with variable focal length within a certain range.
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Zoom Lens
A popular lens on many cameras that allows the user to adjust the focal length over many focal lengths yet not have to change the focus.
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Zoom Lens - A variable focal length lens. The most common on digital cameras has a 3:1 ratio (i.e. 35-105mm). See "3x" and "Focal Length"
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Zoom
Used instead of collections of fixed-focal-length lenses and, unfortunately, instead of a dolly.
Zoomitis *
A serious nervous disorder. Cause: uncontrollable lunging. Symptoms: extreme dizziness and disorientation. Cure: Zoomenders.

Zoom lens is a lens which is constructed to allow continuously variable focal length within a specific range. The effective aperture and focus settings remain unchanged throughout such adjustments.
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Zoom, pan, and hold are keys to a dynamic photo montage.
I'm sure you've seen photo montages that have images fade in and fade out for 10 minutes and that's pretty much all the photo montage does with the photos.

The zoom tool can be used to enlarge the image, if so desired. However, for this image, enlarging the image is not necessary. The Straighten Tool is chosen and is used to draw a line along the bank (see Figure 2).

Optical Zoom
An optical zoom is made to bring you closer to your subject, without you having to move. Zooms are constructed to allow a continuously variable focal length, without disturbing focus.

Digital Zoom versus Optical Zoom
As compact digital cameras started to become popular several years back, one of the ways manufacturers attempted to differentiate their products was by extending the zoom range.

Digital Zoom
Digital zooms magnify a small area at the center of a digital image. Digital zooms degrade image quality, cause color to fade, and increase digital "noise".

Digital Zoom: Uses digital technology to enlarge an image. Digital zoom does not have moving parts. It is the electronic enlarging of the middle of an image.

digital zoom
The camera uses software rather than a true optical lens to zoom in on a subject. The camera discards pixels on the edge of the picture and enlarges the center subject area.

Using a zoom lens makes it is possible to change from a 3/4 portrait to a full-length portrait without having to move the camera. The images below show a full-length shot without moving the lighting, subject or camera position. [figure 15]
Figure 15 ...

See also: Camera, Image, Lens, Digital, Light