Letter: U

Umbrella

What Is an Umbrella Used for When Taking Photographs? When taking photographs in a situation that requires supplemental lighting if you think that an umbrella is used to keep equipment and photographers dry, you would be mistaken! A photography umbrella is a key tool in a photographers kit which is used to soften and diffuse the light produced by an off camera light source such as a flash unit. White translucent umbrellas diffuse and spread harsh light, silver reflective umbrellas throw light over a 180 degree field, and Parabolic umbrellas focus flash light. When using an umbrella the off camera...

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Underexposure

What Does Underexposure Mean When Talking About Photography? If too little light is recorded when capturing an image the image is said to be ‘underexposed’; The imaging medium i.e. film, or sensor has not been exposed to light for long enough to capture a sufficiently bright image. Underexposure of an entire image occurs when the combination of shutter speed, aperture and ISO chosen to capture an image have not been chosen correctly by the shooter, or metered correctly by the camera. Underexposure in dark areas of some scenes is unavoidable if the dynamic range being captured is too high,...

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Unsharp Masking

What Is Unsharp Masking and How Is It Used When Editing Photos? Unsharp masking is a techniques used when editing photographs to remove blurriness from an image. The name may initially appear confusing because it would appear to suggest the removal of sharpness, but is derived from the fact that the technique uses a blurred or ‘unsharp’ negative of an image as a mask to increase sharpness. the technique can be traced back to 1930’s Germany where the process involved the creation of a physical second negative of an image. The advent of digital photography and powerful image editing software...

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Upload

What Does Upload Mean When Talking About Photography? When talking about photography the term upload means to transfer information from one device to another. Photographers often upload their images from camera to computer, and then subsequently upload the images from the computer to a hard drive for storage and backup purposes. Uploading of information can be achieved by various methods depending on the hardware capabilities of your equipment. Wired uploading can be achieved using your camera and computer’s USB interfaces. Alternatively, if your hardware has either Bluetooth or built-in Wi-Fi then information can be transferred wirelessly between compatible systems....

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USB

What Does USB Stand for when Talking About Photography? USB stands for ‘Universal Serial Bus’ and is a form of data connection and transfer protocol. The data input/output port on most modern cameras is a type of USB port and USB ports can be found on nearly all modern computers. USB interfaces can be used to upload information, for example images and metadata, from a camera to a computer system. they can also be used to charge the batteries in some compatible devices rather from having to remove the battery and place it into a separate charging cable. There...

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UXGA

What Does UXGA Mean When Talking About Photography? UXGA means ‘Ultra Extended Graphics Array’ and refers to an image resolution size of 1600 x 1200 pixels which in photography terms equates to 1.92mp. UXGA video interfaces and compatible equipment first appeared around 2010 and the resolution is still widely used today in many office and home computer systems. Running higher resolution compatible equipment is relatively costly making UXGA a popular choice for many home editing setups.  The advantage of higher resolution displays when viewing or editing images is the ability for the display to render higher levels of detail,...

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