Nikon released its D70 digital SLR camera in 2004. It was discontinued in 2005, when the D70S model appeared. The Nikon D80 model replaced the D70S only a year later. The Nikon D70 and Nikon D80 are similar but differ in megapixels, points of autofocus, image size, dimensions, weight and sensitivity, among other features.
Megapixels and Image Size
The Nikon D70 has a 6.1-megapixel sensor while the Nikon D80 has a 10.2-megapixel one. The number of megapixels of a camera reflects its image resolution, which is related to the capacity for printing bigger pictures without losing quality. When set in its largest format, the Nikon D80 can provide digital images of 3,872 megapixels by 2,592 megapixels, while the Nikon D70's maximum picture size is 3,008 megapixels by 2,000 megapixels.
Dimensions and Weight
Both the Nikon D70 and the D80 weigh approximately 1 pound, 5 ounces, without battery, caps, memory cards and lenses. However, the D70 is 5.5 inches wide and 4.4 inches high, being slightly bigger than the D80 model, which measures 5.2 inches in width and 4.1 inches in height.
Light Sensitivity
The sensitivity of a digital camera is related to its capacity for capturing light, and it is measured in values of ISO, which stands for International Organization for Standardization. Low ISO values, such as 100 and 200, are ideally used on sunny days or in well-lit environments. When using higher ISO numbers, such as 1600, the camera's capacity for capturing light is increased. The Nikon D70 offers ISO values ranging from 200 to 1600, while the Nikon D80's ISO settings vary from 100 to 1600, according to the manufacturer's website.
Points of Autofocus
Focus is an important aspect in photography, and it can be determined manually or automatically. Nikon digital cameras have a system of autofocus, which can capture a number of focus points across the picture. The Nikon D70 offers only five points of autofocus, while the Nikon D80 provides a sophisticated 11-area autofocus system and a center sensor with broader coverage.
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