What is an EV?

Ev stands for exposure value. A change of one Ev adjusts the exposure calculat- ed by the camera by a factor of two.

+2.0

Ev

4X as much light

+1.0

Ev

2X as much light

0.0

Ev

Calculated exposure

–1.0 Ev

1/2 as much light

–2.0 Ev

1/4 as much light

Light Sources and Color

The human eye adapts itself extremely well under different conditions. The paper of this manual you are reading looks white regardless of the type of lighting. Photographic systems are much less flexi- ble. As the light source changes, so does the overall color of a scene - fluorescent office ceiling lights create a green cast to pictures, regular household tungsten light bulbs make everything red. Like your eyes, the camera’s white-balance controls adjust for different lighting to make natural looking pictures.

The most common source of light, our sun, changes color depending on the time of day and the atmospheric conditions. The sun is of course very warm near the horizon and very blue at noon. The daylight preset white-balance setting is for beautiful sunny days. When the weather is overcast, the color is cooler. When the main light source is skylight, light from the blue sky rather than the direct light of the sun, the resulting color is very blue. The shade preset white-balance is designed for this condition.

Artificial lighting is more consistent but will show variations. Tungsten lamps become warmer as their wattage decreases. And fluorescent lamps come in classifications that define their color. The preset white balance settings can be adjusted with the rear control dial (p. 70) to match the change in these light sources.

Some artificial lighting has a discontinuous spectrum that creates very unnatural color in a photo- graph. White balance cannot correct high-energy vapor lighting: sodium-vapor (yellow highway lights), or mercury vapor. For portraits under these lighting conditions, the flash can be used to overpower the ambient light. With landscapes containing these types of lights, set the white balance to the preset daylight setting.

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Konica Minolta DiMAGE_A2 instruction manual What is an EV?, Light Sources and Color, 111
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DiMAGE_A2 specifications

The Konica Minolta DiMAGE A2, introduced in 2004, is a notable digital camera that marked a significant step in the evolution of compact digital photography. Sporting a sleek design and an array of advanced features, the DiMAGE A2 is ideal for both amateurs and photography enthusiasts seeking versatility and quality in a compact package.

One of the standout features of the DiMAGE A2 is its impressive 8-megapixel CCD sensor, which delivers stunning image quality with rich colors and fine detail. The camera supports a wide ISO range from 50 to 800, allowing users to capture clear images in various lighting conditions, reducing the need for flash in low-light environments.

Equipped with a powerful 7x optical zoom lens, the DiMAGE A2 boasts a focal length equivalent to 28-200mm in 35mm format. This range provides users with the flexibility to shoot wide-angle landscapes or zoom in on distant subjects, all while maintaining sharpness and clarity. Additionally, the lens features a fast maximum aperture of f/2.8, which enhances performance in low-light situations.

The camera is built around Konica Minolta's Advanced Anti-shake technology, offering significantly reduced camera shake, especially during handheld shooting. This system stabilizes the sensor, making it easier to capture sharp images without the need for a tripod, even at slower shutter speeds.

For enhanced usability, the DiMAGE A2 includes a flip-out LCD display, offering a versatile viewing experience whether you're shooting at low or high angles. The 1.8-inch color LCD is complemented by an electronic viewfinder, providing users with the option to compose shots in a manner they find most comfortable.

Moreover, the DiMAGE A2 features an extensive range of manual controls, including custom white balance, exposure compensation, and metering modes, allowing photographers to fine-tune their settings according to specific shooting scenarios. These capabilities cater to the creative demands of users looking to explore different photographic techniques.

The camera also supports various shooting modes, such as portrait, landscape, and macro, making it easy to switch styles based on the subject matter. Its ability to shoot in RAW format provides more flexibility in post-processing, enabling photographers to make significant adjustments without compromising quality.

Connectivity options include USB and video out, making it convenient to transfer images and connect to external devices. The DiMAGE A2 is powered by rechargeable lithium-ion batteries, ensuring that users have the energy needed for extended shooting sessions.

In summary, the Konica Minolta DiMAGE A2 stands out for its combination of an 8-megapixel sensor, a versatile zoom lens, advanced stabilization technology, and user-friendly features. It remains a compelling choice for those looking to explore the world of digital photography with a capable and compact camera system.
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