Sony Alpha DSLR-A700

Posted by: takreem on: October 19, 2008

• In: digital camera | SONY
• 3 Comments

Nearly two years after Konica Minolta transferred its camera division over to Sony, and over a year after Sony’s first DSLR (the A100), today is the day that the curtain is finally lifted on the long-awaited ‘high end’ Alpha digital SLR (in principle the replacement for the Konica Minolta 7D). The new model sports an impressive specification including magnesium alloy construction, 12MP CMOS sensor (with on-chip A/D conversion), 5fps shooting and a wealth of features and customization options, though interestingly (given the recent spate of announcements) no live view option. There’s also a couple of new lenses and a new vertical shooting grip.

Like Sony’s mainstream DSLR-A100 model, the new A700 unit incorporates Super SteadyShot® Inside image stabilization in the camera body and is compatible with most Minolta Maxxum® mount lenses in addition to Sony lenses.

 

Picture Quality

The camera’s new 12.2-megapixel Exmor™ CMOS sensor conducts analog-to-digital (A/D) signal conversion and dual noise reduction right on the sensor itself. Noise reduction is applied to analog signals before A/D conversion and the resulting digital signals are then subject to a second round of noise reduction.

Clean, noise-free digital signals are then sent to the newly developed BIONZ™ processing engine. Lubell said this engine has been optimized to process data-rich picture information at high speeds, and to reduce picture noise in the RAW data stage before final image compression and encoding. The results are high-resolution, detailed images with rich tonal reproduction.

Extraordinary Responsiveness

 

A newly developed, auto-focus system features 11 wide-area sensors, including a center dual cross sensor comprised of two horizontal and two vertical line sensors for exceptional AF precision.  An F2.8 line sensor leverages the brightness of fast aperture lenses for even greater precision.  Lubell said that extraordinary focusing speed has been realized through improved algorithms and a high-torque focusing drive motor. The large, bright, viewfinder uses a precision-ground optical glass pentaprism and a high refractive index eyepiece lens to provide 0.9x viewfinder magnification and 95 percent frame coverage.  Manual focusing is aided by an interchangeable spherical acute matte focusing screen.

The camera has a high-performance vertical traverse shutter with a maximum shutter speed of 1/8,000th of a second to freeze fast-moving action. A high-power coreless motor charges the shutter and mirror mechanism, allowing continuous shooting at up to five frames per second. In JPEG fine or standard mode, continuous shooting is limited only by the capacity of the media card (sold separately), while up to 18 frames can be captured in RAW.

Expanded Creativity

The new camera features fourteen creative styles, including night view, autumn leaves or vivid, which can be selected to enhance images. These effects can then be fine-tuned by customizing contrast, sharpness, zone matching and other parameters. Sony’s Dynamic Range Optimizer (DRO) function has been updated on this model so users can choose the desired level of detail recovered in areas of shadow. The advanced mode offers the option of five levels of user selectable correction. Additionally, DRO bracketing creates three images from a single capture with three different levels of DRO.

 

There is an extensive array of customization options to personalize the camera to match shooting styles. The unit’s quick navigation interface can be accessed instantly with the four-way multi-selector, and selected parameters can be adjusted directly by control dials

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