Sony A 700 Pro DSLR

Aluminum chassis/Magnesium body
Newly-developed high strength aluminum chassis which is 5% lighter and 3x stronger than the A100. Sony tells us the aluminum used is as strong as duralumin and required the development of new processing technology (it is apparently very difficult to work with). The body shell itself is constructed from Magnesium Alloy.

Environmental Sealing
The A700's buttons and levers are sealed to protect against dust and moisture (though it's worth pointing out that the camera is in no way 'waterproof' or 'splashproof').

Optical Pentaprism
In place of the A100's pentamirror design comes an optical pentaprism viewfinder with anti reflective coating offering better brightness, better eye relief and high magnification. The spherical acute matte focus screen is now interchangeable.