Digital SLR Cameras: 645D
- Medium-format imaging power
- Image processing
- Photo shooting
- Operability
- Weather-resistant performance
- Post-shooting resources
Magnesium-alloy casing assures outstanding durability,
reduced weight and superb resistance against shock
The 645D’s casing is made of lightweight, high-strength magnesium alloy, which also possesses outstanding shock-resistant, heat-radiation and magnetic-shielding characteristics. In fact, it forms a highly reliable, extra-solid armor for internal mechanisms. As a result, the 645D endures many years of strenuous field use and meets the trust and expectations of demanding photographers.
Aluminum-diecast chassis is the key
to outstanding kinetic accuracy and thermal stability
The chassis that constitutes a flange back and an optical pass of the finder/autofocus optics must be extremely solid and built with high precision. That’s why the 645D employs high-strength aluminum diecast for its chassis, in order to assure a high level of kinetic accuracy and thermal stability. The CCD unit is fixed on the chassis, with a heat-radiation sheet sandwiched in between. The rear section of the chassis functions as a heat sink to release the heat radiated by the CCD unit and to minimize the noise generated by dark current.
Highly airtight construction
prevents the intrusion of dust and water
In keeping with PENTAX’s pursuit of a highly reliable photographic system for outdoor settings, both the 645D and new D FA 645 lenses feature dustproof, weather-resistant designs. The camera body is also cold-resistant, assuring solid performance at temperatures as low as -10°C. Since the 645D performs superbly and dependably even in the harsh shooting conditions of cold latitudes, you can capture once-in-a-lifetime shutter opportunities without failure.
DR II mechanism with Dust Alert system
removes unwanted dust with great efficiency
using supersonic vibrations
To prevent annoying dust spots from ruining potentially great images, the 645D features the dependable DR (Dust Removal) II mechanism. By shifting UV/IR-cut filters placed in front of the CCD image sensor at supersonic speed using a piezoelectric element, this mechanism effectively and efficiently shakes dust off the image sensor. The camera even features the innovative Dust Alert system, which detects dust particles clinging to the image sensor and indicates their positions on the LCD monitor. Thanks to these user-friendly tools, you can spot and remove dust much easier and more completely than ever before.