Large Medium format (44 x 33 mm) sensor Large sensor in Pentax 645D ensures a good low light image quality compared to smaller sensors, and it also provides higher pixel quality compared to smaller sensors.
Very High Resolution Sensor: 40.0MP Pentax 645D's 40.0MP sensor is perfect for landscape photography. It will capture a lot of fine details and let you print them larger.
Environmental Sealings Landscape photographs are taken outdoors and you should be prepared for all kind of weather conditions.
No Live-view Making fine focus adjustments using live view is more precise than using a viewfinder.