The D700 is ideal for those seeking a perfectly-balanced DSLR on the move, without compromising durability or environmental resistance to moisture and dust. The D700 incorporates an image sensor cleaning system that uses high frequency vibrations to reduce the accumulation of dust on the image sensor surface. A responsive 5fps is possible with the compact 1500mAh EN-EL3e lithium-ion battery, with up to 8 fps possible by attaching the optional MB-D10 battery pack to use the powerful 2500mAh EN-EL4a battery if desired. This offers complete power supply integration for those already using the D3 and D300. Another first is the practical i-TTL built-in pop up flash with 24mm lens coverage, ideal for discrete flash lighting when a full size Speedlight might be too cumbersome. In addition, the D700 is infrared converted for those infrared enthusiasts.