Manufactured from 1973 to 1977, the F2S Photomic used the DP-2 head. Although it looked very different, the DP-2 was functionally very similar to the DP-1. It substituted an all-solid-state light-both-LEDs exposure control system using two arrow-shaped light-emitting diode (LED) over/underexposure indicators for better visibility in low light situations and better overall reliability. This was important, because the DP-2's CdS meter had better low-light sensitivity than the DP-1—down to Exposure Value (EV) −2, instead of EV 1, at ASA 100. A chrome Nikon F2S Photomic with Nikkor 50 mm f/1.4 lens had a US list price of $961 in 1976. Note: SLRs were usually discounted 30 to 40 percent from list.