Here is a photo of the famous volcanic crater called Diamond Head. Located on the island of Oahu in Hawaii, USA, it's a famous landmark and can be from the air. On the ground, one can also climb to the top of Diamond Head. It's a long walk and there is one place were there is a staircase with 99 steps. This photo was taken with a MIR-1B 2.8 / 37 MM Russian Lens and a Sigma SD10. One must modify the lens with a metal file before it can be used with the Sigma SD10. Otherwise, the protrusion from the back of the lens could damage the dust cover on the inside of the camera. Once modified, it does take great photos.