Blue ice cave

Since it's so hot in many parts of the U.S., I thought this would be a 'cooling off' picture. Try to imagine how good an ice cave would feel about now. I shot this opening of the blue ice cave in southern Iceland in March of 2019 when there had been enough cold to make the caves safe to enter. The cobalt blue, semi-transparent walls and ceiling were magical. It's completely unreal. I used a Sigma 14mm f/1.8 wide angle lens placed close to the ice wall to dramatize the foreground, and even though this lens inherently has incredible depth of field, when the camera position is placed so close to the foreground (about 16 inches in this case), a small aperture is needed to maintain sufficient depth of field. In my opinion, landscape photography -- without exception -- requires complete depth of field. My settings for this shot were 1 second, f/16, and 640 ISO. I obviously used a tripod. You can see the outside was a virtually whiteout.