Focal Length of 85 mm
This shot is to be compared with the previous one which was taken with a shorter focal length lens. Both were taken from approximately the same place. This image was taken with an 85 mm focal length lens - a moderate telephoto lens. The "field of view" is much smaller and you can see much less of the nearby building. Both have the same number of pixels, so this image shows more detail, but of a smaller area. In the first image, the clock face is about 75 pixels in diameter, but in this image it is 210 pixels in diameter. More detail!