I need a very compact zoom lens for a smartphone.
Our current setup uses a smartphone at the end of a tube with an objective lens but the field of view on the smartphone camera is 85 degrees. We need to keep the existing smartphone lens and have a small assembly in front of the camera with lenses to reduce the field of view to around 15 degrees. equivalent to a 7x telephoto lens but in an ultra slim and compact design with off-the shelf lenses. We source lenses mainly from Edmund optics so their range of lenses would be ideal.