This image shows a 3-D printed model of Mastcam-Z, one of the science cameras on NASA's Mars 2020 rover. Mastcam-Z will include a 3:1 zoom lens.
NASA
<a rel="nofollow" class="external free" href="https://mars.nasa.gov/resources/21363/mastcam-z-model/">https://mars.nasa.gov/resources/21363/mastcam-z-model/</a>