Curiosity performed an onboard focus merging process during Sol 4197, creating this focus stacked product from several Hand Lens (MAHLI images that were obtained earlier the same sol, each image acquired being at different focus settings. The target is named 'Second Lake', and is located in upper Gediz Vallis in Gale crate. For scale the scene width of this processed MAHLI image is about 9.5 cm (3.74inches). The MAHLI camera is located on the turret at the end of the rover's robotic arm and was placed close to 'Second Lake' to obtain the raw images. Credits: NASA/JPL-Caltech/MSSS