Common skin warts (also called cutaneous warts) are raised round or oval growths. A wart may be lighter or darker than the skin around it. Some warts may have tiny black dots in them, often called seeds. The dots are small, clotted blood vessels. Warts may occur alone or in larger groups that merge and form patches.
According to Canon (link):  Canon addressed the âfeedback loopâ in later model IS lenses by introducing an algorithm to the IS detection system to automatically recognise when the lens is mounted to a tripod.
Itâs common to see digital cameras with high sensitivity settings at ISO 1600, ISO 3200 and beyond. The Nikon D3s and Canon 1D Mark IV (both are $5000 cameras) offers sensitivity settings up to ISO 102,400. These cameras can see in the dark better than I can with my eyes.