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.
Play Watch the âDay in the Lifeâ video. to see Canon STM lenses in action. Canon STM lenses shoot great photos and even better videos. Theyâre named after an element of technology called a Stepping Motor, which lets the lenses focus smoothly and silently when capturing video.hile some lenses make little but audible mechanical noises when they focus, STM lenses focus in near silence, allowing you to record what you see and what you hearâwithout any distractions. When shooting live music, use a tripod to help keep your image stable as you shift focus from one musician to another.