The Leica Leitz Elmar 135mm f4.5 SM (S#:942) is a high-quality telephoto lens designed for portrait and standard photography. With a maximum aperture of f/4.5, this manual focus lens offers a smooth and precise focus control. Its screw mount allows for easy installation on Leica cameras, while the 39mm compatible lens front ensures a secure fit. Perfect for capturing detailed images with a classic telephoto perspective, this Leica lens is a reliable and versatile choice for photographers looking to enhance their portrait and standard photography skills.