This is a zoom lens from Tamron that lets you bring your far away subjects up close while compressing the distance between the main subject and the background for professional-looking results. Even while covering up to a 500mm that enables you to take ultra telephoto shots of subjects further than the eye can see, its design is extremely lightweight and compact. When mounted on an APS-C size digital SLR camera, it provides a focal length equivalent to a 760mm for super ultra telephoto imaging. This lens sports the detachable Filter Effect Control ring. This allows a filter to be rotated to the desired position with the hood still attached, enabling you to simultaneously perform minute adjustments to a polarizer filter. You can confirm the Polarizing effect through the viewfinder, all while using the hood to prevent harmful light from entering the lens.