NOTE:  The bonus filter is inside the top of the case inside a hidden panel.  

The Auto-Topcor RE Zoom 87-205mm f/4.7, produced from 1967 to 1972, features a constant aperture from f/4.7 to f/22 throughout its zoom range, ensuring consistent exposure in varying light conditions. Its well-engineered optical design consists of 13 elements, contributing to sharp images and minimal distortion.