With 4 objectives and 5 sets of oculars, it provides nearly any magnification needed.
All objectives are apochromatic, and all oculars compensating.
Oculars are 5x, 7x, 10x, 15x, and 20x. The 5x, 7x, and 10x are paired, and the 15x and 20x are single eyepieces for photography using the separate vertical tube. Since the binocular head has a magnification of 1.5x, the effective objective magnifications are 7.5, 10.5, and 15x. An additional 7x eyepiece with both gridded and ruled reticles is provided. The fine-focus mechanism is unique and extremely convenient, being a horizontal ring in the base, visible in the picture.