FC Focus block with coarse and fine focus (Fits 20mm mounting post, see FC11 below)
Coaxial coarse and fine focusing slide block designed for applications where precise fine focus adjustment is required. Rack and pinion mount allows smooth, precise focusing over 33mm of travel. Coarse focus mechanism incorporates a slip clutch and tension adjustment. Fits 20mm mounting post, 84.2mm diameter opening accepts 84mm stereo microscope body. Note: 71mm mounting pins require FC11 extension.