Description
The William Optics Gran Turismo 81 IV APO Triplet refractor features a 3-element f/5.9 objective with an Ohara FPL-53 extra-low-dispersion glass element for optimum colour correction and a new upgraded dual-speed 2-inch Rack & Pinion focuser with 1:10 Dual Speed.
DOWNLOADS: Instruction Manual (EN)
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