Sub-Aperture Manufacturing TAKAHASHI 8-inch High Precision(RMs WF errors 1/20 n)Telescope TAKAHASHI Designed optimized achromatic doublet to convert a focal telescope to afocal with Magnification m=10 FK51/ BaK2 Final Design △CTE5.3 0.0027 RMS Error FK51 BaKe -Some sensitivity to thermal shock -Manufacturable tolerancesChart: 4 Sub-Aperture Manufacturing Aperture Manufacturing TAKAHASHI 8-inch High Precision (RMS WF errors 1/20 λ) Telescope Final Design Designed optimized achromatic doublet to convert a focal telescope to afocal with Magnification m=10 •FK51/BaK2 –∆ CTE 5.3 –0.0027 RMS Error –Some sensitivity to thermal shock –-Manufacturable tolerances •FK51/BaK2 –∆ CTE 5.3 –0.0027 RMS Error –Some sensitivity to thermal shock –-Manufacturable tolerances FK51 BaK2