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TAKAHASHI FSQ-106EDX4 QUADRUPLET REFRACTOR TELESCOPE
TAKAHASHI TSA-120 REFRACTOR TELESCOPE
TAKAHASHI TOA-150B REFRACTOR
In this doublet design, Takahashi has paired the fluorite element with a low dispersion glass having a high refractive index. This combination provides excellent optical performance across the entire visible spectrum with a Strehl ratio in excess of 97.6