FSQ-85ED Baby Q

The Takahashi FSQ-85ED (the "Baby Q") apochromatic ED quadruplet features a four-element double ED element modified Petzval optical system optimized for imaging as well as visual applications. With a tube length of only 12.7" when the dew shield is retracted, the "Baby Q" is highly airline-transportable, making it ideal for astrophotographers seeking a compact, portable astrograph. This optical design produces levels of correction for coma, astigmatism, field curvature, secondary spectrum, spherical aberration, and spherochromatism that are unsurpassed, delivering exceptional performance for both wide-field imaging and visual observing with minimal chromatic aberration.