NEW FROM TAKAHASHI!
The FOA-60 is Takahashi's latest fluorite doublet refractor. The 60 mm aperture FOA-60 is available in two versions: The 530 mm f/8.8 base unit, or the 900 mm f/15 deisgn that incorporates the new Extender 1.7XR. In this new design, the spacing of the doublet elements is such that the correction for spherical aberration is like that found in the larger TOA series. This design results in outstanding visual and photographic performance over a 44 mm diameter image circle.
The FOA-60 uses a dedicated flattener and extender. The Flattener 0.93X provides a nearly flat, 10 micron field across the entire image circle. The Extender 1.7XR converts the base model to the FOA-60Q. This combination has a Strehl ratio exceeding 99%, allowing for magnifications up to 300X without loss of image quality.
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