The FOA-60 from Takahashi is a new compact apochromatic fluorite doublet refractor. This telescope features a 60mm aperture and a 530 mm focal length.
It is also available with a 1.7X extender, which increases the focal length to 901 mm. The version with the 1.7X extender is known as the FOA-60Q.
The spacing of the doublet elements is such that the correction of the spherical abberations is similar to that found in the much larger TOA series. This innovative design results in a strehl ratio in excess of 96% for the base unit and over 99% with the extender.
- Compact design for relatively long focal length, making it ideal for transport
- Outstanding visual and photographic performance, providing a 44 mm diameter image circle for full frame imaging
- Available with a 1.7x extender and a 0.93x flattener
Note: FOA-60 Shown. Mount, tripod, tube holder and finder not included.
Takahashi FOA-60 refractor
CHARACTERISTIC | TAKAHASHI FOA-60 REFRACTOR |
Objective | Fluorite doublet apochromat |
Lens cell | Air-spaced doublet. Fluorite in the front |
Coatings | Hard multicoatings |
Diameter | 60 mm |
AT PRIME FOCUS | |
Focal length | 530 mm |
Focal ratio | F/8.8 |
Metal Back Distance | 175.6 mm |
WITH FL0.93X FIELD CORRECTOR | |
Focal length | 495 mm |
Focal ratio | F/8.2 |
Image circle diameter | 44 mm |
Metal Back Distance | 56.2 mm |
WITH EXQ1.7XR (FOA-60Q) FOCAL EXTENDER | |
Focal length | 900 mm |
Focal ratio | F/15 |
Image circle diameter | 44 mm |
Metal Back Distance | 208.1 mm |
CHARACTERISTIC | TAKAHASHI FOA-60 REFRACTOR |
Length of the optical tube | 500 mm |
Diameter of the optical tube | 68 mm |
Diameter of the dew-shield | 80 mm |
Weight | 1.5 kg |
Focuser | Rack-and-pinion |

Spot-diagram of Takahashi FOA-60 at prime focus

Spot-diagram of Takahashi FOA-60 with FL0.93X field corrector

Spot-diagram of Takahashi FOA-60 with EXQ1.7X (FOA-60Q) focal extender
DOCUMENTATION
Recommended for the TAKAHASHI FOA-60 ORTHO APOCHROMATIC REFRACTOR
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