Takahashi FS-60CB Refractor OTA

• The ultimate mobile apo. The FS-60CB pairs first-class optical and mechanical quality with genuinely outstanding compactness, making it the refractor you'll actually grab and go with.
• Fluorite doing what fluorite does best. An air-spaced apochromatic fluorite doublet, built with the same care as Takahashi's larger scopes, delivers excellent chromatic correction at prime focus and holds solid diffraction performance even more than 14 mm off the optical axis.
• One scope, endless roles. Use it for astronomical or terrestrial observation, turn it into a wide field astrograph, or press it into service as a guide scope, all with the same compact tube.
• A whole accessory ecosystem to grow into. Add the FL-FS-60C field corrector or the FC/FS MFL1.04X multi-flattener to flatten the field for wide-field photography, drop in the RD-C0.72X focal reducer for a faster F/4.2 setup, or fit the EX-CQ1.7X extender to transform it into the longer-reach FS-60Q at F/10.
• Field-flattening that actually matters. The optional correctors restore field flatness for wide-field imaging, letting you use the latest CCD and digital cameras corner to corner without restriction.
• Light enough to forget it's there. At just 1.4 kg and 440 mm long, the FS-60CB disappears into a bag without disappearing from your results.
• Mechanical excellence, Takahashi style. The build quality here is what puts the FS-60CB among the best refractors of its diameter on the market, a claim purists will find easy to believe once they look through it.

Specifications

• Objective: Fluorite doublet apochromat
• Lens Cell: Air-spaced doublet, fluorite element on the front
• Coatings: Hard multicoatings
• Diameter: 60 mm

At Prime Focus

• Focal Length: 355 mm
• Focal Ratio: F/5.9
• Metal Back Distance: 162 mm

With FL-FS-60C Field Corrector

• Focal Length: 370 mm
• Focal Ratio: F/6.2
• Image Circle Diameter: 45 mm
• Metal Back Distance: 56.2 mm

With FC/FS MFL1.04X Field Corrector

• Focal Length: 370 mm
• Focal Ratio: F/6.2
• Image Circle Diameter: 45 mm
• Metal Back Distance: 56.2 mm

With RD-C0.72X Focal Reducer

• Focal Length: 255 mm
• Focal Ratio: F/4.2
• Image Circle Diameter: 40 mm
• Metal Back Distance: 56.2 mm

With EX-CQ1.7X Focal Extender (FS-60Q Configuration)

• Focal Length: 600 mm
• Focal Ratio: F/10
• Metal Back Distance: 158.4 mm

Optical Tube

• Length: 440 mm
• Tube Diameter: 80 mm
• Dew Shield Diameter: 80 mm
• Weight: 1.4 kg
• Focuser: Rack-and-pinion

What's in the Box?

• FS-60CB Optical Tube Assembly x1

Note: The FL-FS-60C field corrector, FC/FS MFL1.04X multi-flattener, RD-C0.72X focal reducer, and EX-CQ1.7X focal extender are optional accessories, sold separately.

Software and Docs

System-chart of Takahashi FS-60CB refractor

System-chart of Takahashi FS-60CB refractor with Extender-C2X

System-chart of Takahashi FS-60CB refractor with Extender-Q1.6X

Instruction manual of Takahashi FS-60CB refractor