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ZWO FF Apochromatic Refractors

ZWO FF apochromatic refractors are quadruplet designs with a built-in flattening element, so they deliver a flat field for astrophotography without a separate flattener. The range covers the FF70-APO at f/7.0, FF90-APO at f/6.8, FF110-APO at f/7.0 and FF131-APO at f/7.5.

Matching reducers shorten the focal ratio for faster imaging: a 0.75x full-frame reducer for the FF65, a 0.76x for the FF80 and a 0.7x universal reducer for the FF107 and FF130.

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$309.00 - $309.00
$309.00
$309.00 - $309.00
$309.00

ZWO FF107/FF130 APO 0.7× Universal Reducer

ZWO-F107130RE

0.7x Focal Reduction Factor Designed for ZWO FF107 & FF130 APO Refractors Triplet Optical Design with 1 ED Element Standard 55mm Back Focus In...

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$309.00 - $309.00
$309.00
$309.00 - $309.00
$309.00
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$1,499.00 - $1,499.00
$1,499.00
$1,499.00 - $1,499.00
$1,499.00

ZWO FF110-APO 110mm Quadruplet Refractor F/7.0

ZWO-FF110-APO
1 in stock

110mm Aperture 766mm Focal Length (f/7) 4-Element Apochromatic Optics Integrated Field Flattener 3-inch Dual-Speed Focuser 14.9 lb. Weight with Ha...

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$1,499.00 - $1,499.00
$1,499.00
$1,499.00 - $1,499.00
$1,499.00
$599.00 - $599.00
$599.00
$599.00 - $599.00
$599.00

ZWO FF70-APO 70mm Quadruplet Refractor F/7.0

ZWO-FF70-APO
2 in stock

70mm Aperture 490mm Focal Length (f/7) 4-Element Quadruplet Optical Design Integrated Field Flattener 2.4" Dual-Speed Rack & Pinion Focuser 6....

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$599.00 - $599.00
$599.00
$599.00 - $599.00
$599.00
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$199.00 - $199.00
$199.00
$199.00 - $199.00
$199.00

ZWO FF65 APO 0.75× Full Frame Reducer

ZWO-F65RE

Reduces FF65 APO focal ratio to f/4.8 0.75x reduction factor for wider fields of view Standard 55mm back focus from the M48 thread Integrated M48x...

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$199.00 - $199.00
$199.00
$199.00 - $199.00
$199.00
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$249.00 - $249.00
$249.00
$249.00 - $249.00
$249.00

ZWO FF80 APO 0.76× Full Frame Reducer

ZWO-F80RE
Only 1 left!

0.76x focal reduction factor Designed for the ZWO FF80-APO Refractor Triplet optical design with one ED element Standard 55 mm back focus Integrat...

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$249.00 - $249.00
$249.00
$249.00 - $249.00
$249.00
$1,999.00 - $1,999.00
$1,999.00
$1,999.00 - $1,999.00
$1,999.00

ZWO FF131-APO 131mm Quadruplet Refractor F/7.5

ZWO-FF131-APO
1 in stock

131mm Aperture 983mm Focal Length (f/7.5) 4-Element Air-Spaced Quadruplet Design 3-inch Dual-Speed Rack & Pinion Focuser 20.7 lb. Weight with ...

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$1,999.00 - $1,999.00
$1,999.00
$1,999.00 - $1,999.00
$1,999.00
$999.00 - $999.00
$999.00
$999.00 - $999.00
$999.00

ZWO FF90-APO 90mm Quadruplet Refractor F/6.8

ZWO-FF90-APO

90mm Aperture 609mm Focal Length (f/6.8) 4-Element Quadruplet Optical Design 3" Dual-Speed Rack & Pinion Focuser 9.97 lb. Weight with Handle, ...

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$999.00 - $999.00
$999.00
$999.00 - $999.00
$999.00