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IMPORTANT: Our store is located in Canada. All orders that include products manufactured outside of Canada or USA will be subject to tariffs and duties, regardless of the order value. US customers are responsible for all applicable duties and tariffs, and those will be billed by the carrier, except for the Lacerta upgrade kit, for which we collect them at checkout.
IMPORTANT: Our store is located in Canada. All orders that include products manufactured outside of Canada or USA will be subject to tariffs and duties, regardless of the order value. US customers are responsible for all applicable duties and tariffs, and those will be billed by the carrier, except for the Lacerta upgrade kit, for which we collect them at checkout.

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