ZWO FF70 f/7 APO Quadruplet Refractor Telescope
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- 70mm f/7 flat-field APO refractor designed for sharp, wide-field deep-sky imaging
- 490mm focal length offers a wide, versatile field of view for nebulae, star clusters, and larger deep-sky targets
- Quadruplet optical design helps deliver well-corrected stars across the frame
- No separate field flattener required, making setup simpler and spacing less complicated
- Generous 44mm image circle provides coverage for full-frame and smaller astronomy cameras
- Compact, travel-friendly OTA that pairs well with lightweight mounts like the ZWO AM3N and AM5N
- Dual-speed focuser allows for precise manual focusing and fine adjustments
- Includes essential mounting and imaging accessories to help you get your setup built faster
- Save when you bundle the ZWO FF70 & AM3N imaging kit — explore the deal!
ZWO FF70 APO — Beginner-Friendly Scope, Serious Imaging Power
ZWO is expanding their lineup of standout telescopes with the newest addition to their flat-field apochromatic refractor series. The ZWO FF70 APO is a 70 mm quadruplet featuring a highly regarded, four-element air-spaced optical design. By incorporating specialized ED glass, this system dramatically improves color correction and image clarity while completely eliminating the need for an external field flattener. Because the flat-field correction is built directly into the optics, you can bypass complex back focus calculations and tedious spacing adjustments—simply attach your camera, find focus, and start capturing.
With a 490 mm focal length and f/7 focal ratio, this refractor strikes the perfect balance between high-contrast deep-sky performance and grab-and-go portability. It boasts a generous 44 mm image circle that fully illuminates large sensors, making it exceptionally versatile for both astrophotography and visual astronomy. The system offers seamless compatibility with dedicated ZWO ASI cameras, DSLR/mirrorless bodies, and standard 1.25-inch or 2-inch diagonals. Rounding out its user-friendly design is a robust feature set that includes a 360° rotator, a precise dual-speed focuser, quick-release mounting rings, and a dedicated photographic extension tube with integrated 2-inch filter threads!
ZWO FF70 is Packed with Thoughtful Features!
Flexible Connectivity
The ZWO FF70 APO features a 70 mm (2.76 in) aperture and 490 mm focal length (f/7.0), offering an excellent balance between portability and performance. The optical tube weighs just 2.5 kg (5.51 lb), with a total system weight of 3 kg (6.61 lb) including mounting rings and dovetail plate.
Built for All Astronomers
Highly versatile and seamlessly adapts to multiple imaging or visual setups. It provides native, plug-and-play compatibility with dedicated ZWO ASI, standard DSLR, or mirrorless cameras. Beyond deep-sky imaging, it easily converts into a high-end visual observation setup by supporting visual diagonals and eyepieces.
Flat-Field Design
The FF70 APO features a native flat-field optical design, eliminating the need for an additional field flattener. No complex back focus calculations or spacing adjustments are required—simply attach your imaging setup and start capturing once focus is achieved.
Four-Element Optical Design
The FF70 APO features a four-element, fully air-spaced apochromatic optical design. All four elements work together to deliver a flat imaging field without the need for an additional field flattener. One ED (extra-low dispersion) glass element is incorporated to effectively reduce chromatic aberration, resulting in improved color correction and image clarity.
Photography Extension Tube
The FF70 APO includes a photography extension tube with a 2-inch filter thread, along with rear adapters in M48x0.75 and M54x0.75 standards. This allows for easy integration with a wide range of imaging accessories.
Native Flat-Field Design
The FF70 APO features a native flat-field optical design, eliminating the need for an additional field flattener.
No complex back focus calculations or spacing adjustments are required—simply attach your imaging setup and start capturing once focus is achieved.
Convenient Design
Equipped with a rigid 2.4-inch rack-and-pinion focuser, the FF70 APO offers precise control with a 1:10 coarse & fine focus adjustment mechanism. A built-in 360° rotator at the rear allows for smooth and accurate camera angle adjustments.
Integrated Features for Ease
The FF70 APO features a retractable dew shield, reducing overall length for improved portability. Precision CNC machining and a high-quality painted finish, combined with an internal anti-reflection coating, help minimize stray light and enhance image contrast. The mounting rings are detachable, allowing for quick and easy setup or teardown of the telescope.
Specifications:
-
Effective Aperture: 70 mm (2.76 in)
-
Focal Length: 490 mm
-
Focal Ratio: f/7.0
-
Objective Type: Four-element air-spaced APO (includes 1 ED element)
-
Image Circle: 44 mm (1.73 in)
-
Maximum Rear Connection Length (Focuser Retracted):
-
Imaging Mode:
-
82.5 mm (3.25 in) measured from M48×0.75 male thread
-
100.5 mm (3.96 in) measured from M54×0.75 male thread
-
-
Observation Mode:
-
117 mm (4.61 in) measured from 1.25 in eyepiece holder
-
127 mm (5.00 in) measured from 2 in eyepiece holder
-
-
-
Overall Length:
-
372.5 mm (14.67 in) with 1.25 in interface retracted
-
415 mm (16.34 in) with photography extension tube retracted
-
430.9 mm (16.96 in) with 1.25 in interface dew shield extended
-
473.4 mm (18.64 in) with photography extension tube dew shield extended
-
-
Telescope Body Weight: 2.5 kg (5.51 lb)
-
Standard Configuration Weight: 3.0 kg (6.61 lb) including handle, mounting rings, and dovetail plate
-
Rear Interfaces:
-
M64x0.75 to M54x0.75
-
M54×0.75 to M54x0.75
-
M54x0.75 to M48x0.75 (built-in M48x0.75 filter thread)
-
-
Interface of the Three-Stage Imaging Adapter: M48x0.75
-
Notes: *Focus can be achieved within a back focus range of 32.5–82.5 mm, measured from the M54–M48 interface shoulder
Important FF70 Diagrams
Optical Layout
Mechnical Diagram
Star Field Map
Other Information
- Country of Manufacture: China
ZWO FF70 APO — Beginner-Friendly Scope, Serious Imaging Power
ZWO is expanding their lineup of standout telescopes with the newest addition to their flat-field apochromatic refractor series. The ZWO FF70 APO is a 70 mm quadruplet featuring a highly regarded, four-element air-spaced optical design. By incorporating specialized ED glass, this system dramatically improves color correction and image clarity while completely eliminating the need for an external field flattener. Because the flat-field correction is built directly into the optics, you can bypass complex back focus calculations and tedious spacing adjustments—simply attach your camera, find focus, and start capturing.
With a 490 mm focal length and f/7 focal ratio, this refractor strikes the perfect balance between high-contrast deep-sky performance and grab-and-go portability. It boasts a generous 44 mm image circle that fully illuminates large sensors, making it exceptionally versatile for both astrophotography and visual astronomy. The system offers seamless compatibility with dedicated ZWO ASI cameras, DSLR/mirrorless bodies, and standard 1.25-inch or 2-inch diagonals. Rounding out its user-friendly design is a robust feature set that includes a 360° rotator, a precise dual-speed focuser, quick-release mounting rings, and a dedicated photographic extension tube with integrated 2-inch filter threads!
ZWO FF70 is Packed with Thoughtful Features!
Flexible Connectivity
The ZWO FF70 APO features a 70 mm (2.76 in) aperture and 490 mm focal length (f/7.0), offering an excellent balance between portability and performance. The optical tube weighs just 2.5 kg (5.51 lb), with a total system weight of 3 kg (6.61 lb) including mounting rings and dovetail plate.
Built for All Astronomers
Highly versatile and seamlessly adapts to multiple imaging or visual setups. It provides native, plug-and-play compatibility with dedicated ZWO ASI, standard DSLR, or mirrorless cameras. Beyond deep-sky imaging, it easily converts into a high-end visual observation setup by supporting visual diagonals and eyepieces.
Flat-Field Design
The FF70 APO features a native flat-field optical design, eliminating the need for an additional field flattener. No complex back focus calculations or spacing adjustments are required—simply attach your imaging setup and start capturing once focus is achieved.
Four-Element Optical Design
The FF70 APO features a four-element, fully air-spaced apochromatic optical design. All four elements work together to deliver a flat imaging field without the need for an additional field flattener. One ED (extra-low dispersion) glass element is incorporated to effectively reduce chromatic aberration, resulting in improved color correction and image clarity.
Photography Extension Tube
The FF70 APO includes a photography extension tube with a 2-inch filter thread, along with rear adapters in M48x0.75 and M54x0.75 standards. This allows for easy integration with a wide range of imaging accessories.
Native Flat-Field Design
The FF70 APO features a native flat-field optical design, eliminating the need for an additional field flattener.
No complex back focus calculations or spacing adjustments are required—simply attach your imaging setup and start capturing once focus is achieved.
Convenient Design
Equipped with a rigid 2.4-inch rack-and-pinion focuser, the FF70 APO offers precise control with a 1:10 coarse & fine focus adjustment mechanism. A built-in 360° rotator at the rear allows for smooth and accurate camera angle adjustments.
Integrated Features for Ease
The FF70 APO features a retractable dew shield, reducing overall length for improved portability. Precision CNC machining and a high-quality painted finish, combined with an internal anti-reflection coating, help minimize stray light and enhance image contrast. The mounting rings are detachable, allowing for quick and easy setup or teardown of the telescope.
Specifications:
-
Effective Aperture: 70 mm (2.76 in)
-
Focal Length: 490 mm
-
Focal Ratio: f/7.0
-
Objective Type: Four-element air-spaced APO (includes 1 ED element)
-
Image Circle: 44 mm (1.73 in)
-
Maximum Rear Connection Length (Focuser Retracted):
-
Imaging Mode:
-
82.5 mm (3.25 in) measured from M48×0.75 male thread
-
100.5 mm (3.96 in) measured from M54×0.75 male thread
-
-
Observation Mode:
-
117 mm (4.61 in) measured from 1.25 in eyepiece holder
-
127 mm (5.00 in) measured from 2 in eyepiece holder
-
-
-
Overall Length:
-
372.5 mm (14.67 in) with 1.25 in interface retracted
-
415 mm (16.34 in) with photography extension tube retracted
-
430.9 mm (16.96 in) with 1.25 in interface dew shield extended
-
473.4 mm (18.64 in) with photography extension tube dew shield extended
-
-
Telescope Body Weight: 2.5 kg (5.51 lb)
-
Standard Configuration Weight: 3.0 kg (6.61 lb) including handle, mounting rings, and dovetail plate
-
Rear Interfaces:
-
M64x0.75 to M54x0.75
-
M54×0.75 to M54x0.75
-
M54x0.75 to M48x0.75 (built-in M48x0.75 filter thread)
-
-
Interface of the Three-Stage Imaging Adapter: M48x0.75
-
Notes: *Focus can be achieved within a back focus range of 32.5–82.5 mm, measured from the M54–M48 interface shoulder
Important FF70 Diagrams
Optical Layout
Mechnical Diagram
Star Field Map
| Manufacturer | ZWO Astronomy Cameras |
|---|---|
| Telescope Focal Length | 401 - 500mm |
- 1x FF70 APO optical tube
- 1x Photographic extension tube
- 1x User manual
- 1x Inspection sheet
- 1x Warranty card
- 70mm f/7 flat-field APO refractor designed for sharp, wide-field deep-sky imaging
- 490mm focal length offers a wide, versatile field of view for nebulae, star clusters, and larger deep-sky targets
- Quadruplet optical design helps deliver well-corrected stars across the frame
- No separate field flattener required, making setup simpler and spacing less complicated
- Generous 44mm image circle provides coverage for full-frame and smaller astronomy cameras
- Compact, travel-friendly OTA that pairs well with lightweight mounts like the ZWO AM3N and AM5N
- Dual-speed focuser allows for precise manual focusing and fine adjustments
- Includes essential mounting and imaging accessories to help you get your setup built faster
- Save when you bundle the ZWO FF70 & AM3N imaging kit — explore the deal!
ZWO FF70 APO — Beginner-Friendly Scope, Serious Imaging Power
ZWO is expanding their lineup of standout telescopes with the newest addition to their flat-field apochromatic refractor series. The ZWO FF70 APO is a 70 mm quadruplet featuring a highly regarded, four-element air-spaced optical design. By incorporating specialized ED glass, this system dramatically improves color correction and image clarity while completely eliminating the need for an external field flattener. Because the flat-field correction is built directly into the optics, you can bypass complex back focus calculations and tedious spacing adjustments—simply attach your camera, find focus, and start capturing.
With a 490 mm focal length and f/7 focal ratio, this refractor strikes the perfect balance between high-contrast deep-sky performance and grab-and-go portability. It boasts a generous 44 mm image circle that fully illuminates large sensors, making it exceptionally versatile for both astrophotography and visual astronomy. The system offers seamless compatibility with dedicated ZWO ASI cameras, DSLR/mirrorless bodies, and standard 1.25-inch or 2-inch diagonals. Rounding out its user-friendly design is a robust feature set that includes a 360° rotator, a precise dual-speed focuser, quick-release mounting rings, and a dedicated photographic extension tube with integrated 2-inch filter threads!
ZWO FF70 is Packed with Thoughtful Features!
Flexible Connectivity
The ZWO FF70 APO features a 70 mm (2.76 in) aperture and 490 mm focal length (f/7.0), offering an excellent balance between portability and performance. The optical tube weighs just 2.5 kg (5.51 lb), with a total system weight of 3 kg (6.61 lb) including mounting rings and dovetail plate.
Built for All Astronomers
Highly versatile and seamlessly adapts to multiple imaging or visual setups. It provides native, plug-and-play compatibility with dedicated ZWO ASI, standard DSLR, or mirrorless cameras. Beyond deep-sky imaging, it easily converts into a high-end visual observation setup by supporting visual diagonals and eyepieces.
Flat-Field Design
The FF70 APO features a native flat-field optical design, eliminating the need for an additional field flattener. No complex back focus calculations or spacing adjustments are required—simply attach your imaging setup and start capturing once focus is achieved.
Four-Element Optical Design
The FF70 APO features a four-element, fully air-spaced apochromatic optical design. All four elements work together to deliver a flat imaging field without the need for an additional field flattener. One ED (extra-low dispersion) glass element is incorporated to effectively reduce chromatic aberration, resulting in improved color correction and image clarity.
Photography Extension Tube
The FF70 APO includes a photography extension tube with a 2-inch filter thread, along with rear adapters in M48x0.75 and M54x0.75 standards. This allows for easy integration with a wide range of imaging accessories.
Native Flat-Field Design
The FF70 APO features a native flat-field optical design, eliminating the need for an additional field flattener.
No complex back focus calculations or spacing adjustments are required—simply attach your imaging setup and start capturing once focus is achieved.
Convenient Design
Equipped with a rigid 2.4-inch rack-and-pinion focuser, the FF70 APO offers precise control with a 1:10 coarse & fine focus adjustment mechanism. A built-in 360° rotator at the rear allows for smooth and accurate camera angle adjustments.
Integrated Features for Ease
The FF70 APO features a retractable dew shield, reducing overall length for improved portability. Precision CNC machining and a high-quality painted finish, combined with an internal anti-reflection coating, help minimize stray light and enhance image contrast. The mounting rings are detachable, allowing for quick and easy setup or teardown of the telescope.
Specifications:
-
Effective Aperture: 70 mm (2.76 in)
-
Focal Length: 490 mm
-
Focal Ratio: f/7.0
-
Objective Type: Four-element air-spaced APO (includes 1 ED element)
-
Image Circle: 44 mm (1.73 in)
-
Maximum Rear Connection Length (Focuser Retracted):
-
Imaging Mode:
-
82.5 mm (3.25 in) measured from M48×0.75 male thread
-
100.5 mm (3.96 in) measured from M54×0.75 male thread
-
-
Observation Mode:
-
117 mm (4.61 in) measured from 1.25 in eyepiece holder
-
127 mm (5.00 in) measured from 2 in eyepiece holder
-
-
-
Overall Length:
-
372.5 mm (14.67 in) with 1.25 in interface retracted
-
415 mm (16.34 in) with photography extension tube retracted
-
430.9 mm (16.96 in) with 1.25 in interface dew shield extended
-
473.4 mm (18.64 in) with photography extension tube dew shield extended
-
-
Telescope Body Weight: 2.5 kg (5.51 lb)
-
Standard Configuration Weight: 3.0 kg (6.61 lb) including handle, mounting rings, and dovetail plate
-
Rear Interfaces:
-
M64x0.75 to M54x0.75
-
M54×0.75 to M54x0.75
-
M54x0.75 to M48x0.75 (built-in M48x0.75 filter thread)
-
-
Interface of the Three-Stage Imaging Adapter: M48x0.75
-
Notes: *Focus can be achieved within a back focus range of 32.5–82.5 mm, measured from the M54–M48 interface shoulder
Important FF70 Diagrams
Optical Layout
Mechnical Diagram
Star Field Map
Other Information
- Country of Manufacture: China
| Manufacturer | ZWO Astronomy Cameras |
|---|---|
| Telescope Focal Length | 401 - 500mm |
- 1x FF70 APO optical tube
- 1x Photographic extension tube
- 1x User manual
- 1x Inspection sheet
- 1x Warranty card
ZWO FF70 f/7 APO Quadruplet Refractor Telescope