The ZWO FF90 APO Flat-Field 90mm Apochromatic Refractor is a high-quality telescope designed for serious deep-sky imaging. With a 90 mm aperture and f/6.8 focal length, it provides a 44 mm full-frame image circle, making it suitable for a range of applications. The four-element air-spaced APO design ensures clean stars across the whole sensor, and the telescope's native flat field eliminates the need for a flattener or complex spacing calculations. The FF90 APO weighs 3.92 kg and 4.52 kg with rings and dovetail, making it a portable option for astrography. The ZWO FF Series is designed with a focus on ease of use, allowing you to attach your camera, reach focus, and start imaging quickly and easily.
The ZWO FF90 APO Flat-Field 90mm Apochromatic Refractor is a high-quality telescope designed for serious deep-sky imaging. With a 90 mm aperture and f/6.8 focal length, it provides a 44 mm full-frame image circle, making it suitable for a range of applications. The four-element air-spaced APO design ensures clean stars across the whole sensor, and the telescope's native flat field eliminates the need for a flattener or complex spacing calculations. The FF90 APO weighs 3.92 kg and 4.52 kg with rings and dovetail, making it a portable option for astrography. The ZWO FF Series is designed with a focus on ease of use, allowing you to attach your camera, reach focus, and start imaging quickly and easily.
in 14 offers
The lowest price for ZWO FF90 APO Flat-Field Apochromatic Refractor Telescope right now is $1,431.73 at Camera Concepts & Telescope Solutions, compared across 9 retailers.
The all-time low was $1,382.91 on 9 Sept 2026 — today's price is 4% above the lowest ever. This is at or near its all-time low — a good time to buy.
ZWO FF90 APO Flat-Field Apochromatic Refractor Telescope
The ZWO FF90 APO Flat-Field 90mm Apochromatic Refractor is a high-quality telescope designed for serious deep-sky imaging. With a 90 mm aperture and f/6.8 focal length, it provides a 44 mm full-frame image circle, making it suitable for a range of applications. The four-element air-spaced APO design ensures clean stars across the whole sensor, and the telescope's native flat field eliminates the need for a flattener or complex spacing calculations. The FF90 APO weighs 3.92 kg and 4.52 kg with rings and dovetail, making it a portable option for astrography. The ZWO FF Series is designed with a focus on ease of use, allowing you to attach your camera, reach focus, and start imaging quickly and easily.
The ZWO FF90 APO Flat-Field 90mm Apochromatic Refractor is a high-quality telescope designed for serious deep-sky imaging. With a 90 mm aperture and f/6.8 focal length, it provides a 44 mm full-frame image circle, making it suitable for a range of applications. The four-element air-spaced APO design ensures clean stars across the whole sensor, and the telescope's native flat field eliminates the need for a flattener or complex spacing calculations. The FF90 APO weighs 3.92 kg and 4.52 kg with rings and dovetail, making it a portable option for astrography. The ZWO FF Series is designed with a focus on ease of use, allowing you to attach your camera, reach focus, and start imaging quickly and easily.
Prices last updated 3 Nov 2026.
Last updated at 03/11/2026 12:03:38
ZWO ZWO FF90 APO Flat-Field Apochromatic Refractor
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ZWO FF90 APO Flat-Field 90mm Apochromatic Refractor, 90mm Aperture, 44mm Image Circle, 3.92kg Optical Tube
Delivery between 4–13 Nov $25
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Delivery between 6–11 Nov $28.60
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Delivery between 5–12 Nov $10.30
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Delivery between 6–11 Nov $30.20
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ZWO FF90 APO OTA - 90mm 609mm F6.8 Flat-Field Apochromatic Refractor
Free delivery between Wed – Sat
| Type | Refractor |
| Camera-adaptable | Yes |
| Brand | ZWO |
| Focal Ratio | f/6.8 |
| Weight | 4.5 kg |
ZWO ZWO FF90 APO Flat-Field Apochromatic Refractor
ZWO FF90-APO 90mm Quadruplet Refractor F/6.8
ZWO FF90 APO Flat-Field 90mm Apochromatic Refractor, 90mm Aperture, 44mm Image Circle, 3.92kg Optical Tube
Delivery between 4–13 Nov $25
ZWO FF90 APO Flat-Field Aprochromatic Refractor Telescope
Delivery between 6–11 Nov $28.60
ZWO FF90 f/6.8 APO REFRACTOR | Testar Australia
Delivery between 5–12 Nov $10.30
| Type | Refractor |
| Camera-adaptable | Yes |
| Brand | ZWO |
| Focal Ratio | f/6.8 |
| Weight | 4.5 kg |
