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797 EUR
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price without VAT: 648 EUR
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The ZWO FF70 APO is a compact apochromatic astrograph with a 70 mm aperture and a 490 mm focal length. The optical tube has been designed as a flat-field quadruplet APO refractor, intended both for astrophotography and visual observation. The optical system consists of four air-spaced elements, including one ED glass element, which helps reduce chromatic aberration and provides a well-corrected image field.
The built-in flat-field correction eliminates the need for a separate field flattener. The telescope offers a 44 mm image circle, allowing it to work with full-frame cameras. Unlike systems using an external field corrector, the FF70 APO does not require one rigidly defined working distance such as 55 mm. After assembling the optical train, focus is achieved within the focuser travel range and the permitted rear connection length.
The FF70 APO is equipped with a 2.4" rack-and-pinion focuser with a 1:10 microfocuser and a 360° rotator, making it easier to frame the object without rotating the entire setup. The retractable dew shield reduces the tube length during transport, while the quick-release tube rings with a carrying handle make telescope installation and removal easier. The tube also includes finder/accessory mounting points and a 230 mm dovetail plate.
• four-element apochromatic optical system with air-spaced elements
• one ED glass element
• 70 mm aperture and 490 mm focal length
• f/7.0 focal ratio
• built-in flat-field correction
• no additional field flattener required
• 44 mm image circle, suitable for full-frame sensors
• no rigid 55 mm backfocus requirement typical of external field correctors
• 2.4" rack-and-pinion focuser with 1:10 microfocuser
• 360° rotator for precise frame adjustment
• retractable dew shield with locking screw
• quick-release tube rings
• carrying handle on the tube rings
• 230 mm dovetail plate
• photographic adapters with M54 × 0.75 and M48 × 0.75 threads
• M48 × 0.75 filter thread in the photographic adapter
• suitable for astronomical cameras, DSLR cameras, mirrorless cameras and visual setups
• ZWO FF70 APO optical tube
• tube rings
• carrying handle
• 230 mm dovetail plate
• photographic extension tube with adapters
• user manual
• warranty card
• quality control card
• manufacturer: ZWO
• model: FF70 APO
• telescope type: flat-field apochromatic astrograph
• optical design: quadruplet APO with air-spaced elements
• number of optical elements: 4
• ED glass: one ED lens
• objective diameter: 70 mm
• focal length: 490 mm
• focal ratio: f/7.0
• image circle: 44 mm
• full-frame support: yes
• focuser: 2.4" rack-and-pinion, dual-speed
• microfocuser: 1:10
• rotator: 360°
• maximum optical path length in imaging mode: 82.5 mm from the base of the M48 × 0.75 thread; 100.5 mm from the base of the M54 × 0.75 thread
• maximum optical path length in visual mode: 117 mm from the end of the 1.25" holder; 127 mm from the end of the 2" holder
• total length with 1.25" adapter and retracted dew shield: 372.5 mm
• total length with 1.25" adapter and extended dew shield: 430.9 mm
• total length with photographic adapter and retracted dew shield: 415 mm
• total length with photographic adapter and extended dew shield: 473.4 mm
• rear threads / adapters: M64 × 0.75 to M54 × 0.75; M54 × 0.75 to M54 × 0.75; M54 × 0.75 to M48 × 0.75
• filter thread: M48 × 0.75 in the M48 adapter
• dovetail plate length: 230 mm
• optical tube net weight: 2.5 kg
• weight with tube rings, handle and dovetail plate: 3.0 kg
The ZWO FF70 APO combines compact dimensions, full-frame field correction and a convenient adapter system. It works well as a mobile astrograph for deep-sky imaging and as a small refractor for visual observation.
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