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1855 EUR
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price without VAT: 1508 EUR
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The ZWO FF110 APO is a flat-field apochromatic astrograph with a 110 mm aperture, 766 mm focal length and f/7.0 focal ratio. The optical tube has been designed for deep-sky astrophotography and visual observation. The quadruplet APO optical system consists of four air-spaced elements, including one ED glass element, and provides image correction across a 44 mm full-frame field.
The FF110 APO includes built-in flat-field correction, so it does not require an additional field flattener. After attaching a camera or another imaging setup, focus is achieved within the focuser travel range. This is not a system requiring a classic, rigid 55 mm distance typical of external field correctors. The effective optical path length range in imaging mode is 42-73 mm from the M48 × 0.75 thread or 60-91 mm from the M54 × 0.75 thread.
The telescope is equipped with a solid 3" rack-and-pinion focuser with a 1:10 microfocuser, an integrated 360° rotator and a rear photographic adapter system with M78, M54 and M48 threads. The retractable dew shield reduces the setup length during transport, while internal baffles suppress stray light. The tube includes quick-release tube rings, a carrying handle and a 300 mm Vixen dovetail plate.
• four-element apochromatic optical system with air-spaced elements
• one ED glass element
• 3+1 optical design - three elements in the front and one element at the rear of the system
• 110 mm aperture and 766 mm focal length
• f/7.0 focal ratio
• integrated 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
• internal baffles suppressing stray light
• retractable dew shield with locking screw
• 3" rack-and-pinion focuser with 1:10 microfocuser
• 360° rotator for precise framing
• photographic adapters with M78 × 1, M54 × 0.75 and M48 × 0.75 threads
• possibility of mounting 2" filters in the M48 × 0.75 adapter
• 1.25"/2" visual adapter for visual observation
• dual finder scope / accessory mounting system
• carrying handle on the tube rings
• quick-release tube rings
• 300 mm Vixen dovetail plate
• 1/4"-20 and 3/8"-16 holes in the dovetail plate
• focuser mounting holes prepared for electric focuser bracket installation
• compatible with astronomical cameras, OAG, filter drawer, focal plane adjuster, DSLR cameras and mirrorless cameras
• ZWO FF110 APO optical tube
• pair of tube rings
• carrying handle
• 300 mm Vixen dovetail plate
• four-section photographic adapter set
• user manual
• warranty card
• quality control card
• manufacturer: ZWO
• model: FF110 APO
• telescope type: flat-field apochromatic astrograph
• optical design: quadruplet APO with air-spaced elements
• lens arrangement: 3 elements in the front and 1 element at the rear
• number of optical elements: 4
• ED glass: one ED lens
• objective diameter: 110 mm
• focal length: 766 mm
• focal ratio: f/7.0
• image circle: 44 mm
• full-frame support: yes
• focuser: 3" rack-and-pinion, dual-speed
• microfocuser: 1:10
• focuser travel: 31 mm
• rotator: 360°
• optical path length range in imaging mode: 42-73 mm from the base of the M48 × 0.75 thread; 60-91 mm from the base of the M54 × 0.75 thread
• optical path length range in visual mode: 101-132 mm from the end of the 1.25" holder; 111-142 mm from the end of the 2" holder
• total length with 1.25" adapter and retracted dew shield: 664 mm
• total length with 1.25" adapter and extended dew shield: 751 mm
• total length with photographic adapter and retracted dew shield: 728 mm
• total length with photographic adapter and extended dew shield: 815 mm
• dew shield extension length: 87 mm
• outer diameter of the lens cap: 148 mm
• outer diameter of the dew shield: 143 mm
• outer diameter of the tube section behind the dew shield: 125 mm
• rear threads / adapters: M78 × 1 - 55 mm adapter; M78 × 1 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: 300 mm
• dovetail standard: Vixen
• optical tube net weight: 5.74 kg
• weight with tube rings, handle and dovetail plate: 6.76 kg
The ZWO FF110 APO combines larger aperture, full-frame field correction, a solid 3" focuser and a convenient adapter system. It is a universal optical tube for astrophotographers who need a larger image scale than smaller refractors can provide, while still using a ready-made flat-field optical system without an additional flattener.
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