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1858 EUR
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price without VAT: 1510 EUR
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 Shop online:
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Shop in Warsaw (qty): 1
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The Askar 111F Flat-Field 111/766 mm f/6.9 Quadruplet air-spaced APO is a four-element apochromatic astrograph with built-in flat-field correction, designed for astrophotography as well as visual observing. Its quadruplet design eliminates the need for an additional flattener and, after focusing, does not require the fixed working distance typical of external correctors. The telescope provides a 44 mm image circle, making it suitable for use with full-frame cameras.
• four-element air-spaced apochromatic optical system with one ED glass element
• integrated flat-field correction - no additional flattener required
• 44 mm image circle suitable for full-frame sensors
• no need to maintain the traditional backfocus distance required by external field correctors
• internal baffles to reduce stray light
• retractable dew shield with locking screw
• 3" rack-and-pinion focuser with 1:10 fine adjustment
• 360° rotator with scale and locking screw
• photographic adapters with M54 × 0.75 and M48 × 0.75 threads
• 2" filter mounting option in the M48 × 0.75 adapter
• 1.25"/2" visual adapter for visual observing
• carrying handle with finder base slot
• additional finder bases on both sides of the focuser
• 300 mm Vixen-style dovetail plate
• 1/4" and 3/8" tripod mounting holes in the dovetail plate
• compatible with astronomy cameras, DSLR cameras, mirrorless cameras, OAG, filter drawer and M48 extension tubes
• Askar 111F optical tube assembly
• pair of tube rings
• carrying handle
• 300 mm Vixen-style dovetail plate
• set of photographic adapters
• manufacturer: Askar
• model: 111F Flat-Field
• telescope type: flat-field apochromatic astrograph
• optical design: quadruplet air-spaced APO
• number of optical elements: 4
• ED glass: one ED element
• aperture: 111 mm
• focal length: 766 mm
• focal ratio: f/6.9
• image circle: 44 mm
• full-frame support: yes
• focuser: 3" dual-speed R&P focuser
• fine adjustment: 1:10
• focuser travel: 30 mm
• rotator: 360° with scale
• rear threads / adapters: 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 / 2"
• accessory connection range in imaging mode: 43-73 mm from the base of the M48 × 0.75 thread; 61-91 mm from the base of the M54 × 0.75 thread
• accessory connection range in visual mode: 102-132 mm from the end of the 1.25" eyepiece holder; 112-142 mm from the end of the 2" eyepiece 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
• outside diameter of the lens cap: 148 mm
• outside diameter of the dew shield: 143 mm
• outside diameter of the main tube: 125 mm
• dovetail plate length: 300 mm
• dovetail standard: Vixen-style
• mounting holes in the dovetail plate: 1/4" and 3/8"
• OTA net weight: 5.74 kg
• weight with tube rings and dovetail plate: 6.76 kg
The Askar 111F Flat-Field combines full-frame field correction, a practical adapter system and a solid focuser, making it suitable as a deep-sky imaging astrograph and a telescope for visual use.
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