Askar 111f
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Askar 111f
$1,499.00
Askar 111F Flat-Field Quadruplet Refractor
- Explore the sky with the Askar 111F Flat-Field Quadruplet Refractor, a versatile self-flattened astrograph designed for both visual observing and astrophotography.
- Features a 111mm aperture, 766mm focal length, and native f/6.9 focal ratio, making it a capable all-around telescope for deep-sky imaging, observing, and even daytime photography.
- Built with a quadruplet air-spaced APO optical design, using three front elements and one rear element, including one ED glass element to help reduce chromatic aberration and improve image clarity.
- Supports full-frame imaging with a generous 44mm image circle, delivering sharp, refined stars across the frame without requiring a separate field flattener.
- The self-flattened design allows users to connect imaging accessories, reach focus, and start shooting without calculating back focus or purchasing an additional flattener.
- Includes a photographic extension tube with a 2-inch filter thread, plus M48x0.75 and M54x0.75 adapters for broad compatibility with DSLR cameras and dedicated astronomy cameras.
- Built-in internal baffling helps block stray light and improve contrast, giving astrophotographers cleaner, more detailed results.
- Equipped with a smooth 3-inch rack-and-pinion dual-speed focuser with 1:10 fine adjustment, helping users achieve precise focus for high-quality imaging and observation.
- Rear 360-degree graduated rotator allows accurate camera angle adjustment, making framing and composition easier during astrophotography sessions.
- Retractable lens hood shortens the telescope for easier storage and transport while keeping the setup sleek and travel-friendly.
- CNC-machined tube construction and the classic Askar F-series blue and white finish give the telescope a clean, premium look with dependable build quality.
- The handle includes a finder base slot, and both sides of the focuser also feature finder bases, giving users flexible mounting options for finder scopes and accessories.
- Includes a long 300mm Vixen-style dovetail plate with 1/4-inch and 3/8-inch screw holes, allowing direct connection to compatible tripods and mounts.
- A strong choice for astrophotographers and observers looking for a cost-effective, full-frame-ready, flat-field refractor with premium usability right out of the box.
Specifications
- Product Type: Flat-field quadruplet refractor / self-flattened astrograph
- Brand: Askar
- Model: 111F
- Aperture: 111mm
- Focal Length: 766mm
- Focal Ratio: f/6.9
- Objective Lens: Quadruplet air-spaced APO, including one ED glass element
- Optical Design: Three elements in front, one element in rear
- Image Circle: 44mm
- Full-Frame Support: Yes
- Field Flattener Required: No, self-flattened design
- Built-In Baffle: Yes
- Focuser: 3-inch rack-and-pinion dual-speed focuser
- Fine Focus Adjustment: 1:10
- Focuser Travel: 30mm
- Camera Rotator: 360-degree graduated rotator
- Lens Hood: Retractable
- Dovetail Plate: 300mm Vixen-style dovetail
- Tripod Mounting Threads: 1/4-inch and 3/8-inch screw holes
- Rear-End Thread Types: M78x1 to M54x0.75, M54x0.75 to M54x0.75, M54x0.75 to M48x0.75
- Filter Thread: M48x0.75 adapter with 2-inch filter thread
- Photographic Adapter Support: M48x0.75 and M54x0.75
- Net Weight: 5.74kg
- Gross Weight with Tube Ring and Dovetail Plate: 6.76kg
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Maximum Accessory Connection with Focuser Fully Retracted, Imaging Mode:
- 73mm from the base of the M48x0.75 male thread
- 91mm from the base of the M54x0.75 male thread
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Maximum Accessory Connection with Focuser Fully Retracted, Observing Mode:
- 132mm from the end of the 1.25-inch eyepiece holder
- 142mm from the end of the 2-inch eyepiece holder
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Minimum Accessory Connection with Focuser Fully Extended, Imaging Mode:
- 43mm from the base of the M48x0.75 male thread
- 61mm from the base of the M54x0.75 male thread
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Minimum Accessory Connection with Focuser Fully Extended, Observing Mode:
- 102mm from the end of the 1.25-inch eyepiece holder
- 112mm from the end of the 2-inch eyepiece holder
- Total Length with 1.25-Inch Adapter and Dew Shield Contracted: 664mm
- Total Length with 1.25-Inch Adapter and Dew Shield Fully Extended: 751mm
- Total Length with Photographic Adapter and Dew Shield Contracted: 728mm
- Total Length with Photographic Adapter and Dew Shield Fully Extended: 815mm
- Recommended Use: Astrophotography, visual astronomy, deep-sky imaging, full-frame imaging, and daytime photography
What's in the box?
- Askar 111F OTA
- Pair of tube rings
- Handle
- 300mm Vixen dovetail plate
- Set of photographic adapters
