Askar 71F
Explore the Universe with the Askar 71F Quadruplet Flat-Field Astrograph Optimal Optical Design: Features a quadruplet air-spaced APO lens with one piece of ED glass, effectively reducing chromatic aberration and...
Explore the Universe with the
Askar 71F Quadruplet Flat-Field Astrograph
- Optimal Optical Design: Features a quadruplet air-spaced APO lens with one piece of ED glass, effectively reducing chromatic aberration and supporting 44mm full-frame imaging.
- Self-Flattened Convenience: The Askar 71F eliminates the need for additional flatteners or complex back focus calculations, simplifying the setup for astrophotography.
- Lightweight and Portable: Weighing only 2.5kg (OTA) and 3kg with tube rings and dovetail plate, it's designed for easy transport and setup, perfect for adventurers.
- Dual Usage: Equipped for both visual observations and astrophotography, enhancing its utility for all users.
- Visual Observation Accessories Included: Comes with an 8mm eyepiece (60x magnification), a 20mm eyepiece (25x magnification), and a 1.25-inch 45° erecting prism for correct image orientation.
- Enhanced Connectivity: Includes a photographic extension tube with M480.75 and M540.75 adapters, plus a built-in 2-inch filter thread for seamless attachment of various cameras.
- Advanced Mechanical Design: Features a retractable dew shield for compact storage, CNC machined tube for durability, and matting paint inside the dew shield to minimize light reflections.
- Versatile Mounting Options: Comes with a standard 230mm Vixen dovetail plate with slots for 1/4 and 3/8 screw holes, allowing easy tripod attachment.
- Aesthetic and Functional: The sleek blue and white color scheme enhances its visual appeal, complemented by practical features like dual finder bases and a multifunctional handle with a finder base slot.
- Precision Focuser: Equipped with a dual-speed R&P 2.4-inch focuser, featuring a 1:10 fine adjustment and a 360° scale field rotator for accurate alignment.
The Askar 71F stands as a pinnacle of affordability and performance, ideal for both the seasoned astronomer and the amateur looking to delve deeper into the cosmos with ease.
Specifications
71F |
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Aperture size |
71mm |
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Focal length |
490mm |
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Focal ratio |
f/6.9 |
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Objective lens |
Quadruplet air-spaced APO(including one ED glass) |
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Image circle |
44mm |
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Maximum accessory connection (with the focuser fully retreated) |
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Observing mode: |
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Total length |
372.5mm(including 1.25" adapter as dew shield contracted） |
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Net weight |
2.5kg |
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Gross weight(Including tube ring&dovetail plate） |
3.0kg |
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Rear-end thread type: |
M64×0.75-M54×0.75 |
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Standard package items |
A 71F OTA， a pair of tube rings, a handle, a Vixen 230mm dovetail plate, a set of photographic adapters, a 1.25" 45° erecting prism, an 8mm eyepiece, a 20mm eyepiece |
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Connection Diagram
Locking Screw Diagram
Software and Docs
After Market Focuser Installation
