Askar 203 APO 203mm f/7 Triplet Refractor Telescope
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- 203 mm (8") Aperture for excellent light gathering and resolution
- 1421 mm Focal Length at f/7 for detailed imaging and observing
- Triplet APO Optics with one ED glass element
- 3.5" Dual-Speed Focuser with 360° rotation
- Retractable Tube & Dew Shield for easier transport and storage
- Heavy-Duty Mounting System with triple rings and Losmandy dovetail
- Compatible with 1x Flattener and 0.8x Reducer/Flattener (separately sold)
Askar 203APO: High-Quality Triplet Astrograph
The Askar 203APO is a large-aperture refractor built for serious astrophotography and visual observing. Its 203 mm aperture, 1421 mm focal length, and f/7 triplet APO design with ED glass deliver impressive light-gathering power, resolution, contrast, and color correction. Despite its size, a retractable lens tube and dew shield improve portability, while the robust mounting system and 3.5-inch dual-speed focuser provide the stability and precision needed for demanding imaging setups.
Triplet APO Design
The Askar 203APO features a 203 mm aperture, 1421 mm focal length, and f/7 focal ratio, providing 20% more effective aperture area than the 185APO and a limiting magnitude of 13.3. Its large aperture delivers greater light-gathering power, resolution, brightness, and contrast for revealing finer celestial detail. A triplet air-spaced APO design with one ED glass element provides strong chromatic aberration correction for sharper details and more accurate color.
Thoughtful Features
Despite its large aperture, the Askar 203APO incorporates several features to make mounting and handling more manageable. Its retractable lens tube reduces the OTA to just 45.1 in (1145 mm), with an OTA weight of 40.8 lb (18.5 kg) and 51.8 lb (23.5 kg) including the handle, tube rings, and dovetail. Reinforced triple tube rings provide a secure mounting platform, while the 15.8 in (402 mm) slotted handle doubles as an accessory mounting point. An extended 19.7 in (500 mm) Losmandy dovetail offers broad mount compatibility and greater flexibility for balancing, while the retractable rear tube maintains optical alignment and locks securely in place.
Precision Focusing
The Askar 203APO is built for flexible visual observing and precise focusing. Extend the lens tube for use with a diagonal and eyepiece, or retract it for binoviewer compatibility. Its large 3.5-inch dual-speed rack-and-pinion focuser provides 3.9 in (100 mm) of travel, a precision scale, and compatibility with most motorized focusers. Dual finder bases provide additional accessory mounting points, while the 360° precision rotator makes framing adjustments easy and secure. A 1.25"/2" adapter supports common diagonals and eyepieces, and the CNC-machined focuser features internal anti-reflective treatment to help reduce stray light. Mount, diagonal, and binoviewers images are not included with this telescope purchase.
Optical Path Diagram
The Askar 203APO optical layout illustrates its triplet air-spaced APO design, including an ED glass element for enhanced chromatic aberration correction. The diagram shows how incoming light is precisely focused to produce sharp, well-corrected images with accurate color.
Specifications
- Aperture: 203 mm (8.0 in)
- Focal Length: 1421 mm
- Focal Ratio: f/7
- Optical Design: Triplet Air-Spaced APO
- ED Glass: One ED Glass Element
- Limiting Magnitude: 13.3
- Available Backfocus: 335 mm (13.2 in) from the 1.25 in eyepiece adapter with focuser fully racked in
- Focuser: 3.5 in Dual-Speed Rack-and-Pinion
- Focuser Travel: 100 mm (3.9 in)
- Focuser Rotation: 360° Precision Rotator
- Finder Bases: 2
- Visual Adapter: 2 in / 1.25 in
- Retractable Rear Tube Travel: 150 mm (5.9 in)
- Retracted OTA Length: 1145 mm (45.1 in) with dew shield retracted
- Handle Length: 402 mm (15.8 in)
- Dovetail: Losmandy-Style
- Dovetail Length: 500 mm (19.7 in)
- Tube Rings: Reinforced Triple-Ring Design
- OTA Weight: 18.5 kg (40.8 lb)
- Total Weight: 23.5 kg (51.8 lb), including handle, tube rings, and dovetail plate
- Construction: CNC-Machined Optical Tube with Anodized and Painted Surfaces
203APO Performance with Optional Correctors
203APO Dimensional Diagrams
Other Information
- Country of Manufacture: China
Askar 203APO: High-Quality Triplet Astrograph
The Askar 203APO is a large-aperture refractor built for serious astrophotography and visual observing. Its 203 mm aperture, 1421 mm focal length, and f/7 triplet APO design with ED glass deliver impressive light-gathering power, resolution, contrast, and color correction. Despite its size, a retractable lens tube and dew shield improve portability, while the robust mounting system and 3.5-inch dual-speed focuser provide the stability and precision needed for demanding imaging setups.
Triplet APO Design
The Askar 203APO features a 203 mm aperture, 1421 mm focal length, and f/7 focal ratio, providing 20% more effective aperture area than the 185APO and a limiting magnitude of 13.3. Its large aperture delivers greater light-gathering power, resolution, brightness, and contrast for revealing finer celestial detail. A triplet air-spaced APO design with one ED glass element provides strong chromatic aberration correction for sharper details and more accurate color.
Thoughtful Features
Despite its large aperture, the Askar 203APO incorporates several features to make mounting and handling more manageable. Its retractable lens tube reduces the OTA to just 45.1 in (1145 mm), with an OTA weight of 40.8 lb (18.5 kg) and 51.8 lb (23.5 kg) including the handle, tube rings, and dovetail. Reinforced triple tube rings provide a secure mounting platform, while the 15.8 in (402 mm) slotted handle doubles as an accessory mounting point. An extended 19.7 in (500 mm) Losmandy dovetail offers broad mount compatibility and greater flexibility for balancing, while the retractable rear tube maintains optical alignment and locks securely in place.
Precision Focusing
The Askar 203APO is built for flexible visual observing and precise focusing. Extend the lens tube for use with a diagonal and eyepiece, or retract it for binoviewer compatibility. Its large 3.5-inch dual-speed rack-and-pinion focuser provides 3.9 in (100 mm) of travel, a precision scale, and compatibility with most motorized focusers. Dual finder bases provide additional accessory mounting points, while the 360° precision rotator makes framing adjustments easy and secure. A 1.25"/2" adapter supports common diagonals and eyepieces, and the CNC-machined focuser features internal anti-reflective treatment to help reduce stray light. Mount, diagonal, and binoviewers images are not included with this telescope purchase.
Optical Path Diagram
The Askar 203APO optical layout illustrates its triplet air-spaced APO design, including an ED glass element for enhanced chromatic aberration correction. The diagram shows how incoming light is precisely focused to produce sharp, well-corrected images with accurate color.
Specifications
- Aperture: 203 mm (8.0 in)
- Focal Length: 1421 mm
- Focal Ratio: f/7
- Optical Design: Triplet Air-Spaced APO
- ED Glass: One ED Glass Element
- Limiting Magnitude: 13.3
- Available Backfocus: 335 mm (13.2 in) from the 1.25 in eyepiece adapter with focuser fully racked in
- Focuser: 3.5 in Dual-Speed Rack-and-Pinion
- Focuser Travel: 100 mm (3.9 in)
- Focuser Rotation: 360° Precision Rotator
- Finder Bases: 2
- Visual Adapter: 2 in / 1.25 in
- Retractable Rear Tube Travel: 150 mm (5.9 in)
- Retracted OTA Length: 1145 mm (45.1 in) with dew shield retracted
- Handle Length: 402 mm (15.8 in)
- Dovetail: Losmandy-Style
- Dovetail Length: 500 mm (19.7 in)
- Tube Rings: Reinforced Triple-Ring Design
- OTA Weight: 18.5 kg (40.8 lb)
- Total Weight: 23.5 kg (51.8 lb), including handle, tube rings, and dovetail plate
- Construction: CNC-Machined Optical Tube with Anodized and Painted Surfaces
203APO Performance with Optional Correctors
203APO Dimensional Diagrams
| Manufacturer | Askar |
|---|---|
| Telescope Focal Length | 1251 - 1500mm |
- 1x Askar 203 APO OTA
- 1x Group of tube rings
- 1x Handle
- 1x Askar 500mm Losmandy dovetail plate
- 1x Aluminum box
- 1x Manual
- 203 mm (8") Aperture for excellent light gathering and resolution
- 1421 mm Focal Length at f/7 for detailed imaging and observing
- Triplet APO Optics with one ED glass element
- 3.5" Dual-Speed Focuser with 360° rotation
- Retractable Tube & Dew Shield for easier transport and storage
- Heavy-Duty Mounting System with triple rings and Losmandy dovetail
- Compatible with 1x Flattener and 0.8x Reducer/Flattener (separately sold)
Askar 203APO: High-Quality Triplet Astrograph
The Askar 203APO is a large-aperture refractor built for serious astrophotography and visual observing. Its 203 mm aperture, 1421 mm focal length, and f/7 triplet APO design with ED glass deliver impressive light-gathering power, resolution, contrast, and color correction. Despite its size, a retractable lens tube and dew shield improve portability, while the robust mounting system and 3.5-inch dual-speed focuser provide the stability and precision needed for demanding imaging setups.
Triplet APO Design
The Askar 203APO features a 203 mm aperture, 1421 mm focal length, and f/7 focal ratio, providing 20% more effective aperture area than the 185APO and a limiting magnitude of 13.3. Its large aperture delivers greater light-gathering power, resolution, brightness, and contrast for revealing finer celestial detail. A triplet air-spaced APO design with one ED glass element provides strong chromatic aberration correction for sharper details and more accurate color.
Thoughtful Features
Despite its large aperture, the Askar 203APO incorporates several features to make mounting and handling more manageable. Its retractable lens tube reduces the OTA to just 45.1 in (1145 mm), with an OTA weight of 40.8 lb (18.5 kg) and 51.8 lb (23.5 kg) including the handle, tube rings, and dovetail. Reinforced triple tube rings provide a secure mounting platform, while the 15.8 in (402 mm) slotted handle doubles as an accessory mounting point. An extended 19.7 in (500 mm) Losmandy dovetail offers broad mount compatibility and greater flexibility for balancing, while the retractable rear tube maintains optical alignment and locks securely in place.
Precision Focusing
The Askar 203APO is built for flexible visual observing and precise focusing. Extend the lens tube for use with a diagonal and eyepiece, or retract it for binoviewer compatibility. Its large 3.5-inch dual-speed rack-and-pinion focuser provides 3.9 in (100 mm) of travel, a precision scale, and compatibility with most motorized focusers. Dual finder bases provide additional accessory mounting points, while the 360° precision rotator makes framing adjustments easy and secure. A 1.25"/2" adapter supports common diagonals and eyepieces, and the CNC-machined focuser features internal anti-reflective treatment to help reduce stray light. Mount, diagonal, and binoviewers images are not included with this telescope purchase.
Optical Path Diagram
The Askar 203APO optical layout illustrates its triplet air-spaced APO design, including an ED glass element for enhanced chromatic aberration correction. The diagram shows how incoming light is precisely focused to produce sharp, well-corrected images with accurate color.
Specifications
- Aperture: 203 mm (8.0 in)
- Focal Length: 1421 mm
- Focal Ratio: f/7
- Optical Design: Triplet Air-Spaced APO
- ED Glass: One ED Glass Element
- Limiting Magnitude: 13.3
- Available Backfocus: 335 mm (13.2 in) from the 1.25 in eyepiece adapter with focuser fully racked in
- Focuser: 3.5 in Dual-Speed Rack-and-Pinion
- Focuser Travel: 100 mm (3.9 in)
- Focuser Rotation: 360° Precision Rotator
- Finder Bases: 2
- Visual Adapter: 2 in / 1.25 in
- Retractable Rear Tube Travel: 150 mm (5.9 in)
- Retracted OTA Length: 1145 mm (45.1 in) with dew shield retracted
- Handle Length: 402 mm (15.8 in)
- Dovetail: Losmandy-Style
- Dovetail Length: 500 mm (19.7 in)
- Tube Rings: Reinforced Triple-Ring Design
- OTA Weight: 18.5 kg (40.8 lb)
- Total Weight: 23.5 kg (51.8 lb), including handle, tube rings, and dovetail plate
- Construction: CNC-Machined Optical Tube with Anodized and Painted Surfaces
203APO Performance with Optional Correctors
203APO Dimensional Diagrams
Other Information
- Country of Manufacture: China
| Manufacturer | Askar |
|---|---|
| Telescope Focal Length | 1251 - 1500mm |
- 1x Askar 203 APO OTA
- 1x Group of tube rings
- 1x Handle
- 1x Askar 500mm Losmandy dovetail plate
- 1x Aluminum box
- 1x Manual
Askar 203 APO 203mm f/7 Triplet Refractor Telescope