Choosing a quadruplet refractor for astrophotography involves balancing optical quality, aperture size, and budget. The Askar 130PHQ stands out as the best overall for its combination of high-quality optics and versatile features. For those seeking a compact yet capable option, the Askar 60F offers excellent portability. If premium quality is your goal, the Askar 80PHQ delivers superior image clarity at a higher price point. The main tradeoffs involve size, weight, and cost, with larger apertures providing more light-gathering power but also increasing complexity and expense. Keep reading for a detailed breakdown of each model to find the perfect fit for your astrophotography needs.
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Key Takeaways
- Aperture size is the primary factor influencing light-gathering and image detail, with larger apertures generally offering better image quality.
- Optical design quality, such as air-spaced quadruplet configurations, significantly impacts color correction and image sharpness.
- Portability varies widely; smaller refractors like the 50mm models excel in lightweight setups, while larger ones demand more substantial mounts.
- Price often correlates with optical quality and features, but some mid-range options provide excellent value for serious amateurs.
- Built-in features like flat-field correction and dovetail plates can streamline astrophotography setups, but they may add to the cost.
| quadruplet refractor for astrophotography | Aperture | Focal Length | Focal Ratio | Optical Design |
|---|---|---|---|---|
| Askar 50P Telescope | 50mm | 190mm | f/3.8 | Quadruplet Petzval APO |
| Askar 130PHQ Flatfield Astrogr | 130mm | 1000mm | f/7.7 | — |
| Askar 80PHQ Telescope | 80mm | 600mm | f/7.5 | — |
| Askar 71F Flat-Field Telescope | 71mm | 230mm | f/6.9 | Quadruplet air-spaced APO |
| Askar 60F Flat-Field Telescope | 60mm | 408mm | F6.8 | Quadruplet ED Glass Refractor |
More Details on Our Top Picks
Askar 50P Telescope, 50mm Aperture F3.8 SD Glass Refractor OTA, Quadruplet APO Astrograph, 160mm Vixen Dovetail Plate
The Askar 50P stands out for its remarkably lightweight and portable design, making it ideal for astrophotographers who need a travel-friendly setup. Its quadruplet APO optical system delivers sharp images with minimal chromatic aberration, comparable to larger astrographs like the Askar 130PHQ, but in a much smaller package. This makes it a great choice for those focused on wide-field deep-sky imaging without the hassle of heavy equipment. A key tradeoff is its limited aperture, which restricts its ability to capture very faint objects compared to larger options. It’s best suited for astrophotographers who prioritize mobility and quick setup over deep-sky object size or high-magnification imaging.
Pros:- Extremely lightweight and portable for travel or field use
- High-quality quadruplet APO optics with excellent image clarity
- Supports APS-C sensors without additional correctors
- Multiple accessory mounting options
Cons:- Limited aperture size restricts deep-sky performance
- Primarily designed for astrophotography, less suitable for casual visual observation
Best for: Beginners or travelers seeking a lightweight, high-quality quadruplet refractor for deep-sky astrophotography on the go
Not ideal for: Users aiming for high-magnification planetary imaging or those needing to photograph very faint deep sky objects with large aperture
- Aperture:50mm
- Focal Length:190mm
- Focal Ratio:f/3.8
- Optical Design:Quadruplet Petzval APO
- Glass Element:SD glass
- Dovetail Plate:160mm Vixen
Our verdict“This pick is perfect for astrophotographers who need a compact, high-performance quadruplet refractor for travel and wide-field deep-sky imaging.”
Askar 130PHQ Flatfield Astrograph Telescope, 130mm Aperture, F/7.7, Quadruplet Air-Spaced APO Refractor for Deep Sky Astrophotography and Visual Astronomy
The Askar 130PHQ makes a compelling case as the most versatile option in this lineup, combining a sizable 130mm aperture with a well-controlled focal ratio of f/7.7. Its quadruplet ED glass design rivals larger astrographs like the Askar 107PHQ in chromatic correction, but adds the advantage of a larger aperture for capturing fainter objects. The self-flattening optical design ensures sharp, flat images across medium-sized sensors, simplifying the astrophotographer’s workflow. However, its increased size and weight mean it is less portable, and some users might find it requires additional accessories like a focal reducer to optimize imaging speed. This model is suited for dedicated astrophotographers who want a high-quality, adaptable astrograph capable of excellent deep-sky results.
Pros:- Large 130mm aperture for capturing faint objects
- Excellent chromatic correction with quadruplet ED lens
- Self-flattening design reduces post-processing work
- Focal reducer option for faster imaging
Cons:- Heavier and bulkier than smaller refractors
- Requires additional accessories like focal reducers for optimal performance
Best for: Intermediate to advanced astrophotographers seeking a robust, flatfield-capable astrograph for deep sky imaging
Not ideal for: Travelers or casual users who prioritize portability or quick setup over maximum aperture and versatility
- Aperture:130mm
- Focal Ratio:f/7.7
- Focal Length:1000mm
- Lens Type:Quadruplet air-Spaced APO
- Glass Type:ED Glass
- Mount Compatibility:Losmandy dovetail
Our verdict“This model is ideal for serious astrophotographers seeking a high-performance, flatfield astrograph with versatile imaging options.”
Askar 80PHQ Telescope, Aperture 80mm, F7.5, Quadruplet Astrograph, Flatfield Super APO, for Deep Sky Astrophotography and Visual Astronomy
The Askar 80PHQ offers a balanced blend of optical excellence and user-friendliness, making it a strong choice for those new to quadruplet astrographs or looking for a versatile setup. Its 80mm aperture with a focal ratio of f/7.5 provides a good compromise between field of view and image detail, similar to the 107PHQ but with a more manageable size. Its quadruplet ED lens reduces chromatic aberration effectively, and the integrated flatfield design minimizes optical distortions—eliminating the need for additional field flatteners. While it’s less capable of high-magnification imaging than larger models, it offers an easier learning curve and quick setup, especially with its comprehensive package features. It’s best for hobbyists seeking quality without complexity.
Pros:- Good balance of size and optical quality
- Supports both astrophotography and visual use
- Built-in flatfield correction reduces optical distortions
- Includes comprehensive accessories for immediate setup
Cons:- Limited aperture for very faint objects
- May be less suitable for high-magnification planetary imaging
Best for: Beginners or hobbyists wanting a straightforward, high-quality quadruplet astrograph for deep sky imaging without extensive additional equipment
Not ideal for: Users aiming for high-magnification planetary imaging or those requiring extremely deep-sky capabilities with large objects
- Aperture:80mm
- Focal Ratio:f/7.5
- Focal Length:600mm
- Lens Configuration:Quadruplet air-spaced APO
- Included Accessories:Adapters, tube rings, Vixen dovetail, aluminum case
Our verdict“This telescope suits hobbyists and beginners seeking a reliable, flatfield-capable quadruplet refractor for versatile deep-sky imaging.”
Askar 71F Flat-Field Telescope, 71mm Aperture F6.9 ED Glass Refractor OTA, Quadruplet Air-Spaced APO, 230mm Vixen Dovetail Plate
The Askar 71F emphasizes portability without sacrificing optical quality, making it an excellent choice for those wanting a lightweight quadruplet refractor for both astrophotography and visual observation. Its 71mm aperture and F6.9 focal ratio strike a good balance for wide-field imaging and scenic views. Its quadruplet ED lens system effectively reduces chromatic aberration, comparable to the larger 80PHQ, but with a more compact form factor. The flat-field design helps produce sharp, distortion-free images across the frame, although some users may find its smaller aperture limiting for very faint deep-sky objects. This telescope is best for enthusiasts seeking a lightweight, versatile, high-quality refractor for general astrophotography and observing.
Pros:- Very lightweight and portable for easy transport
- High-quality ED glass reduces chromatic aberration
- Flat-field design ensures sharp images across the frame
- Suitable for both imaging and visual applications
Cons:- Limited aperture size restricts deep-sky faint object capture
- Focus adjustment may require careful handling for precision
Best for: Amateur astronomers looking for a portable, high-performance quadruplet refractor suitable for both imaging and visual use
Not ideal for: Deep-sky astrophotographers requiring large apertures for faint objects or high-magnification planetary imaging
- Aperture:71mm
- Focal Ratio:f/6.9
- Focal Length:230mm
- Optical Design:Quadruplet air-spaced APO
- Dovetail Plate:Vixen
Our verdict“This telescope is well-suited for portable, versatile astrophotography and visual astronomy for enthusiasts prioritizing ease of use.”
Askar 60F Flat-Field Telescope, 60mm Aperture F6.8 ED Glass Refractor OTA for Astrophotography and Visual Astronomy
The Askar 60F stands out for its impressive combination of a high-quality quadruplet ED glass optical design and built-in field flattener, making it a strong contender for those who want sharp, color-corrected images in a portable package. Compared with the Askar 50P, which offers a smaller aperture but a faster focal ratio, the 60F provides a more balanced approach for general astrophotography, especially when handling bright objects and wide-field imaging. Its lightweight and compact form make it ideal for fieldwork, but the limited aperture size might restrict its ability to capture faint deep-sky targets. The need for additional accessories like a mount and camera adapters can complicate setup for beginners. Overall, this model makes the most sense for visual astronomers who want to dip into astrophotography without lugging heavy gear, but less so for those aiming at deep-sky imaging of faint galaxies.
Pros:- High-quality quadruplet ED glass design minimizes chromatic aberration
- Built-in field flattener simplifies astrophotography setup
- Lightweight and portable, easy to transport
- Compatible with a wide range of cameras and accessories
Cons:- Limited aperture size restricts deep-sky imaging of faint objects
- Additional accessories needed for full astrophotography setup
- Potential complexity for beginners unfamiliar with telescope accessories
Best for: Astrophotographers seeking a portable, high-quality quadruplet refractor for wide-field imaging and visual observation.
Not ideal for: Deep-sky imagers focused on faint nebulae or galaxies that require larger apertures for sufficient light gathering.
- Aperture:60mm
- Focal Length:408mm
- Focal Ratio:F6.8
- Optical Design:Quadruplet ED Glass Refractor
- Dovetail Plate:Vixen
- Compatibility:DSLRs, astrophotography cameras
- Filter Thread:2″
- Adapters:M48×0.75, M54×0.75
Our verdict“This telescope is ideal for astrophotographers who prioritize portability and image quality over deep-sky light-gathering power.”
How We Picked
The products in this roundup were selected based on their optical design, aperture size, build quality, and suitability for astrophotography. Priority was given to quadruplet apochromatic configurations due to their superior color correction and sharpness. We also evaluated overall value, portability, and user feedback, ensuring these options cater to a range of experience levels and budgets. The ranking reflects a balance between performance, ease of use, and price, with the top picks offering the best combination of these factors for astrophotographers seeking high-quality images.| quadruplet refractor for astrophotography | Focal Ratio | Optical Design |
|---|---|---|
| Askar 50P Telescope | f/3.8 | Quadruplet Petzval APO |
| Askar 130PHQ Flatfield Astrogr | f/7.7 | — |
| Askar 80PHQ Telescope | f/7.5 | — |
| Askar 71F Flat-Field Telescope | f/6.9 | Quadruplet air-spaced APO |
| Askar 60F Flat-Field Telescope | F6.8 | Quadruplet ED Glass Refractor |
Factors to Consider When Choosing Quadruplet Refractor For Astrophotography
When choosing a quadruplet refractor for astrophotography, several key factors can influence your overall experience and results. Understanding optical quality, mount compatibility, portability, and budget constraints will help you make an informed decision. Beyond specifications, consider your specific goals—whether capturing deep-sky objects or wide-field landscapes—and how they affect your choice. Being aware of common pitfalls, like underestimating weight or overestimating your mount’s capacity, can prevent costly mistakes. Use this guide to weigh these considerations carefully before making your purchase.Optical Design and Aperture
The optical design, especially the quadruplet configuration, directly affects image quality, chromatic aberration, and color correction. Larger apertures allow for more detailed and brighter images, essential for deep-sky astrophotography. However, bigger telescopes tend to be heavier and more expensive, which can limit portability and compatibility with mounts. Striking a balance between aperture and weight is key, especially if you plan to travel or set up frequently. Remember, a high-quality quadruplet can outperform a larger, lower-quality lens in producing sharper, more accurate images.
Portability and Mount Compatibility
Portability is often overlooked but crucial—especially if you plan to transport your setup. Smaller refractors, like the 50mm and 60mm models, excel in lightweight portability, making them ideal for fieldwork or travel. Larger apertures, such as the 130mm models, require sturdier mounts and more space, which can increase setup complexity. Ensure your mount can handle the weight and size of your chosen refractor, as an incompatible mount can cause vibrations and compromise image quality. Consider whether you prefer a compact system for ease of transport or a larger, more capable telescope for ultimate detail.
Build Quality and Durability
Robust build quality ensures consistent optical performance and longevity. High-quality materials, precision machining, and tight tolerances in the lens elements contribute to better image correction and durability. Cheaper models might use inferior coatings or less precise assembly, leading to issues like chromatic aberration or inconsistent focus. For astrophotography, where stability and minimal optical distortions are critical, investing in a well-constructed refractor can pay dividends. However, premium models often come with increased maintenance requirements and higher costs, so consider your willingness to care for your equipment.
Budget and Value
Price varies widely among quadruplet refractors, often reflecting optical quality, size, and feature set. While high-end models offer superb images, mid-range options frequently deliver excellent value for dedicated amateur astronomers. Avoid overextending your budget on features you won’t use, but also recognize that saving too much may lead to compromises in optical performance. Think about long-term investment—spending more initially on a quality refractor can reduce frustration and upgrade expenses later. Carefully assess whether the added cost aligns with your intended level of astrophotography and future goals.
Additional Features and Accessories
Features like flat-field correction, adjustable focusers, and dovetail plates can streamline your astrophotography workflow. Flat-field correction ensures your images are free from field curvature and distortion, especially important for wide-field shots. Adjustable focusers improve precision, which is vital for stacking multiple images. Compatibility with standard mounts and accessories also matters—consider whether your chosen refractor includes or can support filters, cameras, and guiding systems. While these extras can enhance performance, they often add to the overall cost, so prioritize features that directly improve your imaging results.
Frequently Asked Questions
Is a quadruplet refractor better than a triplet for astrophotography?
Yes, in general, quadruplet refractors tend to provide superior color correction and sharper images compared to triplet designs, especially for astrophotography. The additional lens element in a quadruplet configuration helps reduce chromatic aberration and improves image contrast. However, they are often more expensive and heavier, so if budget or portability are primary concerns, a high-quality triplet might suffice. For those seeking the best possible image quality and willing to handle the extra weight and cost, a quadruplet is usually the better choice.
How important is aperture size for astrophotography in these refractors?
Aperture size is a critical factor because it determines how much light the telescope can gather. Larger apertures enable the capture of more detail and brighter images, especially vital for deep-sky objects like nebulae and galaxies. However, bigger telescopes are also heavier and more demanding on mounts, which can affect stability and ease of use. For most astrophotographers, balancing aperture with portability and mount capacity is key. Smaller apertures might limit detail but can be more manageable for beginners or those with lighter mounts.
Should I prioritize a flat-field design in my quadruplet refractor?
Absolutely, if your goal is wide-field astrophotography or capturing large objects, a flat-field design can significantly improve image quality by reducing field curvature and edge distortions. Many premium quadruplet refractors include built-in flat-field correction, which simplifies post-processing and enhances overall sharpness. However, these features often come at a higher price, so consider whether your typical astrophotography targets benefit from a flat-field correction. For planetary or small-object imaging, flat-field correction is less critical.
Can I use these telescopes for visual astronomy as well?
Many quadruplet refractors excel in both astrophotography and visual use, thanks to their high optical quality and minimal chromatic aberration. Smaller models like the 50mm or 60mm are particularly portable and easy to handle for quick visual sessions. Larger models provide brighter views with sharper details, ideal for observing deep-sky objects and star clusters. Keep in mind that some specialized astrophotography features may be less relevant for visual use, so choose a model that balances both needs if you plan to switch between imaging and visual observation.
Conclusion
The Askar 130PHQ emerges as the best overall choice for dedicated astrophotographers seeking high performance across a range of targets. For newcomers or those prioritizing portability, the Askar 60F offers excellent value without sacrificing too much optical quality. The Askar 80PHQ suits users willing to invest in top-tier image clarity and detailed deep-sky imaging. If budget is a primary concern, mid-range options provide impressive results without breaking the bank. For advanced users demanding premium features, a larger, meticulously built quadruplet refractor will deliver the best possible images with proper care.
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