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Diagonals
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  8. SVBONY SV188P 2-inch…
SVBONY

SVBONY SV188P 2-inch 90° Dielectric Mirror Diagonal 650g (22.9 oz) | 99% Reflectivity for Bright, Clear Views

4.7
(32 Ratings)
SVBONY SV188P 2-inch 90° Dielectric Mirror Diagonal 650g (22.9 oz) | 99% Reflectivity for Bright, Clear Views - main product image
All-inclusive price — duties & taxes paid, no customs charges at delivery
₹13,292₹14,679

You save ₹1,387 (9%)

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SVBONY SV188P 2-inch 90° Dielectric Mirror Diagonal 650g (22.9 oz) | 99% Reflectivity for Bright, Clear Views — red
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₹8,374
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SVBONY SV188P 2-inch 90° Dielectric Mirror Diagonal 650g (22.9 oz) | 99% Reflectivity for Bright, Clear Views — 2 inch
2 inch
₹13,292
₹14,679
In Stock

Doorstep delivery by 23 Oct - 25 Oct from USA

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See the Cosmos with Unrivaled Clarity

About this item

The SVBONY SV188P 2-inch dielectric mirror diagonal is engineered for superior astronomical observation. It features 99% reflectivity dielectric coatings, offering enhanced brightness and clarity compared to standard aluminum coatings. This diagonal provides a comfortable 90-degree viewing angle, presenting an upright image to reduce processing steps and improve observation comfort. Imported from authorized US retailers, all customs and GST duties are pre-paid, ensuring a transparent landed price.

Designed for versatility, this diagonal accepts 2-inch telescopes and eyepieces, supports 2-inch filter installation, and includes a 2-inch to 1.25-inch converter. The brass compression ring securely locks eyepieces without damaging their surfaces, while internal baffling and matte velvet lining effectively eliminate stray light for a pristine image. The aluminum alloy construction ensures durability and a premium feel.

Compared to basic mirror diagonals, the SVBONY SV188P offers significantly higher reflectivity and better light baffling for a more immersive viewing experience. Delivered via ExpressBox tracked shipping, it provides a reliable upgrade for your telescope setup.

Key Features

  • SV188P diagonal uses a high-reflective dielectric coating; more durable and more reflective than enhanced aluminum coating; reflectivity is up to 99%; for maximum field of view brightness and clarity
  • 2-inch dielectric mirror diagonal; suitable for 2-inch telescopes and eyepieces; supports 2-inch filter installation; comes with a 2-inch to 1.25-inch converter; can be connected to 1.25-inch eyepieces; barlow and other telescope accessories
  • 90 degree viewing angle; provides a more comfortable viewing angle to observe the starry sky above; provides an upright image; comfortable observation; reducing the steps of post-image processing
  • Star diagonal adopts a side screw locking design; there is a brass pressure ring inside the barrel; so that the eyepiece surface will not be damaged when locking the eyepiece; it has an eyepiece anti-contact block design; better protect your eyepiece from damage
  • The interior of the SV188P has been specially treated to eliminate stray light; spray matte paint; the side burgundy cover is made of aluminum plate; and matte velvet is attached; it can effectively eliminate stray light; get a bright image
  • The diagonal is made of aluminum alloy; the lens uses a high-precision plane mirror with a 1/4 wavelength error; and the surface is coated with a dielectric film with a reflectivity of up to 99% to improve the performance of the reflector; the surface of the lens barrel is treated with black bright oxidation; beautiful and generous

Why choose this product

Precision Optics for Enhanced Stargazing

The SVBONY SV188P diagonal utilizes advanced dielectric coatings, achieving up to 99% reflectivity. This significantly boosts image brightness and contrast, revealing finer details in nebulae, galaxies, and planetary surfaces. Unlike basic mirror diagonals, its precision construction minimizes optical aberrations and stray light, ensuring a sharp, clear, and comfortable viewing experience. Imported directly from authorized US retailers, it represents a commitment to quality optics for discerning astronomers.

Ideal for Indian Astronomers & Who Should Consider Alternatives

This diagonal is perfect for amateur astronomers in India seeking to upgrade their telescope's optical performance for clearer, brighter views of celestial objects, especially during clear nights. Its 90-degree angle offers comfort for observing high-altitude targets. Those who already own a high-end dielectric diagonal with superior coatings or require a specific focal length eyepiece might not see a significant upgrade. Beginners should ensure their telescope has a 2-inch focuser or is compatible with the included adapter.

How to use

  • Attach to Telescope — Remove your telescope's existing eyepiece and diagonal (if any). Insert the 2-inch barrel of the SVBONY SV188P diagonal into the telescope's focuser. Secure it gently with the focuser's thumbscrew.
  • Insert Eyepiece — If using a 1.25-inch eyepiece, first insert the provided converter into the diagonal's 2-inch opening. Then, insert your chosen eyepiece into the diagonal (or converter) and secure it with the brass compression ring.
  • Focus and Observe — Point your telescope at a celestial object. Use your telescope's focuser to achieve a sharp image. The 90° angle and upright image provide a comfortable viewing experience.

Example scenarios

Typical situations where SVBONY SV188P 2-inch 90° Dielectric Mirror Diagonal 650g (22.9 oz) | 99% Reflectivity for Bright helps — illustrative scenarios, not customer reviews.

1
Scenario 1
Illustrative example
Where it helps

An amateur astronomer in a light-polluted Indian city wants to observe the moon and planets with their existing 2-inch telescope.

How this product helps

The SVBONY SV188P diagonal's 99% reflectivity and stray light baffling will significantly improve image contrast and detail, making lunar craters and planetary features more visible even with ambient light. The 90° angle offers comfortable viewing from balconies or terraces.

2
Scenario 2
Illustrative example
Where it helps

A beginner astronomer in India has a telescope with a 1.25-inch focuser and wants to upgrade their viewing experience with a higher-quality diagonal.

How this product helps

This diagonal includes a 2-inch to 1.25-inch converter, allowing it to be used with their current setup. The dielectric mirror provides a noticeable improvement in brightness and clarity over standard diagonals, offering a better introduction to deep-sky objects.

Technical specifications

Setup & usage

Compatibility2-inch telescopes and eyepieces; 1.25-inch eyepieces via converter
Filter SupportSupports 2-inch filter installation
InstallationSide screw locking design with brass compression ring
PurposeEnhances viewing comfort and image quality for astronomical observation
Cost per useN/A (Durable accessory)
Shelf life after openingN/A (Durable accessory)
Reapplication mathN/A (Durable accessory)
ContraindicationsEnsure telescope focuser is 2-inch or compatible with adapter
Allergens / common irritantsBrass (potential nickel/zinc content)

How we compare

FeatureSVBONY SV188P 2-inchOthers
Reflectivity99% Dielectric CoatingTypically 90-95% Enhanced Aluminum or Standard Mirror
Image Brightness & ContrastSignificantly higher, clearer, and sharperGood, but less detail and contrast
Durability & Eyepiece ProtectionBrass compression ring, robust aluminum alloyVaries; some may use set screws or less durable materials
Stray Light ControlInternal baffling and matte treatmentOften basic or absent
Cost₹13,292 — ₹13,292 per diagonal₹3,000 - ₹7,000 for comparable dielectric models

Product details

SKUwxy4221
BrandSVBONY
Model NameSV188P (FF9171D)
Item TypeTelescope Diagonal Mirror
Barrel Size2 inch (with 1.25-inch converter)
Viewing Angle90°
ReflectivityUp to 99% Dielectric Coating
Image OrientationUpright
MaterialAluminum Alloy Body, Brass Compression Ring
Internal TreatmentStray Light Baffling, Matte Paint, Matte Velvet
Lens Error1/4 Wavelength
Weight650 grams (1.43 lb)
Dimensions4.4 x 2.4 x 3.3 inches (11.2 x 6.1 x 8.4 cm)
Country of OriginNot stated by manufacturer — US retail version, sourced from authorized US retailers and authorized brand partners

About SVBONY

SVBONY specializes in high-quality telescope accessories, offering advanced optics and durable construction for amateur astronomers worldwide.

Compliance & Legal

No product-specific compliance warnings identified. Standard imported-goods terms apply: customs duties & GST paid; for personal use in India; follow the manufacturer's usage instructions on the packaging.

Customer Reviews

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FAQ, See What Others Asked

How do I know if this SVBONY diagonal will fit my telescope?
This SVBONY SV188P diagonal is designed for 2-inch telescope focusers and eyepieces. It includes a converter to also accept standard 1.25-inch eyepieces and accessories. Check your telescope's focuser size; if it accepts 2-inch barrels, this diagonal will fit directly. If your focuser is 1.25-inch, use the provided adapter.
What is the benefit of a dielectric mirror diagonal over a standard one?
A dielectric mirror diagonal uses specialized coatings that reflect up to 99% of light, significantly increasing image brightness and contrast compared to standard aluminum coatings which reflect around 90-95%. This means finer details are visible, especially for faint deep-sky objects, and the image appears sharper and clearer.
Does this diagonal provide an upright image for terrestrial viewing?
Yes, the SVBONY SV188P diagonal provides an upright image, making it suitable for comfortable terrestrial observation as well as astronomical viewing. This feature simplifies aiming and observation, especially for targets high in the sky.
How does the brass compression ring protect my eyepieces?
The brass compression ring gently secures your eyepiece in place without scratching or damaging its surface, unlike set screws that can create pressure points. This ensures the longevity and integrity of your valuable eyepieces.
Can I use filters with this SVBONY diagonal?
Yes, this 2-inch diagonal supports the installation of 2-inch telescope filters. This allows you to enhance contrast, block light pollution, or observe specific wavelengths of light for more detailed astronomical viewing.
How does the stray light baffling improve image quality?
The interior of the SVBONY SV188P is treated with matte paint and velvet to absorb stray light. This prevents internal reflections and glare, resulting in a darker background and higher contrast images, making faint celestial objects stand out more clearly.
How to buy an original SVBONY telescope diagonal in India?
To buy an original SVBONY telescope diagonal in India, purchase from authorized US retailers and authorized brand partners like crowcrowcrow. This ensures you receive a factory-sealed, authentic product imported per-order with all customs and GST duties included, delivered via ExpressBox tracked shipping.

Frequently bought together

SVBONY SV188P 2-inch 90° Dielectric Mirror Diagonal 650g (22.9 oz) | 99% Reflectivity for Bright, Clear Views

This item:

SVBONY SV188P 2-inch 90° Dielectric Mirror Diagonal 650g (22.9 oz) | 99% Reflectivity for Bright, Clear Views

₹13,292

SVBONY SV188P 2-inch 90° Dielectric Mirror Diagonal 650g (22.9 oz) | 99% Reflectivity for Bright, Clear Views

This item

SVBONY SV188P 2-inch 90° Dielectric Mirror Diagonal 650g (22.9 oz) | 99% Reflectivity for Bright, Clear Views

₹13,292

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₹28,676

You save ₹9,481 (25%) Extra

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3 items

₹28,676

You save ₹9,481 (25%) Extra

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Rating
4.70(32)
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Brand NameSVBONYSVBONYCelestronTYHJSaipomorUHamnYoqanr
SourceUS RetailUS RetailUS RetailUS RetailUS RetailUS RetailUS Retail
Sold ByCrowCrowCrowCrowCrowCrowCrowCrowCrowCrowCrowCrowCrowCrowCrowCrowCrowCrowCrowCrowCrow
Imported from USA
₹13,292₹14,679

You Save ₹1,387

Estimated delivery: Doorstep delivery by 23 Oct - 25 Oct from USA
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