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header-product DIELECTRIC mirror bevel socket DO-GSO 90° 2" STD201
119.49 €

DIELECTRIC mirror bevel socket DO-GSO 90° 2" STD201

DO-GSO 90° 2" Dielectric Mirror Socket STD201 Photo 1

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DIELECTRIC mirror bevel socket DO-GSO 90° 2" STD201

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Short description

The DO-GSO 90° 2" dielectric mirror bevel socket is a precision optical accessory designed for telescopes. It provides a 90-degree viewing angle for comfortable observations and features a high-reflectivity dielectric coating to maximize light transmission and image brightness. Ideal for upgrading astronomical setups.
Available for order: 5 pcs.
Warranty: 2 Years
SKU: 12769393
Manufacturer: No name
free shipment

Cheapest delivery:

Unisend LV

Pick-up points

Unisend LV

Cost

1.99 €

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Customer service center
2b. Kengaraga str., Riga, Latvia, LV-1063
24.11.2026 {{selectedOffer.officeDeliveryString}}
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Courier Delivery Please note that in case of a large parcel additional delivery costs may apply!
27.11.2026 {{selectedOffer.courierDeliveryString}}
From 4.99 € (Weight: 1.72 kg)
Parcel couriers
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27.11.2026 {{selectedOffer.parcelStationDeliveryString}}
From 1.99 €
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36 months installment: from 3.32 euros per month
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Product information

Description

The DIELECTRIC mirror bevel socket DO-GSO 90° 2" STD201 is a precision optical accessory designed for telescopes, offering a comfortable 90-degree viewing angle for astronomical observations.

Advantages

This dielectric mirror bevel socket significantly enhances optical performance by utilizing a high-reflectivity dielectric coating that maximizes light transmission and ensures brighter, clearer images. Built for durability and precision, it serves as a reliable upgrade for various telescope configurations, reducing neck strain during long viewing sessions by positioning the eyepiece at a right angle.

Suitable for

  • Amateur and advanced astronomers upgrading their telescope setups
  • Observing the Moon, planets, and deep-sky objects with increased image brightness
  • Improving viewing ergonomics during extended night sky observation sessions

When it may not be suitable

This product may not be suitable for telescope optical systems that require specific backfocus distances that cannot accommodate a 2-inch star diagonal. It is also not designed for terrestrial viewing setups where an upright, correct-image erecting prism is strictly required.

Key specifications

  • Accessory type: Dielectric mirror bevel socket / star diagonal
  • Viewing angle: 90 degrees
  • Barrel size: 2 inches
  • Coating: High-reflectivity dielectric coating

How to use

Insert the 2-inch barrel of the dielectric mirror bevel socket securely into the telescope's focuser and lock it in place using the thumbscrews. Next, insert your compatible 2-inch telescope eyepiece or adapter into the socket receiver and secure it firmly. Adjust the telescope focuser until a sharp and clear image is achieved.

What to consider before purchase

  • Ensure your telescope focuser is compatible with 2-inch accessories
  • Check available backfocus travel to confirm the diagonal will reach focus
  • Verify that your observational goals align with a 90-degree standard mirror diagonal
Make sure to store the mirror socket in a dry, dust-free environment with protective caps attached when not in use, and clean the optical surfaces only with specialized optical cleaning tools to preserve the dielectric coating.

Description

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Product comparison

The optical accessory DIELECTRIC mirror bevel socket DO-GSO 90° 2" STD201 is compared with several alternative solutions from the same brand: DO-GSO SCT 90° 2" Dielectric Star Diagonal Mirror Socket, Coma corrector DO-GSO 2-inch for telescopes, Focal Reducer DO-GSO 0.5x 2", and DO-GSO 1.25-inch Prismatic 90-Degree Right Angle Socket for Telescopes. All of them are designed to upgrade astronomical setups and improve viewing experiences, but they serve entirely different optical functions.

⚙️ The table below compares the accessory type, viewing angle, barrel size, and primary purpose of each product.

Comparison parameterDIELECTRIC mirror bevel socket DO-GSO 90° 2" STD201DO-GSO SCT 90° 2" Dielectric Star Diagonal Mirror SocketComa corrector DO-GSO 2-inch for telescopesFocal Reducer DO-GSO 0.5x 2"DO-GSO 1.25-inch Prismatic 90-Degree Right Angle Socket for TelescopesPractical significance
Device typeDielectric mirror diagonalDielectric mirror diagonal for SCTComa correctorFocal reducerPrismatic diagonalEach accessory performs a distinct optical task in the telescope light path.
Viewing angle90 degrees90 degreesNot applicableNot applicable90 degreesDiagonal mirrors and prisms provide a comfortable viewing angle for overhead objects.
Barrel size2 inches2 inches2 inches2 inches1.25 inchesThe size determines compatibility with standard focusers and eyepieces.
PurposeComfortable angled viewing and bright image transmissionDesigned for Schmidt-Cassegrain telescopesEliminating optical aberrations (coma) in Newtonian telescopesDecreasing focal length and increasing the field of viewComfortable viewing for smaller standard accessoriesSelection depends on the telescope optical design and observation goals.

◎ The table below evaluates which product is most suitable for different user needs and observation scenarios.

Use caseRecommended productWhy
Comfortable visual observation at an angle with general-purpose telescopesDIELECTRIC mirror bevel socket DO-GSO 90° 2" STD201Provides a standard comfortable viewing angle and maximizes light transmission via a dielectric coating.
Working with Schmidt-Cassegrain optical systemsDO-GSO SCT 90° 2" Dielectric Star Diagonal Mirror SocketSpecifically tailored for threaded or dedicated attachment on SCT telescopes.
Correcting edge distortion in Newtonian reflectorsComa corrector DO-GSO 2-inch for telescopesEffectively eliminates coma aberrations to ensure sharp star images across the frame.
Capturing wide celestial vistas and reducing exposure timesFocal Reducer DO-GSO 0.5x 2"Decreases the focal length to deliver wider panoramic views and faster imaging.
Using with older or compact 1.25-inch eyepiecesDO-GSO 1.25-inch Prismatic 90-Degree Right Angle Socket for TelescopesPerfectly fits 1.25-inch focusers while maintaining a classic right-angle view.
The DIELECTRIC mirror bevel socket DO-GSO 90° 2" STD201 differs from the alternatives by functioning as a classic 2-inch diagonal mirror with a high-reflectivity dielectric coating, tailored for comfortable zenith observations with high light throughput. It is most suitable for owners of 2-inch systems who prioritize comfortable viewing angles and maximum image brightness, whereas alternative products should be chosen when correcting coma, altering focal lengths, mounting on SCT telescopes, or using 1.25-inch accessories.
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Customer reviews

Customer questions

FAQ

How much does the DO-GSO 90° 2" Dielectric Mirror Socket STD201 cost, and is it available for purchase?

The price is 119.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 5 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 24.11.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay, Installment. All transactions are 100% secure and encrypted.

Can DO-GSO 90° 2" Dielectric Mirror Socket STD201 be purchased with a lease?

Yes, the purchase is available both on credit and with an interest-free installment plan. We work with leading banks and leasing companies in Latvia, allowing you to make your purchase on convenient terms — with a minimal down payment and a repayment period from 3 to 36 months. You can apply for credit or installments for the DO-GSO 90° 2" Dielectric Mirror Socket STD201 online, and the application process is as simple as possible:
  • Select the product on the website and add it to your cart;
  • When placing your order, choose the payment method “Installments”;
  • Fill in the required details for the lending partner;
  • Receive a decision within a few minutes.
For more information about available payment options, interest-free installment terms, and credit conditions in Latvia, please visit the Payment page.

Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

What is the warranty period?

All No name products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized No name service centers and through AiO.lv

Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. We will assist with consultation, warranty claim processing, and coordination with certified service centers.
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