# Coma Corrector Skywatcher SW-5417 2" — aplanatic 2-inch optical accessory

**URL:** https://aio.lv/en/product--oem-sw-5417--11024654
**Data updated:** 2026-02-24 11:01 (EET)
**Category:** Telescopes
**Manufacturer:** OEM
**Manufacturer code:** SW-5417
**EAN:** 5901691603752
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 344.99 €
**Prices and availability valid until:** 2026-07-18 23:59
**Price without VAT (21%):** 285.12 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--oem-sw-5417--11024654

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 02.07.2026 | free |
| Pickup points | 07.07.2026 | 1.99 EUR |
| Courier delivery to door | 07.07.2026 | 4.99 EUR |

## Summary description

Aplanatic coma corrector Skywatcher SW-5417 2" is an optical accessory designed to reduce coma and improve edge-of-field sharpness for telescopes using 2-inch focuser systems. The SW-5417 provides aberration correction across the field for astrophotography and visual observing, enabling flatter star images and better image quality toward the frame edges. It is suitable for users who need improved wide-field performance and more accurate star shapes.

## Long description

The Coma Corrector Skywatcher SW-5417 2" is an aplanatic optical accessory designed for telescopes with 2-inch focuser systems. It reduces coma and other off-axis aberrations to deliver flatter fields and more accurate star shapes toward the edges of the image. Optimized for both astrophotography and visual observing, this corrector improves image quality across the frame while preserving native focal ratio and maintaining straightforward mechanical integration with standard 2" focusers.
Advantages
This coma corrector provides aplanatic correction that reduces star elongation and improves edge sharpness across a wide field, making it easier to capture usable data from the full sensor area. It is compatible with typical 2-inch focuser setups and does not require complex optical reconfiguration. The design keeps central image quality intact while noticeably improving off-axis performance, which benefits long-exposure imaging and wide-field compositions.
Suitable for
Wide-field astrophotography with refractors and reflectors using a 2" focuser
Visual observing when improved edge sharpness for star fields is required
Imaging where uniform point‑source rendering across the frame is important
Users upgrading their optical train to reduce coma without changing focal ratio
Key specifications
Format: 2-inch barrel compatible with standard 2" focusers
Optical correction: aplanatic coma correction for improved off-axis performance
Application: designed for both photographic and visual use
Field performance: produces flatter field and reduced star elongation toward frame edges
Mechanical: straightforward in-line installation between eyepiece or camera adapter and focuser
How to use
Install the SW-5417 coma corrector into the 2" focuser and secure it in the drawtube following your focuser manufacturer's recommendations. Attach the camera adapter or eyepiece to the corrector's rear cell and adjust back focus according to the telescope and detector combination to achieve optimal focus across the field. For imaging, start with the manufacturer-recommended spacing or use small focus adjustments while observing star shapes near the frame edge to fine-tune correction. For visual use, confirm comfortable focusing and parfocality with eyepieces if swapping between eyepiece and camera setups.
Usage recommendations
To obtain the best results, verify the correct spacing between the telescope focus plane and the camera sensor or eyepiece; small adjustments can significantly affect corner star shapes. Perform test exposures at different focus positions and evaluate star roundness toward the edges. Use the corrector with well-collimated optics and stable mounting to maximize the improvement in wide-field image quality.

## FAQ

### How much does the Coma Corrector Skywatcher SW-5417 2" cost, and is it available for purchase?

The price is 344.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 6 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 02.07.2026 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 Coma Corrector Skywatcher SW-5417 2" be purchased with a lease?

Yes, the purchase is available both on credit and with an interest-free installment plan. Learn more about installments and credit options: https://aio.lv/en/payment#b3

### 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 OEM 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 OEM 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. More information about warranty service: https://aio.lv/en/warranty

## Image

https://aio.lv/img/cache/product/11024654/61681676_large.webp