# O-III 6.5nm 2" narrowband filter, Explore Scientific

**URL:** https://aio.lv/en/product--oem-0310100--11023206
**Data updated:** 2026-03-20 09:47 (EET)
**Category:** Telescopes
**Manufacturer:** OEM
**Manufacturer code:** 0310100
**EAN:** 4007922072760
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 227.49 €
**Prices and availability valid until:** 2026-07-14 23:59
**Price without VAT (21%):** 188.01 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--oem-0310100--11023206

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 25.06.2026 | free |
| Pickup points | 30.06.2026 | 1.99 EUR |
| Courier delivery to door | 30.06.2026 | 4.99 EUR |

## Summary description

Explore Scientific O-III 6.5nm 2" narrowband filter isolates the doubly ionized oxygen emission lines for enhanced contrast in planetary nebulae and certain emission nebulae. Designed as a 2-inch (50.8 mm) eyepiece/diagonal-mounted filter with 6.5 nm bandwidth, it reduces broadband skyglow and increases visibility of O-III rich details for visual observing and imaging.

## Long description

Explore Scientific O-III 6.5nm 2" narrowband filter isolates the doubly ionized oxygen (O-III) emission lines to improve contrast and detail when observing planetary nebulae and select emission nebulae. This 2-inch (50.8 mm) eyepiece/diagonal-mounted filter features a 6.5 nm full width at half maximum (FWHM) bandwidth that suppresses broadband skyglow and continuum light while transmitting the O-III lines, making it suitable for both visual observing and astrophotography with small- to medium-aperture telescopes.
Advantages
The O-III 6.5nm filter provides significant contrast improvement on O-III rich targets by sharply narrowing the transmitted band to the relevant emission wavelengths while blocking much of the surrounding light pollution and moonlight. Its 2-inch format allows direct use in eyepiece holders and star diagonals, offering convenience for switching between unaided and filtered views. The filter’s bandwidth balances transmission of the nebular lines with effective suppression of background sky, which benefits both visual perception and long-exposure imaging.
Suitable for
 Visual observation of planetary nebulae and compact emission nebulae
 Imaging nebulae where O-III emission is dominant or significant
 Use on 2" eyepiece holders, star diagonals, and visual/imaging setups with small- to medium-aperture telescopes
Key specifications
 Filter type: O-III (doubly ionized oxygen) narrowband
 Clear aperture: 2 inches (50.8 mm)
 Bandwidth (FWHM): 6.5 nm
 Mounting: 2" eyepiece/diagonal mount compatible
 Primary use: visual observing and astrophotography on appropriate targets
How to use
Insert the 2" O-III filter into a 2" eyepiece holder or star diagonal between the telescope and eyepiece. For visual use, allow your eyes a few minutes to adapt when switching to the filtered view to perceive increased nebular contrast. For imaging, secure the filter in the optical path and verify focus, as narrowband filters can shift optimal focus slightly compared with broadband views. Exposure times and processing should be adjusted to account for reduced overall flux when using the narrow 6.5 nm bandwidth.
Usage recommendations
Best results are achieved on nebulae with strong O-III emission such as planetary nebulae and portions of some emission nebulae. Use with moderate to dark skies or during moonlit nights to improve target contrast against skyglow. When imaging, combine with appropriate calibration frames and consider longer exposures or stacking to compensate for lower transmitted flux.

## FAQ

### How much does the Explore Scientific O-III 6.5nm 2" filter cost, and is it available for purchase?

The price is 227.49 € (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 25.06.2026 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 Explore Scientific O-III 6.5nm 2" filter 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/11023206/65906435_large.webp