Baader H-alpha Narrowband Filter 6.5nm
When will I receive it?
Products marked In stock are dispatched promptly — the exact delivery estimate for your address is shown at checkout, before you confirm the order.
For international shipments, delivery times depend on the destination and are always displayed at checkout before payment.
Products marked Available on order require 5–15 business days for processing. Our team will keep you updated promptly if anything changes.
What are the warranty terms?
Shop with confidence: all our products include a 24-month legal warranty for conformity defects, managed directly by our team.
Many brands also offer extended warranty coverage beyond 24 months — contact us to find out the specific terms for the product you're interested in.
Click here for more information.
Can I return a product?
Yes: you have 14 days from delivery to return any product and receive a full refund — see our Refund Policy for full details.
Items must be returned in their original condition and packaging. Return shipping costs are the customer's responsibility.
Not sure which product is right for you? Contact us before buying — we'll help you find the perfect instrument so you won't need to return anything.
Sei un'azienda? Compila il modulo per la fatturazione
Clicca sul pulsante qui sotto per inserire i tuoi dati aziendali:
Vai al moduloThe Baader H-alpha Narrowband Filter 6.5nm is the CMOS-optimized narrowband filter for high-contrast imaging of emission nebulae, isolating the H-alpha line at 656.3nm.
What it's for
The H-alpha filter passes light at 656nm, the best choice for high-contrast narrowband astrophotography, capable of revealing the richest nebula details even in areas with strong light pollution. With a 6.5nm FWHM passband, it's optimized for optical systems from f/10 to f/3.5 — the vast majority of amateur telescopes in use.
Baader CMOS-Optimized technology
The filter is coated with Reflex-Blocker™ treatment, which eliminates unwanted reflections even in the presence of auxiliary optics, and with Life-Coat™ technology: a hardened coating that does not flake, does not degrade and lasts the filter's entire lifetime even under the most extreme conditions. The edges are blackened all around, with a visual indicator on the front side for correct orientation during mounting. The filter is individually polished and coated, with no exposed coating edges.
Available formats
Available in 7 formats: 1¼" (31.8mm), 2" (50.8mm), 31mm, 36mm, 50.4mm, 50×50mm and 65×65mm.
Technical specifications
| Parameter | Value |
|---|---|
| Type | H-alpha Narrowband |
| Central wavelength | 656.3 nm |
| Bandwidth (FWHM) | 6.5 nm |
| Recommended optical systems | f/10 to f/3.5 |
| Filter thickness | 2 mm |
| Coating | Reflex-Blocker™, Life-Coat™ |
| Brand | Baader Planetarium |
Who it's for
Ideal for astrophotographers who want to purchase the individual filters of the SHO palette separately (for example to complete or replace an existing set), or for those who photograph exclusively H-alpha emission nebulae without needing O-III or S-II. Compatible with filter wheels and most mono CMOS cameras for astrophotography.