Pegasus Astro Hydrogen Alpha / Ha Narrowband (7nm) Imaging Filter - 2" Mounted
Ships by Next Business Day
Contiguous US Customers:
All items we sell ship for free within the Contiguous US. Shipping will be via the cheapest shipping method which will vary depending on the items in your order. During checkout, you may also be shown other optional faster shipping choices.
US Customers in Hawaii and Alaska:
Free shipping applies to almost all products. A few large telescopes and mounts are excluded from this free shipping offer. For these items, please contact us to obtain a shipping quote before you check out using the online shopping cart.
International Customers:
Free shipping does not apply to international orders. During check-out, you will be presented with several shipping choices and costs. However, the export of some items may be restricted outside the US due to size or manufacturer restrictions.
This narrowband filter has a 7nm bandwidth of light centered on a wavelength of 656nm through, and reducing the transmission of certain wavelengths of light, specifically those produced by artificial light including mercury vapor, and both high and low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow). Better choice of narrowband H-alpha astrophotography filter for highest contrast and revealing subtle nebula details.
- SKU: PEG-FLTR-2M-HA
- Filter Size: 2 inch
- Polish: 1/4 wavefront, Parfocal
- Transmission Range: T >80% 656 nm, 7nm FWHM
- Coatings: Multilayer Anti-reflection
- Type: Narrowband (7nm)
- Shape: Round
- Thickness: 5mm (filter) + 2.5mm (thread)
- Thread: M48, 0.75 pitch
A note about possible halos in narrowband Pegasus filters: Pegasus has extensively tested their narrowband filters and are very satisfied with the result. However, they have observed additional lenses in the optical path or extremely bright stars in the FOV can cause spikes or halos, not related with filter coatings. If you observe or have any concerns with halos in your Pegasus filters, you will need to work directly with Pegasus to discuss the issue. If Pegasus confirms the issue (after communication and troubleshooting with customers) of a filter defect, they will replace the filter.
| Product Banner Type | new |
|---|---|
| Free Shipping Graphic | Free US Shipping |
| Hide Found a better Shipped Price on Frontend? | No |
This narrowband filter has a 7nm bandwidth of light centered on a wavelength of 656nm through, and reducing the transmission of certain wavelengths of light, specifically those produced by artificial light including mercury vapor, and both high and low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow). Better choice of narrowband H-alpha astrophotography filter for highest contrast and revealing subtle nebula details.
- SKU: PEG-FLTR-2M-HA
- Filter Size: 2 inch
- Polish: 1/4 wavefront, Parfocal
- Transmission Range: T >80% 656 nm, 7nm FWHM
- Coatings: Multilayer Anti-reflection
- Type: Narrowband (7nm)
- Shape: Round
- Thickness: 5mm (filter) + 2.5mm (thread)
- Thread: M48, 0.75 pitch
A note about possible halos in narrowband Pegasus filters: Pegasus has extensively tested their narrowband filters and are very satisfied with the result. However, they have observed additional lenses in the optical path or extremely bright stars in the FOV can cause spikes or halos, not related with filter coatings. If you observe or have any concerns with halos in your Pegasus filters, you will need to work directly with Pegasus to discuss the issue. If Pegasus confirms the issue (after communication and troubleshooting with customers) of a filter defect, they will replace the filter.
| Product Banner Type | new |
|---|---|
| Free Shipping Graphic | Free US Shipping |
| Hide Found a better Shipped Price on Frontend? | No |
Pegasus Astro Hydrogen Alpha / Ha Narrowband (7nm) Imaging Filter - 2" Mounted