Altair 2" Premium Narrowband CCD Filter Set
Buying the full SHO set allows significant cost savings as opposed to purchasing the filters separately. In this set, you get:
6.5nm Sii Filter
6.5nm Oiii Filter
7nm Ha Filter
All filters come in a sealed case which is not brittle and is easy to open.
A 6.5nm to 7nm FHWM gives higher contrast compared to say 12nm FHWM filters for better performance within heavily light-polluted urban areas, and higher contrast for imaging faint objects. The emission lines of artificial lighting (mercury (Hg) and sodium (Na) as well as skyglow are completely suppressed, allowing for long exposures in urban conditions. LED lighting outside the filter bandpass is also blocked.
Steep transmission curves with narrow pass-bands give high image contrast. Advanced UV/IR blocking coatings give small star sizes even with refractor optics.
AR (Anti Reflection) coatings suppress halo effects and internal reflections for more pleasing star images. Ultra-flat BK7 glass housed in a precision CNC machined filter cell for strain-free mounting, and freedom from tilt. Filters are 1mm thick, 1/4 wave flatness, with ≤30 arc seconds parallelism.
- Harrison Telescopes
- Telescope House
- Tring Astronomy Centre
- Rother Valley Optics
- F1 Telescopes
- Io Astronomy Please note: IO Astronomy voluntarily ceased trading with large unpaid debts affecting the entire UK astronomy industry. You may contact us for problems / issues with Altair or iOptron products ONLY - or try Darkframe Optics / Dave Woods. Unfortunately, we will not be able to support undeclared products bought from the ex-directors after the company ceased trading.
- Astro AS Denmark, Europe
- Robtics Netherlands
- Pierro Astro France
- SkyVision France
- Teleskop Service Ransburg Germany
North America & Canada orders:
- Land Sea & Sky (Takahashi America) USA
- Cloudbreak Optics USA
- Ontario Telescopes Canada/North America
Products can be ordered online from Altair with tracked insured shipping to anywhere in the world. For large items shipping price may need to be re-quoted.
Russia orders: Please contact.