- Expert Telescope
- Correctors and reducers
- Guiding accessroires
- Filters and accessories
- Finder and accessories
- Visual Accessories
- Adaptators and Extensions
- Transport and protection
- Cleaning and maintenance
- Others Accessories
- Power supply and electronic
- gift card
Brand: Player One
Uranus-C is (IMX585) camera developed by Player One Astronomy, which adopts the newest Sony IMX585 1/1.2” format color sensor. The 2.9um pixel size accommodates a well depth of 38.8Ke with a total of 8.3MP (the resolution is 3856*2180), and the diagonal is 12.85mm.
Filter Ha 7nm Serie - OPTOLONG
Optolong H-ALPHA 7nm filter
The H-ALPHA 7nm filter is the most popular narrowband filter allowing a 7nm bandwidth centered on a 656nm wavelength.
Payements 100% Sécurisé
Expédition Express des pièces en stock
Retour sous 14 j
⚠️ Please choose your filter version in the drop-down menu under the mini description
Optolong H-ALPHA 6.5nm filter
The 7nm H-ALPHA filter is the most popular narrowband filter that allows a 7nm bandwidth centered on a 656nm wavelength and reduces the transmission of certain wavelengths of light, especially those produced by artificial light, including mercury vapour, both low and high pressure sodium vapor lamps and unwanted natural light caused by the emission of neutral oxygen into our atmosphere (eg Skyglow).
The H-ALPHA astrophotography filter remains the best choice for the highest contrast and for revealing fine nebula detail.
Main use and performance
Suitable for viewing low emission nebulae in H-ALPHA lines under moonlight or heavy light pollution conditions.
Narrowband imaging can be obtained by combining the filters of the SHO set (H-ALPHA, OIII, SII), in lunar and light pollution conditions, in this way the equipment does not remain stationary for weeks .
The H-ALPHA filter is the first filter that is usually added to the LRGB KIT by most astrophotographers, in this way they mix the black and white image with the RGB data to obtain and improve the structural details while maintaining a natural look of the image. .
The H-ALPHA filter does not eliminate the effects of light pollution and does not increase the brightness of the photographed object, but rather increases the contrast between the nebula and the night sky, which facilitates image processing .
This H-ALPHA 7nm narrow band filter is designed for use in filter wheels, in filter holder drawers or directly on the camera (not valid for those not mounted in the cell)
- Schott substrate material
- Thickness 2.0mm (1.25"/2"/36mm)
- Thickness 1.0 mm (Clip series)
- Surface quality: 60/40 (refer to MIL-O-13830)
- Fine optical polishing to ensure accurate 1/4 wavefront and <30 seconds parallelism on both surfaces
- 80% transmittance to the h-alpha line Infrared wavelength of 656 nm, cut-off 700 to 1100 nm
- 0.1% transmittance of out-of-band artificial light pollution, especially large emission lines (i.e. Na 589 nm, Hg 435 nm and 578 nm). A transmission of 0.1% is equivalent to OD3 (optical density), and a high optical density value indicates very low transmission and a low optical density indicates high transmission.
No customer reviews for the moment.
Marque: Baader Planetarium
Les nouveaux filtres F/2 de chez Baader sont à la fois étudié pour les grandes ouvertures entre F/1.8 et F3.5 et à la foi optimisé pour les caméras de type CMOS nouvelle génération à grande sensibilité et petit pixels
Marque: Baader Planetarium
Filtre à nébuleuse O-III à bande étroite par Baader-planétarium pour astrophotographie avec capteurs CMOS pour contraste élevé pour les télescopes de F / 10 - F / 3.5