Askar Colour Magic 2โ OIII 3nm filter
Visit Askar Colour Magic 2โ OIII 3nm filter is a specialized narrow-band filter for astrophotography, designed to capture ionized oxygen emissions in nebulae. Its main features are as follows:
Technical specifications
- Bandwidth : 3 nm centered on 500.7 nm (OIII line)
- Format: 2" (50.8 mm)
- Maximum transmission : Approx. 85-90% at 500.7 nm
- Thickness : 1.85 ยฑ 0.05 mm
- Optimization : Reduces halos around bright stars
Benefits
- Contrast enhancement : Enhances the contrast of OIII-emitting nebulae.
- Imaging in conditions of high light pollution : Allows imaging even under polluted skies.
- Reduced star intensity: Reduces the intensity of surrounding stars for better contrast.
- Compatibility with other filters : Can be used in combination with H-alpha and SII filters to create Hubble palette images (SHO).
Astrophotography applications
The filter Askar Colour Magic OIII 3nm is particularly suitable for :
- Imaging planetary nebulae : Ideal for capturing the details of OIII-rich planetary nebulae.
- Capturing supernova slag : Perfect for photographing supernova remnants rich in ionized oxygen.
- Photographing diffuse nebulae : Capture the details of diffuse nebulae emitting ionized oxygen.
Additional considerations
It's important to note that this filter requires longer exposure times due to its very narrow bandwidth. However, it offers an excellent signal-to-noise ratio for OIII-emitting objects, even under difficult viewing conditions.
Conclusion
Visit Askar Colour Magic OIII 3nm 2โ filterโ is an essential choice for astrophotographers specializing in the imaging of OIII nebulae and celestial objects. Its ability to increase contrast and reduce halos, while allowing imaging in light-polluted conditions, makes it an indispensable tool for deep-sky observers.
