Pegasus Astro Blue filter
The filter Pegasus Astro Blue is a high-quality photographic filter designed specifically for astrophotography. Here are its detailed features:
Technical specifications
- Diameter : 50.8 mm (2 inches)
- Thread : M48 x 0.75 mm
- Total thickness : 7.5 mm (5 mm filter body + 2.5 mm thread)
- Transmission range : Tave > 95%, 410-500 nm
- Polishing : 1/4 wavelength
- Coating : Anti-reflective multilayer
- Type : Band-pass filter
Features and benefits
- Optimum transmission : The filter offers exceptional transmission of over 95% in the 410 to 500 nm range, corresponding to the blue region of the visible spectrum.
- Infrared block : This filter effectively blocks infrared wavelengths, improving image sharpness.
- Parafocality: Like all Pegasus Astro filters, the Blue filter is parafocal with the other filters in the LRGB series, simplifying the image acquisition process.
- Superior optical quality : The 1/4-wavelength polish guarantees excellent image quality and optimum sharpness.
- Anti-reflective coating : Multi-layer anti-reflective coating eliminates halos, ghosting and unwanted reflections.
- Durability: The filter is designed to withstand scratches and temperature changes.
Astrophotography applications
The filter Blue Pegasus Astro is particularly useful for :
- RGB imaging : This filter is an integral part of an LRGB set for creating color composite images with monochrome cameras.
- Deep sky astrophotography : Ideal for capturing the blue details of nebulae and other celestial objects.
- Planetary imaging : It offers high contrast for observing and photographing planets.
Conclusion
In conclusion, the filter Pegasus Astro Blue is a high-quality tool for astrophotography, offering excellent transmission in the blue band while blocking out unwanted wavelengths. Its optical quality, durability and compatibility with other filters make it a first-rate choice for demanding astrophotographers.
