OIII filter 7nm Pegasus - 2″ Mounted

Pegasus Astro OIII filter

The filter Pegasus Astro OIII is a high-quality narrowband filter designed for astrophotography. Here are its detailed specifications:

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)
• Bandwidth : 7 nm
• Center wavelength: 500 nm
• Transmission : Tave > 80% at 500 nm
• Polishing : 1/4 wavelength
• Coating : Anti-reflective multilayer
• Type : Narrow-band interference filter

Features and benefits

• Optimum transmission : The filter provides a transmission greater than 80% at a central wavelength of 500 nm, corresponding to the emission lines of doubly ionized oxygen (OIII).
• Narrow bandwidth : With a bandwidth of just 7 nm, this filter effectively isolates the OIII emission lines, allowing for excellent separation of spectral details.
• Parafocality: Like all Pegasus Astro filters, the OIII filter is parafocal with the other filters in the series, simplifying the image acquisition process.
• Superior optical quality : The 1/4-wavelength polish ensures excellent image quality and optimal 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

• Nebula imaging : Ideal for capturing the details of nebulae rich in ionized oxygen.
• Reducing light pollution : The narrow bandwidth allows for effective imaging even in areas with high light pollution or during a full moon.
• False color imaging : Used in the Hubble palette technique (SHO) to create spectacular false-color images.
• High-resolution imaging : The narrow bandwidth produces high-contrast images that reveal fine details in nebular structures.

Conclusion

In conclusion, the filter OIII Pegasus Astro is a high-quality tool for specialized astrophotography, offering excellent transmission in a narrow band centered on the emission lines of doubly ionized oxygen.

Reference and Configuration

How do I check for compatibility?

Before setting up your system, compare the exact part number, generation, and connection types of your equipment with the manufacturer’s documentation. An accessory from a different generation is not necessarily interchangeable.

Documentation: Pegasus Astro, manufacturer information. To verify a specific configuration, provide the reference number PEG-FLTR-2M-O3 to Deep Space Astronomy.