ZWO 31,75mm Filter OIII 7nm

Improve your images with the ZWO OIII 7nm filter. Specifically designed for deep-sky imaging, this narrowband filter optimizes the capture of doubly ionized oxygen (O-III) emissions, offering exceptional image quality while reducing unwanted light interference.

Characteristics:
• 7nm bandwidth (FWHM) centered at 500nm
• 90% transmission on the O-III line (500.7nm)
• Infrared cut-off (700-1100nm)
• Made of 1.85mm thick Schott glass
• Double-sided optical coating with anti-reflection treatment
• CNC-machined aluminum cell for increased precision
• Available in 4 formats: 31.7mm, 50.8mm, 31mm and 36mm unmounted

Advantages:
• Capture fine details of diffuse and planetary nebulae with high contrast
• Significant reduction of urban lighting effects, improving image clarity
• Easy integration with H-Alpha and S-II filters for "Hubble-like" images
• Robust and precise construction ensuring durability and optimal performance
• Simple installation without the need to recalculate backfocus thanks to the intuitive design

Compatibility:
• Ideal for CCD imaging and modified digital cameras
• Compatible with optical systems using full-frame and medium-format sensors
• Works perfectly in combination with ZWO H-Alpha and S-II filters

Tips and tricks:
• Combine this filter with the H-Alpha and S-II filters to enrich your images in natural colors
• Use a stable and well-balanced mount to minimize vibrations during long exposures
• Regularly clean the filter with suitable materials to maintain optimal transmission