ZWO lai ribaduse filtrid - H-alfa, SII, OIII 7nm - 31mm ringikujulised pole monteeritud

Narrowband ZWO H-alpha, SII, OIII 7nm filters are designed for astrophotography and allow you to capture "Hubble-like" images. By selectively reducing the transmitted wavelengths, these filters eliminate public lighting and moon effects.

The aluminum cell is manufactured using CNC machines that ensure high precision fabrication. The filter is available in 4 formats, including the unmounted circular format of 31mm.

Technical Specifications

• FWHM (Full Width at Half Maximum) : 7nm (+/-0.5)
• Bandwidth : 90% on Ha/S-II/O-III lines
• Infrared cutoff (700/1100nm)
• Schott glass
• Thickness of the glass : 1.85mm
• Precise optical polishing to ensure a precise wavefront at lambda/4 and parallelism <30" arc on both surfaces
• Double-sided optical coating
• Anti-reflection treatment
• Aluminum cell construction manufactured using CNC

Usage

These filters are ideal for CCD imaging, digital photography (modified camera) and enhance the contrast of nebulae.