Astronomik UHC 36mm Filter – High Contrast for Deep Sky Observation

The Astronomik UHC 36mm filter is designed for deep-sky observation, providing unmatched contrast for nebulae and gas clouds.

This filter is compatible with 36mm filter wheels from ZWO, QHY, QSI, Starlight Xpress, SBIG, Moravian, and Atik. Its protective ring and blackened edges minimize stray light and ensure easy handling, while orientation in the filter wheel does not affect optical performance.

Get clearer views of stars and deep-sky objects. The Astronomik UHC filter blocks unwanted light pollution and enhances contrast by transmitting nearly 100% of O-III and H-beta radiation, making it ideal for observing gas and planetary nebulae.

Key Features

• Compatible with all major 36mm filter wheels
• Allows nearly 100% transmission of O-III and H-beta lines
• Blocks scattered and artificial light for enhanced contrast
• High optical quality, ensuring sharp star images
• Works best with telescopes of 50mm aperture or more

Optimal Use

Optimized for telescopes with apertures starting from 50mm, the Astronomik UHC filter works best at focal ratios between f/4 and f/15, providing high light transmission with no chromatic distortions. The filter delivers needle-sharp stars without reducing the telescope's performance.

Product Compatibility

• Visual Observation in Dark Skies: Excellent for all apertures
• Visual Observation in Urban Skies: Best for telescopes over 100mm
• Film Photography: Good, but requires long exposure times
• CCD Photography: Works well with an IR-block filter
• DSLR Photography (Original): Enhanced contrast but slight color shift
• DSLR Photography (Astro Modified): Excellent with near-perfect color balance
• Webcam/Video (Planets): Not recommended
• Webcam/Video (Deep Sky): Effective in light-polluted areas

Technical Details

• 95% transmission at 486nm (H-beta)
• 95% transmission at 496nm and 501nm (O-III)
• 95% transmission at 656nm (H-alpha)
• Effective for telescopes with focal ratios from f/10 to f/3.5
• Complete blocking of unwanted wavelengths
• All-purpose deep-sky filter, great for small telescopes
• Scratch-resistant and durable
• Optically polished to maintain telescope performance
• Parfocal with other Astronomik filters
• Glass thickness: 1mm
• Resistant to humidity, scratches, and aging
• Delivered in a high-quality, protective filter box