Antlia U-Venus planetary filter

Antlia U-Venus filter

The Antlia U-Venus filter is designed to capture the cloud structures of Venus and Jupiter in the ultraviolet spectrum. Using the latest dielectric coating technologies, it offers high UV transmission while blocking unwanted visible light frequencies that typically obscure cloud details in conventional sensors. This filter is intended for astrophotography and not for visual observation.

Key features

• Transmission higher than 80% in critical UV bands
• OD3 (≥0.001) suppression of spurious wavelengths from 200 nm to 1050 nm
• One-piece, unglued optical substrate
• Double-sided polished surface to ensure λ/4 wave flatness
• Surface quality: 60/40 (MIL-O-13830 standard)
• Parallelism less than 30 arcsec
• Double-sided dielectric multilayer coating
• Anti-halo design for bright stars

Ideal applications

• UV imaging of Venus' cloud structure
• Capturing UV details on Jupiter and other planets
• UV Photography Outside of Astronomy: Flora, Plant Health, Insects, Forensic Investigations

Recommendations for Use

• Remove all UV/IR filters from planetary cameras to maximize UV transmission
• Allow for longer UV exposure times, as the sensitivity of the sensors decreases significantly below 400 nm
• Using cameras specially modified for UV photography with DSLRs
• Avoid using with standard electronic flashes (low useful UV output)

Technical specifications

• Size: 1.25″ mounted (M28.5×0.6)
• Thickness: 2mm ± 0.05mm
• Average transmission (Tave) : >80%
• OD3 suppression between 200-1050nm outside the targeted UV band

Bracket design

• Ultra-thin cell to maximize the effective aperture
• Durable black anodized finish
• Durable, fade-free laser engraving

Cautions and warnings

• Do not use for solar observation.
• Forbidden for all UV visual observation.
• This filter is intended exclusively for photographic imaging.