Lunt B3400 34mm Straight Blocking Filter

Description

The Lunt B3400 is the largest blocking filter in Lunt’s range, featuring a 34mm clear aperture in a straight-through (non-diagonal) configuration. Designed for imaging with large-sensor cameras, it provides the widest unvignetted field of view of any Lunt blocking filter.

All Lunt H-alpha solar telescopes require a blocking filter to safely reject unwanted wavelengths. The B3400 is the premium choice for dedicated solar imagers using full-frame or large-format APS-C sensors.

Key Features

• 34mm clear aperture — largest Lunt blocking filter
• Straight-through design for imaging (no mirror reflection)
• Maximises field of view for large-sensor cameras
• Compatible with all Lunt H-alpha solar telescopes
• 2″ barrel fitting