Cokin M filter holder, wide-angle version

The Cokin BPW-400 is a single-slot filter holder for Cokin M (P series) adapter rings, specially designed for ultra-wide-angle lenses where a standard three-slot holder would cause vignetting. The slim single-slot profile provides an approximately 20% wider field of view than a regular three-slot holder, making it a practical choice for wide-angle landscape and architectural photography at 20 mm and wider.

Key features

• Single filter slot - approximately 20% wider field of view than a standard three-slot P series holder, eliminating corner vignetting on wide-angle lenses
• Compatible with all Cokin M (P series) adapter rings (48–82 mm)
• Ultra-slim profile designed for lenses from 20 mm (full-frame equivalent) and wider
• Lightweight and durable construction

Specifications

• Filter slots: 1
• System: Cokin M / P series
• Compatible rings: 48–82 mm (P series adapter rings)
• Minimum focal length: 20 mm (full-frame equivalent)
• Brand: Cokin
• Part number: BPW-400