The ETC Source Four 36° lens tube delivers a precise, bright beam with excellent edge control — ideal for mid-throw applications such as key lighting, stage wash, and gobo projection. Compatible with all ETC Source Four and Source Four LED Series fixtures, this standard (non-enhanced) version provides ETC’s trusted optical performance with smooth focus and consistent output.

Built from rugged aluminum with precision-ground borosilicate glass lenses, the 36° tube balances beam spread and intensity, making it one of the most versatile choices for theatrical, corporate, and event lighting.

Specifications:
Beam Angle: 36° (medium coverage)
Version: Standard / Non-Enhanced
Compatibility: ETC Source Four, Source Four LED, and Source Four CE fixtures
Lens Type: Dual-element glass optics, anti-reflective coated
Material: Aluminum housing with integrated focus knob
Mounting: Standard ETC twist-lock barrel design
Field Angle: 36° nominal
Weight: Approx. 3.5 lbs (1.6 kg)

Key Features:
Medium 36° beam for balanced throw and coverage
Smooth focus and sharp gobo projection
Compatible with all ETC Source Four and LED Series fixtures
Durable aluminum housing built for touring and installation
Standard (non-enhanced) lens design for reliable, consistent results

Applications:
Theatrical key lighting and gobo projection
Stage, studio, and event lighting setups
Corporate and worship spaces
Trade shows and architectural highlighting

Comparable Models:
Comparable to the ETC Source Four 36° Standard Lens Tube and similar medium-angle optics from Altman and Strand Lighting.