The ADJ EPL500 Lens Tube is a specialized optical accessory designed specifically for use with the Encore Profile Pro series of ellipsoidal reflector spotlights (ERS). This interchangeable lens tube houses the precise lens train responsible for projecting and focusing the sharp, defined beam of light produced by the fixture. It allows lighting technicians and designers to easily change the beam angle of the profile spotlight in the field by swapping the entire lens tube assembly, providing crucial flexibility to adapt the fixture's coverage and intensity to different stage positions or lighting design requirements without needing multiple complete fixtures.

Constructed to exacting optical standards, the lens tube contains a carefully aligned set of lenses—typically a combination of convex and plano-convex elements—that work in conjunction with the ellipsoidal reflector to collect and project light from the lamp or LED source. The EPL500 is engineered to mount securely onto the front of the compatible Encore Profile Pro housing, featuring a robust locking mechanism to ensure it remains perfectly aligned during focus adjustments and movement. The tube is finished in a durable, matte black coating to minimize internal light reflections and glare, which is essential for maintaining high contrast and a clean, hard-edged beam.

This accessory exemplifies the modular design philosophy of professional theatrical lighting, where key components like lens tubes, pattern holders, and shutters are field-replaceable. By investing in additional EPL500 tubes with different focal lengths (e.g., 19°, 26°, 36°, 50°), a lighting inventory gains significant versatility, as a single fixture body can serve multiple purposes throughout a production's lifecycle. The design prioritizes ease of use, with handles or grips for safe handling of the potentially hot glass, and ensures reliable performance under the thermal stresses of high-output lamps. For any user of ADJ's Encore Profile Pro ellipsoidals, the EPL500 lens tube is a fundamental component that directly defines the fixture's core functional characteristic: its projected beam.