The KUPO ETI-FJ18 is an 18-leaf manual iris made specifically for S4 Junior. It gives the smaller S4 Junior format a dedicated aperture-control accessory for tightening specials, reducing spill, and refining cue looks without changing the fixture position.
Why It Matters
S4 Junior need an iris sized to their accessory format, not a larger profile iris forced into the wrong place. ETI-FJ18 keeps the same smooth manual control approach as the wider ETI family while matching the compact fixture format.
Key Features
18-leaf iris sized for S4 Junior rather than larger S4 accessory formats
Aperture adjusts from 4.5 mm to 75 mm for broad or tight beam control
Heat-resistant stainless steel leaves are finished with formulated gray paint rated up to 450 °C
Three fixed focusing holes support quick placement in the accessory slot
Compact listed dimensions match the S4 Junior application
Applications
Use it for compact profile specials, small theatres, studio stages, school venues, and rental systems using S4 Junior that need repeatable circular beam adjustment.
Compatibility
Designed for S4 Junior, with listed dimensions A 80 mm, B 110 mm, C 12.5 mm, and D 78 mm.
Frequently Asked Questions
Can I use this in a full-size S4 fixture?
No. ETI-FJ18 is the S4 Junior model, with smaller listed dimensions than the full-size S4 iris formats.
Is the aperture range different from the other ETI iris models?
The listed family aperture range is the same 4.5 mm to 75 mm.
Why are the leaves painted gray?
The formulated gray paint is listed for heat resistance up to 450 °C in theatrical fixture environments.
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