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2-Way Horizontal Masking Trapdoor ElectriScreen (ABT Horiz. ESEM)

Stewart Filmscreen’s trap door systems feature a motorized aluminum trap door which closes when screen is not in use. For flush mount installations, the system also features a builder-friendly hidden alignment ring around the box perimeter.


• Variable Aspect Ratio - Constant Height/Variable Width
• Electronically controlled screen, trapdoor, and horizontal masking panel
• Custom roller tube with sound-dampening insulated screen drive
• Aluminum screen housing with white painted finish
• Available with all Stewart's flexible materials
• Tab-Guy tensioning system ensures smooth surface and eliminates edge curl
• Choose from a variety of Stewart’s front projection screen materials
• black-drop/overscan border above image*
• Matte-black overscan borders on sides and bottom
• Recessed ceiling mount with adjustable drywall flanges
• (1) 3-position low voltage wall switch - screen control
• (1) 3-position low voltage wall switch - horizontal panel control
• (1) 3-position low voltage wall switch - trapdoor control

AVAILABLE OPTIONS: (available by factory quotation)
• Custom sizes and aspect ratios 
• Rear projection models
• Acoustic perforation on front projection models
• Acoustically transparent masking panels
• Custom control options
• BRIC system recommended for maximum masking flexibility and control


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Like all Stewart Filmscreen products, the ABT-EM Horizontal ElectriScreen ElectriMasks are engineered with totally seamless screen materials (this includes masking borders). To prevent edge-curl and insure a flat image, Stewart utilizes our exclusive Tab-Guy Tensioning system. Stewart’s motorized roller system provides a quiet, reliable screen operation. The screen retracts into an obscure trap door that mounts flush with the ceiling surface and can be painted to blend perfectly, efficiently hiding its existence.
Stewart Filmscreen’s ABT-EM Horizontal ElectriScreen ElectriMask is designed to provide the flexibility of a multiple aspect ratio ElectriMask system with a roll-up screen. Aspect ratios from standard NTSC 1.33:1 up to Cinemascope 2.35:1 can be achieved.

Screen Material Quick Reference Guide

Front Projection

Material Name Gain Half Gain Color Description
GrayMatte 70 0.7 Full Lambertian Diffuser Gray

GrayMatte 70 is a flexible, front projection, screen material formulated for use in front projection, edge-blending applications.

StudioTek™ 100 1.0 Full Lambertian Diffuser White

StudioTek 100 is a flexible, front projection, matte-white screen formulated to meet the strictest color and white field uniformity standards. 

FireHawk® 1.1 35 Degrees Gray

FireHawk, in its fourth generation, is a flexible, front projection, screen surface engineered for use with today’s high-powered projection technology in applications involving the presence of ambient light. 

UltraMatte 130 1.3 80 Degrees White

UltraMatte 130 is a flexible, front projection, screen material that is formulated for high output broadcast quality projection systems. 

StudioTek™ 130 G3 1.3 80 Degrees White

StudioTek 130 G3 is a flexible, front projection, screen material that is formulated to provide optimized white field uniformity unmatched by competing gain screens. 

UltraMatte 150 1.5 61 Degrees White

UltraMatte 150 is a flexible, front projection, screen material that is formulated for use in large format applications or when a projector limitation requires a little more punch. 

Rear Projection

Material Name Gain Half Gain Color Description
AeroView 70 0.7 82 Degrees Off-White

AeroView 70 is a flexible, rear projection, screen material formulated specifically for ultra short throw light paths, and edge-blended/edge-matched display systems. 

FilmScreen 100 1.0 39 Degrees Gray

FilmScreen 100 is a flexible, rear projection, screen material formulated with a neutral density gray tint for enhanced contrast. FilmScreen 100 offers a very wide viewing angle for a contrast enhanced material and works well in short throw projection light paths.

AeroView 100 1.0 63 Degrees Off-White

AeroView 100 is a flexible, rear projection, screen material formulated to provide excellent white field uniformity. The AeroView 100 performs superbly in environments where ambient light can be controlled and is appropriate for wider viewing angles.

LumiFlex 130 1.3 42 Degrees Off-White

LumiFlex 130 is a flexible, rear projection, screen material formulated at a higher gain and is appropriate for larger screen sizes or low output projectors. LumiFlex 130 offers excellent white field uniformity, has a gain factor 30% above unity, and delivers a lot of energy.

FilmScreen 150 1.5 31 Degrees Gray

Tinted for enhanced contrast, FilmScreen 150 is a perfect choice for passive 3-D applications. FilmScreen 150 is excellent in rooms where high ambient light is a concern and is appropriate for moderate viewing angles.

Standard Controls

Control Power Options Description
BRIC 115V / 220V

The Binary Reciprocal intelligent Control System, nicknamed "The BRIC," is the industry's first microprocessor-based control device designed for precision setting of multiple masking presets, elimination of multiple controllers for a single screen, and eliminates the setup time required by existing analog controllers.


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