Ellipsoidals

Source 4
19º

HPL 575w

 

Strand Century 6x12
Long

FEL 1Kw

 

Century 8x9

EGM 1Kw

 

Source 4
26º

HPL 575w

 

Strand Century 6x12
Short

FEL 1Kw

 

Altman 6x12

FLK 575

 

Electro-Controls 6x9
EGM 1Kw

Uses
Wherever a precisely focus light is needed, often from front of house.

Advantages
Sharp circle of light
Shutters
Patterns
Adjustable lens tube for soft focusing


Ellipsoidal Lamps
Ellipsoidal Lamp

FEL FLK HPL

Ellipsoidal Reflector
Ellipsoidal Reflector



Elliptical Reflector Diagram


Elipsoidal Lenses
Ellipsoidal Lens


The Principle of Refraction



Refraction


Plano-Convex Lens

 


Light Traveling Through Flat Glass

Section View


Light Travelling Through Lens


Section View



from Stage Lighting for Students
by Jeffrey E. Salzberg
with Judy Kupferman


Lens Sizes


Comparing Different Focal Lengths


Converting Focal Lengths to Width in Degrees
6 x 9 = 40 degrees
6 x 12 = 30 degrees
6 x 16 = 25 degrees
6 x 22 = 15 degrees
8 x 9 = 20 degrees
8 x 13 = 13 degrees
10 x 20 = 15 degrees


Accessories

Gel Frame Holders


Gobo Pattern Holders




Glass Gobos


Gobo Rotators



Irises


Zoom Capability
Strand 6" Zoom Parellipsphere

FEL 1Kw

EGM 1Kw


Dichroic Reflectors

Source 4