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Source 4 Lighting Fixtures


Cleaning S4 Lenses

 All information taken directly from ETC fixture manuals

Cleaning 19°, 26°, 36°, and 50° glass lenses
1.Remove the beam focus knob at the bottom of the barrel. Remove the lens tube from the barrel.
	WARNING:Never use glass and window cleaner or any abrasive material to clean the lens.
	Glass and window cleaners will stain the lens surface.
	Abrasive materials (such as steel wool) will damage the surface of the lens.
2. Dampen a clean lint-free cloth with vinegar or household ammonia. You may also use water, but it will leave spots that can be removed by gently polishing the lens with a clean and dry cloth. 3. Starting from the center, gently wipe the lens. 4. Slide the lens tube back into the barrel with the color frame retaining clip on top. Replace the beam focus knob.
Cleaning 5° and 10° polymer lenses
To quickly clean the lenses, remove dust with a blast of oil-free air. If this is not sufficient, follow the instructions below. You will need a Phillips screwdriver.
	WARNING: Handle polymer lenses by their edges only. Never rub anything dry on a polymer lens.
	Do not use glass and window cleaners on the lens. This will damage the lens. Remove dust with
	a blast of oil-free air. If this is not sufficient, follow the instructions below.
1. Remove the beam focus knob. Gently pull the lens tube out of the barrel.
2. Use a Phillips screwdriver to remove the brackets that hold the lens in place. Remove the lens from the tube.
3. Dip the lens in a clean alcohol/water mixture (10% alcohol).
4. Use a moistened nylon bristle brush to wash the lens' smooth side in a linear (non-circular) motion.
5. Use the same brush to lightly wash the lens' ridged side by following its ridges.
6. Dip the lens in a clean alcohol/water mixture (10% alcohol).
7. Dry the smooth and ridged surfaces with an air gun. Make sure that the air flow moves liquid away from you.
8. Inspect the lens for dirt. Repeat steps 3-7 if necessary.
9. Set the lens back in the lens tube with the ridged side facing the front of the tube. Replace the lens brackets.
10.Slide the lens tube back into the barrel with gel frame retainer on top. Replace beam focus knob.

Cleaning S4 Reflectors
To quickly clean the reflector, remove the lens tube and clean the dust from the reflector with a blast of oil-free air. You may also wipe the reflector with a clean lintfree cloth. If either method is not sufficient, follow the instructions below. You will need a Phillips screwdriver to complete this procedure.
	WARNING: Unplug the fixture bewfore attempting to clean the reflector.
	Do not use glass and window cleaners on the reflector. Chemicals in these cleaners will 
	stain the reflector. Do not use paper towels or harsh materials to wipe the reflector.
	These materials can scratch the surface of the reflector.
1. Remove the barrel rotation knob located at the bottom of the barrel. Use a Phillips screwdriver to remove the retainer bolt located on top of the reflector housing.
2. Rotate the barrel 45° in either direction. Carefully remove the barrel from the reflector housing.
3. Dampen a clean lint-free cloth with alcohol or distilled water. (Alcohol is recommended.)
4. Gently wipe the reflector.
5. Insert the barrel into the reflector housing with the iris/pattern slot on top. (Line up the triangles on both parts.)
6. While pressing in gently, rotate the barrel 45° clockwise until it sets into position. Then, rotate the barrel counterclockwise 45°. The barrel should be firmly attached and the triangles should line up again.
7. Replace the barrel rotation knob and tighten the retainer bolt.



S4 Lens Tube

Way back when there were only six lens choices for the Source 4 Ellipsoidal, telling them apart was relatively easy. Now there are many more options. In addition to the new 14°, 70° and 90° lenses, there are Enhanced Definition ("ED") lenses in 19°, 26°, 36°, and 50°. That's thirteen lens options, eight or which are in the standard cast lens tube. The others have distictive shapes - thank the deity of your choice for that. Below you'll find links to some useful ETC documents, and rental shop color codes.

ETC Lens Tube Product Update.pdf
ETC 14°, 70°, & 90° Lens Tube Supplement.pdf

Some shops paint the color code in the fingernail-like area inside the color clip, while others paint one of more flat sides of the tube - I assume this is done to make it easier for the audience to critique the instrumentation choices.

Lens Tube Color Coding: PRG, 4Wall
 5°  (none)
10°  (none)
14°  (none)
19°  Red
26°  Blue
36°  White
50°  Yellow
70°  (none)
90°  (none)


Lens Tube Color Coding: Bestek
 5°  (none)
10°  (none)
14°  (none)
19°  Red
26°  Blue
36°  White
50°  Yellow
70°  Green
90°  Purple