Well on almost any
ERS you will find the focus knob on the bottomof the
fixture.
If the
fixture is hanging with the
yoke and
c-clamp up and the
fixture is right side up < usually with the
gel frame holder oriented so the frame wont fall out and the
gobo slot up so as the
gobo holder wont fall out> the focus knob is usually a three sided or knurled plastic knob towards the front <
lens end> of the
fixture. Just loosen it a turn, do not remove it all the way. The
lens tube should then slide freely in and out without falling out of the
fixture. You'll notice an immediate difference in the light output and as you move the
barrel in and out you see the
image of the
gobo come in and out of focus.
As a side note, depending on the
fixture you may not want to run it at 100%. Depending on the type of
gobo and how much open space it has in it you can burn through it relativly quickly. If, for instance you are running an old er
fixture with a 1000 wat FEL you could burn out the
gobo vry fast, specially if it is out of
bench focus < if the lamp is not properly aligned in the
reflector>
Good luck, Hope that helps.
EDIT- if you are hitting the
teaser use the shutters to cut off that part of the light. Again try to not cut off half of the light with one
shutter as this can have a negative impact on the quality of the focus and if run extremely hot it will lead to premature degradation of the
shutter.