barbagris
Mad Scientist
- Joined
- Aug 1, 2010
- Messages
- 12,988
- Location
- On the verge of insanity
- Ride
- 1979 Guzzi V1000G5 - 2018 KTM 790 Duke
Cautioning NOTE - "That thing" may not be legal depending where you live.Click on "one of these" and it will take you to "this thing".
If you've an non patterned lens - it's very obvious and easier to get wrong.
Old fashioned patterned lenses are more forgiving regarding light emitter focal point.