Let's really simplify this answer for those of you with no familiarity with tools for HMI:
Types of Reflectors:
- Open face - A dimpled reflector that is usable without filters of lenses - great for run and gun type of work. Used extensively in the broadcast industry.
- PAR - A reflector with highly polished surface. Designed for maximum light output. Usually requires the use of scrims or reflectors
Lenses for PAR Reflectors:
- Blue Handle: PAR Super Spot
- Black Handle: PAR Medium Spot
- Green Handle: PAR Medium Wide
- Red Handle: PAR Super Wide
Screen Scrims - Metal screen scrims:
- Red Ring Color - Double Scrim
- Green Ring Color - Single Scrim
Fresnel Lens : Concentric Circles to Fresnel pattern
- Greyish White Color Handle - Fresnel Lens
Conversion Filter Tungsten:
- Red Handle on Yellowish-Orangish - Blue Tint Coating Lens - Converts HMI to 3200K Tungsten
Diffusion Filter:
- White Handle - Diffusion Filter
Kobold reflectors can be changed on any Kobold HMI fixture to do a tool free conversion from PAR to Open face reflectors. Kobold also has a bayonette tool free adaption to a SourceFour adapter (Tool is required to screw a plate to the S4, but is easily removed from S4).