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You cannot watch any moviemulti-disc reflectors you may berange of sizes to suit differentthese days without comingfamiliar with.cameras and with a range ofacross the use of green orSupplied in a good qualityadapters to allow you to use oneblue screen technology. Youround bag, at 5kg it’s prettyLiteRing on several cameras. Iwill see chromakeyportable. Getting it back intouse a ‘Medium’ green LiteRingtechnology used every timethe bag is another story! Thewith a 37mm adapter for theyou watch the TV weatherforecast or most news andcurrent affairs programmes –usually to add graphicalbackgrounds. But is thissomething you can use foryour productions?Reflecmedia make a range ofchromakey solutions for studioand portable use. This reviewfocusses on the portableChromaflex screen - a 2.1msquare collapsible screen whichfolds down to a 90cm disc in asimilar manner to the smallerscreen works in conjunctionwith a LiteRing – LEDSarranged in a circular casingthat is positioned in front of thecamera lens. The LEDs providethe light (blue or green) toilluminate the Chromaflexbackground for chromakeyproduction.Show me the Light!The LiteRing is supplied with apower supply and a dimmercontrol in a robust carry case andis available in green or blue; in aSony PDX10 and a 72mmadapter for the Sony Z1E. Theadapter plate is made frommachined aluminium and screwsinto the front of the lens –meaning you cannot use anyother lenses with the camera.The LiteRing then attaches to theadapter plate with a single handscrewwhich makes it quick to setup the light source.How it WorksThe Chromaflex screen is grey inappearance and contains millionsof tiny glass beads that act asreflectors, shining the light backto the source. When using thedirectional light from theLiteRing, the light goes back tothe camera lens and the screenappears a uniform green (or bluewith the blue LiteRing).The amount of light from theLiteRing is low - approx 10W, sothe chance of blue or green spillon the subject being filmed isquite low.Fixing the ScreenThe Chromaflex screen can behung from the ceiling on itsattached strap or be placedagainst a wall, and the built-inmetal frame will support itsweight.Reflecmedia also make achromakey curtain using thesame material - called theChromatte drape - which can bebought in a variety of fixed sizesor made to order in any customsize to fit your studio.Why is it Different?Unlike conventional green or bluescreen technology, where youmust light the screen evenly,with the Reflecmedia solutionyou just need to light the subjectbeing filmed, and the LiteRinglights the screen for you.This provides the benefit ofbeing able to set up and use theportable screen in any controlledlighting environment and not justthe studio. So it is now possible18 March 2006 Focus Magazine www.iov.com