The Film Book - The Gaffer also uses the 'Gaffer glass/pan glass' to look directly into the sun to monitor where the sun is in accordance with the clouds. They would be
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E-Image EI-A34 Gaffer Glass (2 pcs) > Accessories > Steady Pro Equipment Sdn Bhd (887463-U) (GST: 000812441600)
Alan Gordon Enterprises Blue Ring Gaffer's Glass 1056-GAFFBLUERI
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E-Image EI-A34 Gaffer Glass (2 pcs) > Accessories > Steady Pro Equipment Sdn Bhd (887463-U) (GST: 000812441600)