I shoot two rolls of EIR with the recommend yellow filter, along with an orange and red one. Had a need to drive to north Florida so I stop an aerial lab in Daytona, their web said that they did AR-5 (recommend process) but it turned out, they no longer did it on sit. They process on site with C-41. I liked the sample, so I when with the c-41. Found that the frames shot with orange and red filter needed a lot of post processing. Have not seen c-41 sample with orange and red filter so I am not sure with is with. I still have 3 rolls of EIR for JT and CA, have not decided how I want it processed yet. Canon EOS-1, 28-70 2.8f L Aerial Photo 200 Fentress Blvd Suite D Daytona Beach, FL 32114 386-253-5041 I believe all except 3, 6 & 7 are with the yellow filter.