Forwarded for Ethan, Marty and group, In 'general', FC faf is acheived by using 'wider pass' filters, allowing= more light to reach the detector, because... SLO systems, using a dedicated, point- by- point light source and a much= more sensitive detctor, usually collect light from mainly one retinal f= luorophore, the elusive but educational Lipofusin. Hence, images from these two different systems often seem divergant. Once i get my own computing machine back from the 'shop' i can send you = some references and lit, if you wish. Sorry for any inadvertant typos, glass pads Are tricky, Ethan