Once upon a time there was Kodachrome film, 25, 64 and 200. While it was available most professionals, myself included shot Kodachrome. It was perfect color film. Only a limited number of processing labs were outfitted to do the very special processing that it required. When Kodak stopped, Fuji moved in with E 6 processing. Many pros, like me made the move to Fuji Velvea, in both the 50 and 100. Sensia was the lower cost film Fuji marketed as oppose to higher costing Velvia. Sensia is a good film for slides.
Sent from my iPad using Tapatalk Pro