The Optic fly was released by ABU in 1967 as “a streamer of tremendous killing power” – and that label wasn’t all wrong. The Swedish tackle manufactor actually sold 80.000 Optic flies in the first year alone. The Streamtease is still a fabulous fly when trout feed on sticklebacks, minnows or young-of-year fry. This pattern has given me some beautiful lake-living wild brown trout.
You can get more info… or buy the book, Tying and fishing the ABU Optic Flies here: https://shop.michaeljensens.com/?product=tying-and-fishing-the-abu-optic-flies&lang=en
Or buy the Kindle version here: https://amzn.to/2I7BV9b