Most of mine are on 35mm slides, and prints prior to that. They go back a ways now. Here's one I happened to have digitized from a print, one with a neat story attached.
I was chasing spawning run browns in Nov of 1982 up a small trib of a larger stream under perfect conditions. As I fished, a lifter (disguised snagger) stopped his fish-hunting to watch me fly-casting. "Always wanted to try that...", he called down to me. "Do you catch any?" was his next question. As if on cue, this smallish brown came up off bottom of a small pool and took my fluorescent streamer (I called Thunder-n-Lightning for the wake and flash it produced) that was hanging just below the surface. "Amazing!" the guy shouted out, and then repeated over and over again as the reality kept sinking in. I discovered that in those days of widespread ignorance that lifters would rather be anglers -they just didn't know how. They all sported fly rods and reels, but strung with 17lb fluorscent mono, the largest legal hook, and some giant split-shot.
The guy snapped this picture. I then turned around and got socked by a much bigger brown that ended up breaking me off on the strike -a violent strike that nearly carried the fish completely clear of the surface. "AMAZING!!!!" the guy stammered, and then began repeating all over again until the effect eventually wore off. He then ordered a dozen each of two patterns in two colors (I was tying for local a shop then), although I told him he didn't need to go overboard to start.
A while later I saw him on the main stream with one of my streamers tied on -on 17lb fluorescent Stren with a couple giant split-shot. Oh well... I suppose by then he was in process of discovering that the flies weren't magic, or that the magic in them needed some conjuring.