Originally posted by WPRESTO That first image is spot-on!
Here's the horsefly image taken back in the Film Era. This one is alive and feeding on a drop of molasses, so the eyes have their natural, vivid colors and are almost completely clean (I see one dust speck). SCAN from a chrome. BTW: Almost certainly taken with a 90mm f2.5 Tokina macro.
Beautiful shot! It's rare to find them with their eyes completely clean, so don't worry about that. I had no idea they enjoyed molasses, but it makes sense, and it's a great idea for non-destructively immobilizing them, at least briefly.
Sometimes I entertain daydreams about building a macro rig inside one of those portable coolers... So I could haul the thing into the field and then chill bugs right on the stage, and then let them go after. I think the condensation issue could be beaten by physically isolating the camera and coating the exposed lens or objective with one of those anti-fogging sprays.