Rainbow

Went up Glenesk for a wee walk. It was windy and damp, and very misty to begin with but then there was a gap in the clouds and this rainbow appeared.
It was a complete arc and lasted over three-quarters of an hour, I don't think I've ever seen a rainbow stay that long before.
I took loads of pics but unfortunately several of them had raindrops on the lens as it was virtually impossible to shield it.
Does anyone know if you can get flexible lens hoods that don't need to screw on to the camera? My camera doesn't have fittings for the standard ones.