This is a scene from Lucas Creek, in Albany, Auckland. It's a few minutes from where I work, so I made a diversion on the way to work to stop here. I've used an ND3 grad to reduce the brightness of the sky in the top of the scene. A Lee Big Stopper was used to slow the exposure.
I did apply a light vignette to the edges to draw more attention to the waterfall. In this case, the 20mm lens wasn't optimal for the scene. It gives a very wide perspective, and I couldn't get closer to the waterfall. I'd have preferred to make the waterfall a larger element of the photo.
Nonetheless, the challenge is to shoot this month with just one prime lens.