Slow Motion Dusk

Clifton Dusk

The evening star rising over Clifton, Cape Town, South Africa

I had some fun last week with my new neutral density filters. For those who don’t know them, they allow you to do a couple of cool things, and this photo features two different kinds. The first is a common or garden variety neutral density filter, which just looks like a sheet of dark grey glass. It uniformly reduces the light to the camera, allowing one to take longer exposures than normal. This shot was a several minute exposure which is why the sea is starting to smooth out and the clouds have become smudgey. The second kind of neutral density filter I used here is a gradient neutral density filter. This is a piece of glass where half is clear, and half is dark grey to reduce light. You position it so that the grey part is over the sky, and the change from clear to grey is exactly on the horizon. This lets you balance the exposure of the sea and the sky. If you don’t do it, you’ll find that the sky will overexpose and be too bright. It’s the old fashioned alternative to using HDR.

For those who care about the technicalities, I used a Lee 0.9 ND Filter combined with a Lee 0.9 Hard Grad ND. It was a 180 second exposure at f8. I had to photoshop Venus back into a dot shape, because it had turned into quite a light trail after that amount of time.

The photo was taken from the rocks at Clifton Fourth Beach on a chilly autumn evening. It’s hard to see, but the spikey edge to the dark rocks is actually dozens of roosting sea birds.

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