Begin your shoot with identifying a suitable location for photography. When it comes to waterfalls and streams, you may not have easy access to the closet point where you would like to be.
Make sure you carry enough lens options so that you can make the best out of the situation.
In most of the cases, you would want to reach a vantage point and use a wider angle lens to get the shot.
You must be mindful of the fact that wide angle lenses make distant objects appear small. So if you are at some distance from the area of interest, you may opt for a normal lens instead.
Depending on the available ambient light, you may need to use ND filters. ND or Neutral Density filters are dark filters designed to lower the light entering the camera. This in turn allows slower shutter speeds, even with fairly bright ambience. To know more about camera filters, you can read here.
In most cases, ND4 or ND8 filters do a wonderful job.
Since you are aiming at slow shutter speeds for the shot, make sure you have the camera mounted firmly on a sturdy tripod. Cheap and flimsy tripods do not offer much help as you might even place the tripod in the middle of the stream. The running water can create enough tremors and can end up in a shaky end result.
Also make sure to use a remote trigger to avoid shake. If you do not carry one, you can use the camera’s timer option and ensure that you do not touch the camera during the click.
A word of caution : As you start getting the beautiful, silky, flowing water streaks in your photos, it is easy to get carried away! Always remember that as you keep on slowing down the shutter speed, the overall haziness of the image increases. This also results in loss of significant amount of details of the scene. Try to strike the optimal combination for the best results.
That’s it. You are now ready to go out and get those dream shots in your camera!