Long Exposure. The technique, not the crime.
1. Aperture: Use F11. Don’t use a lower aperture. Logic dictates the higher the aperture the more depth of field in your image, but what actually happens at higher apertures is a thing called diffraction. You do get more depth of field, but you lose a significant amount of sharpness. So F11 will block enough light for us without degrading our image! If we need to block more light we will go to F16 later.
So what do you do on a bright sunny day? Or if you want to get ridiculously long exposure times? Filters. Filters are colour neutral darkened pieces of glass or plastic that act almost like sunglasses for your lens, blocking out sunshine to allow the camera to keep the shutter open for longer. Unfortunately, it’s an unavoidable expense if you want to do Long Exposure photography during the day. The most common filters for Long Exposure are Neutral Density and Graduated Neutral Density filters. These filters come in varying strengths depending how much light they block from your lens. There’s always heated debate over which filter company to choose! I’m not going to get into the Nisi V LEE V Cokin battle. Too many arguments to be had and I think everyone should do their own research and decide on a product that suits them, don’t be swayed by influencers and promo codes, attempt to try before you buy and see which one is the best by performing rigorous and strenuous tests with varying controls and demands on each product. Or just buy the Nisi V6 filter holder and be done with it. It has a fantastic integrated polarizer with a handy little wheel to turn it. Fabulous system and very easy to setup and use. Buy it here https://www.filtersforcameras.com
Thanks for reading!
Ronan Harding Downes