Setting Your Exposure
Exposing for night can go from the spectrum of easy to extremely challenging. This all depends on one thing: available light.
If you are shooting in the streets of a city at night, most likely you’ll have ample light to help aid your exposures. A higher ISO is likely all you’ll need to free yourself to exposing with ease. The greater amount of available light will also reduce the noise generated as you’ll be able to use faster shutters.
The real difficulty of night photography is when you encounter minimal light situations.
Think nature photos at night.
This difficulty, however, definitely pays off. Nothing is more exhilarating than capturing a blanket of stars over a tranquil, mysterious landscape.
Use the Right Aperture for the Job
With lower light available, it’s easy to fall for the trap of picking a large aperture to reduce exposure time. This can lead you to taking shots without adequate depth and lacking in clarity.
Instead, decide first how much depth of field you want in your image.
For close-up shots of subjects, a large aperture can work great. It will allow more light in, reduce shutter time, and produce a great bokeh effect for any background lights.