Ultimate Training of Photography Tips, Tricks & Special Effects

Step 4: Post-Process.

Step 3: manual focus.

Step 2: Put your camera in Aperture Priority mode.

Taking the HDR Photograph

Focusing: Set your camera to manual focus and focus out into infinity. Your camera won’t be able to use Auto-focus in these dark conditions. Take a test shot to make sure your stars are sharp.
Exposure Time and ISO: Now let’s calculate the exposure. Take one 30 second exposure at ISO 1600. If it looks properly exposed, just take that 30 seconds and multiply it by 16. If you are using ISO 3200, multiply the shutter speed you used by 32, and so on.

BULB mode is basically a manual setting for shutter speed. It means that if you hold your finger down on the shutter button for 5 seconds, the exposure will be taking place during the 5 seconds you have your finger on the button. If you hold it down for 50 seconds, the exposure will be 50 seconds.