When shooting long exposures, the desired effect of the image frequently requires shutter speeds which are several minutes long. Most camera bodies have a default shutter speeds that only extend to 30 seconds. For shutter speeds longer than 30 seconds, most DSLRs and mirrorless cameras now have a ‘bulb’ mode which allows a shutter duration as long as you like! Here are some tips about shooting in bulb mode.
The scenes
The most common scenario for shooting in bulb mode is when you are using dense ND filters to enable a long exposure. The main exceptions to this rule are when you are shooting star trails which may require multiple exposures of several minutes’ duration, and shooting during blue hour where the low available light allows you to achieve a long exposure by adjusting aperture and ISO appropriately.
@ Dylan toh
The exposure time
Here is another section on this blog covering how to calculate an exposure duration based on the density of ND filter being used.
Calculating Exposures with an ND Filter:The ISO6400 Trick
When you are using an ND f [...]
@ Dylan toh
Other gears
- Tripod
For very long durations, the camera is prone to shaking. This is particularly problematic in windy conditions or shooting in the sea. You need to have a firm and steady tripod in order to achieve a good quality long exposure image.
- Remote shutter / Cable release
In order to shoot long exposures, the shutter button needs to be depressed for the entire duration. It is simply not practical to hold your finger down for several minutes as camera shake will likely occur. Using a remote shutter control is therefore essential for shooting in bulb mode.
NiSi S5 Filter System and the Sony FE 12-24 F4 G
by Dylan Toh
