Triggertrap Mobile App Manual | Page 21
Setting your camera to Bulb mode
Most SLR and mirrorless cameras have a Bulb mode.
To enable this, set your camera to Manual exposure mode,
and choose the setting that’s slower than your slowest
shutter speed.
On most cameras, it goes from 30 seconds to show “B” or
“Bulb” in the display.
Please check your camera’s manual to find out how to set
your camera to Bulb mode.
Using ND (Neutral Density) Filters
Neutral Density filters are totally neutral filters that don’t
aect the colour of an image while they work like a pair of
darkened sunglasses to darken the exposure by blocking
some of the light entering the lens. This means you can use
them to do longer exposures than normally possible, which
is super useful for things like timelapses where you want to
get a specific shutter speed without using a small aperture.
There are two main types of ND filters. The most common
are standard ND filters which come in dierent grades
depending on how much light they prevent entering the
camera. They are often named by either an ND number or
by how many stops they cut. The description gives you an
idea of how much light will be cut out; for example a one
stop filter will remove one stop - this may also been known
as a 0.3ND or an ND2. A full list of how many stops each
filter cuts out is available here.
The range of filters goes from one stop to 10 stops.
However, 10 stop filters are very expensive and often hard
to come by.
The other option, which is extremely popular with
videographers is to use a variable ND filter. Variable ND
filters allow you adjust the density without taking the filters
o. These are often much more expensive, however you will
only need one filter rather than a full set of filters.
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