Triggertrap Mobile App Manual | Page 17
LE HDR (High Dynamic Range) Modes
LE HDR stands for Long Exposure High Dynamic Range. If
you’ve never tried HDR photography before, well, you’re in
for a treat. The point of HDR is to combine several
photographs taken at dierent exposures into one picture.
The result is that you can get photos with a very wide
dynamic range.
Dynamic range, in this case, means that you can take photos
that have full details both in the highlights (the bright bits of
your photos) and in the shadows. You do this by using the
dark information from bright images, and the light
information from dark images. When you combine the two,
you end up with a photo that could not have been taken in
any other way.
HDR photos come in ‘sets’, usually of an odd number of
photos (so, 3, 5, 7, etc). These ‘sets’ consist of a middle
exposure, which is usually the exposure suggested by your
camera, followed by exposures taken on either side of the
middle exposure.
So, if you were to take a 3-photo HDR set, with one EV
(Exposure Value) step, and a one second middle
exposure, your exposures would be 1/2 second, one
second, and two seconds.
Once you have all the photographs in your HDR set, you can
combine them in Photoshop, or a specialised HDR software
package like Photomatix Pro.
REMEMBER
To use this mode, your camera needs to be set to Bulb mode.
Please see page 20 for more information about setting your
camera to Bulb.
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