Nikon D5500 - Manual (Page 408)

384 Technical Notes
❚❚ Using the Built-in Flash
When using the built-in flash, be sure the subject is at a range of
at least 0.6 m (2 ft) and remove lens hoods to prevent vignetting
(shadows created where the end of the lens obscures the built-in
flash).
❚❚ Vibration Reduction (VR)
Vibration reduction can be enabled by sliding the
vibration reduction switch to ON and takes effect
whenever the shutter-release button is pressed
halfway. Vibration reduction reduces blur caused
by camera shake, allowing shutter speeds up to 4.0
stops slower than would otherwise be the case (as measured at
55 mm with a DX-format camera according to Camera and
Imaging Products Association [CIPA] standards; effects vary with
the photographer and shooting conditions). This increases the
range of shutter speeds available.
Shadow Vignetting