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http://snapsort.com/learn/image-stabilization
Short Description
Image stabilization prevents blurring images from camera shake. It's
especially important to have image stabilization when buying a large zoom
camera, or when shooting in low light situations because the images are at
significant risk of being blurred. There are different types of image
stabilization. Lens stabilization is the best, senor stabilization second
best and digital stabilization the worst. If image stabilization is
important to you than we recommend either lens or sensor based stabilization
and don't recommend digital image stabilization.
Lens Stabilization
Lens based stabilization is the best and most versatile option. A portion of
the lens group is typically moved horizontally and vertically to compensate
for vibration/shake, depending on the implementation accelerometer, gyros
and electro magnets and tiny motors do the work. Fortunately lens based
image stabilization is not that expensive of an addition to most digicams
but it can be with SLRs because each lens requires it. Since mid to high end
dSLRs don't have image stabilization built into the body the only way to
get image stabilization is to buy lenses with it built in - the cost of this
adds up over time. SLRs with sensor shift can avoid this price premium on
each lens. Nonetheless lens based image stabilization is king and that's why
the most camera manufacturers use it in their best cameras. Additionally,
it is the only option that provides stabilization during video recording.
Sensor Shift
Sensor shift can provide excellent results and provides a means of giving
non image-stabilized lenses free image stabilization, this can lower the
cost of your lens collection significantly and instantly modernize a
collection of vintage glass. Some very high end full frame cameras do use
sensor shift so it is indeed a viable option, although it is still largely
used by the smaller makers of dSLRs, namely Sony and Pentax. Its use in
digicams is more widespread. Sensor shift detects vibrations and physically
adjusts the position of the image sensor accordingly to cancel out shifts in
the image. One disadvantage to sensor shift is the image in the viewfinder
is not image stabilized which can make composition harder. A further
disadvantage is the inability to use image stabilization during video shoots
as the image sensor typically must be locked. Finally auto focus
performance in low light can suffer in cameras using phase-detection auto
focus (typically SLRs). |
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