Nokia 1020 A00014540 Benutzerhandbuch
Produktcode
A00014540
The advantages of the Nokia Lumia 1020 zoom compared
to an optical zoom are:
to an optical zoom are:
•
The aperture size of a typical optical zoom drops
dramatically when zoomed in. For example, a typical
optical zoom can have aperture size f2.8 in wide, but
it can drop to f6 in tele. This means that the camera
needs almost a five times longer exposure time in the
tele position. The problem is multiplied by the fact
that the camera is most prone to hand-shake in the
tele position – and the user should actually use short-
er exposure times to avoid blurred images. In the Lu-
mia 1020, the aperture size and exposure times stay
the same throughout the zoom range.
dramatically when zoomed in. For example, a typical
optical zoom can have aperture size f2.8 in wide, but
it can drop to f6 in tele. This means that the camera
needs almost a five times longer exposure time in the
tele position. The problem is multiplied by the fact
that the camera is most prone to hand-shake in the
tele position – and the user should actually use short-
er exposure times to avoid blurred images. In the Lu-
mia 1020, the aperture size and exposure times stay
the same throughout the zoom range.
•
The smaller aperture size required for telephoto
shots with an optical zoom camera increases diffrac-
tion which can make images blurry even when there is
no hand-shake.
shots with an optical zoom camera increases diffrac-
tion which can make images blurry even when there is
no hand-shake.
•
The optics in Lumia 1020 are simplified and robust
compared to optical zoom – a key enabler for the
compared to optical zoom – a key enabler for the
amazing image sharpness.
•
As the Nokia Lumia 1020 is based on a huge image
sensor, it enables much higher performance and
oversampling in the wide-angle position.
sensor, it enables much higher performance and
oversampling in the wide-angle position.
•
Lumia 1020 macro distance stays the same through-
out the zoom range.
out the zoom range.
•
As the zooming is done without mechanically moving
any parts, it is silent, fast, and intuitive. Additionally
the Lumia 1020 slide zoom can be operated by using
one hand only.
any parts, it is silent, fast, and intuitive. Additionally
the Lumia 1020 slide zoom can be operated by using
one hand only.
•
Dual capture allows for post capture zooming and
reframing . More on this in the reframing section on
page 12
reframing . More on this in the reframing section on
page 12
getting rid of hand-shake
Lens design and sensor resolution are often the only fac-
tors considered when discussing camera sharpness, but
an equally important factor is totally neglected – hand-
shake. Even the sharpest optical systems in the world
can’t capture a sharp image if the camera is moved during
capture. We have implemented a completely new OIS sys-
tem to overcome this. In traditional SLR OIS systems just
one lens element in the lens stack is moved to counteract
hand-shake, but in our OIS the whole optical assembly is
moved to cancel out unwanted camera movements. What
tors considered when discussing camera sharpness, but
an equally important factor is totally neglected – hand-
shake. Even the sharpest optical systems in the world
can’t capture a sharp image if the camera is moved during
capture. We have implemented a completely new OIS sys-
tem to overcome this. In traditional SLR OIS systems just
one lens element in the lens stack is moved to counteract
hand-shake, but in our OIS the whole optical assembly is
moved to cancel out unwanted camera movements. What
4:3 Full Resolution
16:9 Full Resolution
5 MP, 3x zoom
720p, 6x zoom
7136
7712
5360
4352
Figure 6. The high resolution zoom is limited to 3X for stills, ensuring that the output is 5MP. Full HD video can be zoomed 4X
whereas 720P video has 6X zoom.
this means is that we are able to cancel out larger move-
ments compared to traditional OIS systems, enabling su-
per-sharp images.
ments compared to traditional OIS systems, enabling su-
per-sharp images.
Technically our OIS is the barrel shift type first seen in
the Nokia Lumia 920. (Other ways of making optical im-
age stabilisation systems include barrel tilt, sensor tilt
or module tilt, but for our purposes barrel shift gives
the best quality.) In the Lumia 1020 the optics are much
bigger, and adding OIS technology to optics of that size
required some really clever engineering: the whole lens
system is resting on top of ball bearings and is actively
the Nokia Lumia 920. (Other ways of making optical im-
age stabilisation systems include barrel tilt, sensor tilt
or module tilt, but for our purposes barrel shift gives
the best quality.) In the Lumia 1020 the optics are much
bigger, and adding OIS technology to optics of that size
required some really clever engineering: the whole lens
system is resting on top of ball bearings and is actively
8