Sony NEX-EA50 NXCAM Handbook page 21

SEL1018 zoom lens (E10 – 18 mm F4 OSS)
The SEL1018 is a super wide angle E-Mount type zoom lens with
a zoom range from 15 mm super wide angle (converted to 35
mm format) to 27 mm standard wide angle. The optical system,
featuring a combination of three aspherical lens groups and
super ED glass, corrects aberrations at the super wide angle end
to ensure optimum contrast. The full open f-stop 4 is ideal for
dynamic scenery as well as limited-light settings such as sunsets.
The SEL1018 has built-in optical stabilization and a spherical iris
for superior "bokeh" effect.
Carl Zeiss E-Mount lenses
Carl Zeiss E-Mount lenses are also available.
Touit Auto Focus lenses
32mm F1.8
Touit lenses are manufactured to very high standards, and are
compatible with auto systems including electronic focus and
iris controllers.
Shorter flange back distance to accommodate wider interchangeable lenses
The distance from the lens mount plane to the image sensor, called the flange
back distance, is different for every lens mount. If the flange back distance
is too short for the lens mount, a mount adaptor must be fitted. The NXCAM
E-Mount lens has a short flange back distance of just 18 mm, which means
that it can accommodate a variety of different lenses using mount adaptors.
12mm F2.8
Compact Prime CP2 lenses are entry-level cinema lenses with
a strong design emphasis on manual control.
The focus and iris rings have good iner tia feel, and are
physically located in the same position on every model, which
makes it easier to set up follow focus.
19 19
Compact Prime CP.2
15mm /T2.8
18mm /T3.6
21mm /T2.9
25mm /T2.1
28mm /T2.1
35mm /T2.1
50mm /T2.1
85mm /T2.1
100mm /T2.1
135mm /T2.1
Lens Camera body
Sensor
Flange back 18 mm