Sony SEL90M28G Manual page 4

5. Turn on the camera.
The troubleshooting steps listed above should resolve your issue. If you have completed all of
the steps and the issue is not resolved, service may be required.
What is the difference between an A-mount
and an E-mount?
For interchangeable lens cameras produced by Sony, there are two types of mount standard: A-
mount and E-mount.
The mount is the part that joins the camera's body and the lens. To shoot images, attach the lens
to your camera's lens mount and let the lens and the body recognize each other.

A-mount (ILCA-xx, DSLR-Axx, SLT-Axx)
Mount standard adopted on models that have a mirror or a translucent mirror.

E-mount (ILCE-xx, NEX-xx)
Mount standard adopted on mirrorless models.
[1]Mount on an A-mount body
[2]Mount on an E-mount body

A-mount and E-mount features
A-mount cameras with Sony Translucent Mirror Technology offer the advantages of full-
time phase-detection autofocus. The short flange back distance of mirrorless E-mount
models makes it possible to design compact, high-performance bodies and lenses that
offer outstanding handling and mobility.