Sigma Digital SLR Cameras
Sigma digital single-lens reflex camera (also called a digital SLR or DSLR) is a
digital camera that combines the optics and the mechanisms of a single-lens
reflex camera with a digital imaging sensor. The reflex design scheme is the
primary difference between a DSLR and other
In the reflex design, light travels through the lens, then to a mirror that
alternates to send the image to either the viewfinder or the image sensor. The
alternative would be to have a viewfinder with its own lens, hence the term
"single lens" for this design. By using only one lens, the viewfinder of a DSLR
presents an image that will not perceptibly differ from what is captured by the
Sigma DSLRs typically use interchangeable lenses with a proprietary lens mount.
A movable mechanical mirror system is switched down to direct light from the
lens over a matte focusing screen via a condenser lens. Most of the Sigma DSLRs
features a lightweight yet solid magnesium alloy body along with buttons and
connected parts sealed with O-rings, enhancing durability as well as preventing
dust and water from getting inside the camera.
Sigma DSLRs typically use autofocus based on phase detection. Phase-detection
autofocus is typically faster than other passive techniques. Microglobe offer
customers a highly portable and fast processing digital SLR camera that is
Sd Quattro Digital Camera.
Microglobe had the above Sigma DSLRs at affordable price. Microglobe is one of
the largest online store of the UK.