Description
Macro
Lens
50mm f/2.8 EX DG
Optimized
optical design for digital SLR cameras. Sigma launched first standard 50mm Macro lens in 1990. This was succeeded
by the 50mm F2.8 EX Macro in 1998 which proved even more popular with
photographers, benefiting from improved build and optical quality. The advent of digital SLR's requires optimum lens performance and therefore
the very latest optical technology has been incorporated in the production
of the New Macro 50mm F2.8 EX DG. This ideal standard lens sets the benchmark
for digital SLR cameras.
Macro
lenses require a high imaging performance for photographing objects with
digital SLR cameras
The new advanced lens design corrects various aberrations. This macro
lens is specially coated to get the best color balance whilst cutting
down ghost caused by reflections from the digital image sensor. This lens
provides the utmost correction against lateral chromatic aberration which
is a serious problem for digital SLR cameras.
Floating
Focusing System
Floating Focusing system that enables this lens to photograph objects
precisely in entire focusing range.
Standard
50mm lens for digital SLR cameras
This standard macro lens enables you to enjoy the communication with subject.
When viewing through the camera's finder, you are able to move your subject,
and make precise adjustment. It has a close working distance and it is
very convenient for taking close-up pictures of a fossil, or other inanimate
things for example. This lens would have an equivalent field of view of
an 85mm macro lens on a digital SLR camera (when used with the SD10).
Minimum
aperture of F45
Although the depth of field this medium telephoto is shallow, sometimes
would be necessary to have greater depth of field, because it is difficult
to take a sharp picture of a subject and the background at the maximum
aperture. Minimum aperture of F45 (F45 for Sigma, Canon and Konica Minolta
mounts) or F32 (F32 for Nikon and Pentax mounts) provides greater depth
of field.
A
screw-in lens hood
A screw-in hood is included, for convenient use of circular polarizing
filters.
Specifications:
Lens
Construction |
|
10
Elements in 9 Groups |
Angle
of View |
|
46.8
degrees |
Number
of Diaphragm Blades |
|
7
Blades |
Minimum
Aperture |
|
F45 |
Minimum
Focusing Distance |
|
18.9cm |
Maximum
Magnification |
|
1:1 |
Filter
Size |
|
55mm |
Dimensions |
|
Diameter
71.4mm X Length 66.5mm |
Weight
|
|
320g |
| 
