Sigma 346934 Specifications download pdf (Page 4)

Sigma DC Lens for Digital SLR Camera

Sigma DG Lens for Digital SLR Camera

Sigma DG Lens

The dedicated SLR lens line

with full-frame sensor coverage

Designed to deliver the ultimate in performance

on full-frame digital SLRs, Sigma DG lenses also

bring out the best in 35 mm SLR ﬁlm cameras and

APS-C size DSLRs. Remarkable image rendition

is achieved by comprehensive correction of

aberrations and distortions. Special care was taken

to thoroughly minimize color fringing caused by

lateral chromatic aberration which is particularly

noticeable at high resolution in digital photography.

DG lenses can oer both high contrast and subtle

tonal gradations, unmarred by ﬂare and ghosting,

thanks to Sigma's digitally-optimized optical design

and original Super Multi-Layer Coating technology

which suppress reﬂections between image sensor

and lens surfaces. Large image circles assure ample

peripheral illumination to prevent vignetting.

Optimized for DSLRs with APS-C size image sensors,

Sigma DC lenses leverage original technology

fostered in the development of Sigma SD series

cameras. The conﬁguration of lens elements and the

lens coatings represent the culmination of decades

of optical engineering experience. The result is truly

excellent performance in a compact, lightweight

format that oers outstanding ﬂexibility to the

serious photographer.

Sigma DC Lens for Digital SLR Camera

Sigma DC Lens

Optimized for DSLR cameras

using APS-C size sensors

*DC lenses have an image circle that covers APS-C size image sensors. Not for use on digital

cameras having image sensors larger than APS-C size or on 35 mm or APS film cameras, as

vignetting will occur. * To find the 35 mm camera equivalent focal length, multiply the DC lens

focal length by the “crop factor” (digital multiplier) of 1.5, 1.6 or 1.7, depending on the brand of

DSLR camera on which the lens will be used. To find which DC lens is equivalent to a full frame

lens, divide the focal length of the full frame lens by the same crop factor.

Sigma’s professional-grade prime

lenses and wide-aperture zoom lenses

that maintain their maximum f-stop

regardless of zoom position.

EX Lens

This indicates a lens that will accept

available Sigma APO Teleconverter

attachments, which increase focal

length and support AE (automatic

exposure) operation.

Teleconverter-Compatible Lens

CONV

Aspherical lenses oer greater

design latitude, raise performance,

permit use of fewer lens elements

and allow a more compact size.

Aspherical Lens

ASP

Sigma’s top-of-the-line telephoto

lenses use at least two elements of

ELD, FLD, SLD or other low-dispersion

glass to deliver impeccable image

quality unsullied by chromatic

aberration.

APO Lens

APO

An optical stabilizer mechanism

built into the lens helps assure

a sharp image while giving you

freedom of movement and more

latitude in camera settings.

Optical Stabilizer

Using a motor driven by ultrasonic

waves, these lenses oer speedy auto

focusing and quiet operation.

Hyper Sonic Motor

HSM

Locating the focusing elements

in the rear portion of the lens

contributes to faster auto focusing

and reduced noise.

Rear Focus

To increase stability, this lens

conﬁguration uses movable internal

lens elements that adjust focus

without changing the length of the

lens barrel.

Inner Focus

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Sigma 346934 Specifications Page 4

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