Rekan-rekan,
Ada yg punya pengalaman dg lensa tersebut? Bagaimana plus minus-nya? Harganya ? Apa beda DF dan DG ?
Terima Kasih banyak untuk infonya.

Salam,
Rudi K

DG itu 'for digital' .............di website sigmaphoto.com dijelasin kok.semua singkatannya

Arie:
DG itu bukannya compatible? Artinya bisa untuk 35mm ataupun untuk digital.
Kalau gak salah yang khusus 'for digital' itu yang DC( Semacam EF-S nya Canon)

DF, kalau gak salah maksudnya DUAL FOCUS.

Sigma 28-70mm F2.8 EX DG
Lens Construction
14 Elements in 12 Groups
Angle of View 75.4 - 34.3 degrees
Number of Diaphragm Blades 9 Blades
Minimum Aperture F22
Minimum Focusing Distance 33cm
Maximum Magnification 1:4.4
Filter Size Diameter 67mm
Dimensions Diameter 74mm X Length 87.2mm
Weight 510g
Corresponding AF Mounts SIGMA,
CANON, NIKON (D), MINOLTA, PENTAX
Nikon and Pentax mount lenses do not have an aperture ring.
LENS TECHNOLOGY
ASP (Aspherical Lens)
The aspherical lens complex allows freedom of design, improved performance, a reduced number of component lenses and a compact size.

APO (APO Lens)
In order to attain the highest quality images, the APO lens has been made using special low-dispersion (SLD) glass and is designed to minimize color aberration.

OS (Optical Stabilizer) Function
This function utilizes a built-in mechanism that compensates for camera shake. It dramatically expands photographic possibilities by alleviating camera movement when shooting by hand held camera.

HSM (Hyper-Sonic Motor)
This lens uses a motor driven by ultrasonic waves to provide a quiet, highspeed AF.

RF (Rear Focus)
This lens is equipped with a system that moves the rear lens group for highspeed , silent focusing.

IF (Inner Focus)
To ensure stability in focusing, this lens moves the inner lens group or groups without changing the lens' physical length.
Conv (APO Teleconverter EX)
This lens can be used with the APO Teleconverter EX. It can increase the focal length and will interface with the camera's AE (automatic exposure) function.

EX (EX Lens)
The exterior of this lens is EX-finished to denote the superior build and optical quality, and to enhance its appearance.

DG (DG Lens)
These are large-aperture lenses with wide angles and short minimum focusing distances. With an abundance of peripheral illumination, they are ideal lenses for Digital SLR Cameras whilst retaining suitability for traditional 35mm SLRs.

DC (DC Lens)
These are special lenses designed so that the image circle matches the smaller size of the image sensor of most digital SLR cameras. Their specialized design gives these lenses the ideal properties for digital cameras, the compact and lightweight construction is an added bonus ! including compact and lightweight construction.

sorry,kekirim dua kali.
buat nikon katanya kaga ada aperture ringnya,ga bisa rear fokus(RF)
cuma IF,aja.makanya saya mending bli lensa kit-nya sih.
lens kit-nya lebih sharp,biarpun ga punya f2.8 .