EX DC OS HSM, what does these abbreviation means??

EX is Sigma's pro series lens (called EX finished), DC means it is for crop sensor cameras (DG for full frame), OS stands for Optical Stabilization (Image Stabilization) and HSM means it has hypersonic AF motor which is driven by untrasonic waves to provide a quiet operation.

Is it work with Canon 5D mark II?

It should work but it's not the best choice. The 5D is a full frame camera, and the Sigma is for APS-C sensors (smaller sensor). You will see vignetting (black area at edge of picture). You should consider the Sigma 24-60mm 2.8 instead, or check this list for other Sigma lenses for full frame cameras: http://www.amazon.com/Canon-Full-Frame-Lens-Substitutes-Sigma/lm/R1XMV8PZXQALTP

Does this lens work on the 70D? Looks like it'd be a great lens for video and stills.

Yes it does work and it is a great lens.You will be happy with the picture quality and sharpness.

Please tell me if this 1 more expensive lens could be used to obtain the similar quality images than 3 less expensive lenses that I am looking at -- 35mm prime f/2.4, 50mm prime f/1.8, the kit 18-55mm lens. I am on a budget and new to SLRs...thanks in advance.

I haven't used the 35mm but i can assure you the image quality is better than the 50 f1.8 or the kit lens. This sigma will serve you well as a starter lens and actually shouldn't be something you immediately feel like upgrading. Primes are well and good if you are ready for them but zooms are better for starting out. if you test out different focal lengths you can find out what prime lenses will work best for you. you don't want to buy a 35mm just to find out you'd rather have a 24, etc.

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17-50mm F2.8 EX DC HSM for Sony Fit

Product ID: 50860541

Details

Brand
Sigma
Camera lens description
50mm
Compatible mountings
'Sony A-Mount'
Focal length description
17-50 mm
Focus type
Auto Focus
Lens design
Zoom

⚡Fast F2.8 constant aperture

🌈2 FLD + aspherical elements for sharpness

🎯HSM ultra-quiet autofocus

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Description

📸 Elevate your Sony shots with pro-grade clarity and speed — don’t just shoot, own the moment!

CRYSTAL CLEAR OPTICS - Two FLD low dispersion glass elements plus hybrid aspherical lenses eliminate chromatic aberration and distortion for razor-sharp images.
COMPACT TRAVEL READY - Lightweight 565g design fits perfectly in your camera bag—ideal for professionals on the move.
WHISPER QUIET HSM AUTOFOCUS - Stay stealthy and sharp with Hyper Sonic Motor tech delivering fast, silent focusing for every decisive moment.
VERSATILE 17 50 MM ZOOM RANGE - From sweeping landscapes to intimate portraits, this lens covers all your creative bases with superior edge-to-edge brightness.
BRIGHT CONSISTENT F 2 8 APERTURE - Capture stunning low-light shots and creamy bokeh with a constant wide aperture across the zoom range.

The Sigma 17-50mm F2.8 EX DC HSM for Sony Fit is a high-performance zoom lens designed for APS-C DSLR cameras. Featuring a constant bright F2.8 aperture, advanced FLD low dispersion and aspherical glass elements, and a fast, quiet Hyper Sonic Motor autofocus system, it delivers sharp, high-contrast images with minimal chromatic aberration. Its compact, lightweight build and versatile focal range make it perfect for travel, portraits, and landscapes, while the Super Multi-Layer Coating ensures reduced flare and ghosting for professional-quality results.

Specifications

ASIN	B006G7WQOY
Best Sellers Rank	116,107 in Electronics & Photo ( See Top 100 in Electronics & Photo ) 1,310 in Camera Lenses
Brand Name	Sigma
Camera Lens	50mm
Colour	Black
Compatible Devices	Sony (D)
Compatible Mountings	'Sony A-Mount'
Customer Reviews	4.1 4.1 out of 5 stars (92)
Exposure Control Type	Automatic
Fixed Focal Length	50 Millimetres
Focus Type	Auto Focus
Global Trade Identification Number	00085126928636
Image Stabilization Type	4 stops claimed
Item Weight	565 Grams
Lens Coating Description	Super Layer Coating
Lens Design	Zoom
Lens Mount	Sony A
Lens Type	Zoom lens
Manufacturer	Sigma
Manufacturer Part Number	17-50mm F2.8 EX DC
Maximum Aperture	2.8 f
Maximum Focal Length	50 Millimeters
Media Type	ProductImage
Minimum Aperture	22.0
Minimum Focal Length	17 Millimeters
Model Name	17-50mm F2.8 EX DC HSM
Model Number	58C205
Model Series	EX DC
Number of Diaphragm Blades	7
Number of Items	1
Number of Packs	1
Photo Filter Size	77 Millimeters
Real Angle Of View	72.4 Degrees
Screen Size	3 Inches
UPC	085126928636 085126583620
Unit Count	1.0 count
Zoom Ratio	3

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$1073.52

Duties & taxes included

In stock

Sold byAmazon USADelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to USA.

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TrustScore 4.5 | 7,300+ reviews

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