Splash Magazines

Sigma 17-70 DC Macro Lens Review – A Near Professional Macro Standard Lens

By Quang Bui

View the Full Article | Return to the Site

The Sigma 17-70mm f/2.8-4.5 Macro DC lens is very similar to the standard lens you get with most camera kits but much better. This is a Sigma DC lens has a Max Aperture of f/2.8-4.5. It uses 72mm filters and has Sigma, Canon, Nikon, Pentax, and Minolta mounts. This isn’t rated as a professional lens but it’s a consumer lens that’s very close to professional quality.

Note that this is a DC lens so that means it’s designed only for DSLRs. These DC lenses will cut off the picture on a normal SLR since DSLRS usually have a smaller sensor. Like all DSLRs they will magnify the lens. The 35mm equivalent is about 24-105mm.

The lens is plastic with a metal mount and includes a petal hood. There is a manual/autofocus switch which also locks the lens from extending. This allows you to get as close as 7.9 inches away from what you want to focus on. It has a maximum magnification of 1:2.3 which is very close to a professional macro lens. It uses A Special Low Dispersion lens with coating which correct various aberrations. The coating also gives the lens a very professional sharpness and quality.

As I carried around the lens it didn’t creep out my entire time testing it. This lens is a good standard lens to carry around at all time with the ability to use Macro. When you zoom out to the 80mm the lens sticks out an additional 5cm from the barrel. It uses 72mm filters which are expensive but the reason it has an better then usual maximum aperature of f/2.8-4.5.

It has an internal focus mechanism. When zooming the front of the lens doesn’t rotate which is a plus. The motor is also relatively quite although it’s not specifically a HSM Lens.

Overall this is a very sharp lens. This sharpness is very important for a macro lens. It maintains it’s sharpness at both extremes of the lens very well.   There isn’t really much of a distortion problem and it’s only worst at the widest angle which really isn’t much. Just beware about shooting straight lines at the 17mm mark. This lens performs well above the standard lenses in the same zoom range. You might also notice a little vignetting at the 17mm mark.

The f/2.8 comes in handy a lot. When your indoors somewhere you can feel free to shoot without flash. This can be good for parties when your up close to people all the time with some moderate lighting.

Most kits come with an 18-55 3.5-5.6 lens. This lens gives users a nice larger aperture and a longer zoom from their basic standard lens. It also gives users a nice close up Micro. The Micro isn’t really a true micro but its close enough for a consumer. The special sigma coatings give the lens a nice anti flare and ghosting trait that make it a near professional quality lens.

This lens retails for $590 dollars and has a street price of about $350 dollars for a near professional lens. You can find more about this lens at www.sigmaphoto.com

 

Specifications

Lens Construction

15 Elements in 12 Groups

Angle of View

72.4 - 20.2 degrees (Sigma SD format)

Number of Diaphragm Blades

7 Blades

Minimum Aperture

F22

Minimum Focusing Distance

20cm/7.9 in.

Maximum Magnification

1:2.3

Filter Size

Diameter 72mm

Dimensions

Diameter 79mm X Length 82.5mm

 

3.1 in. X 3.2 in.s

Weight

455g/16.0 oz

Corresponding AF Mounts

SIGMA, CANON, NIKON, SONY/MINOLTA, PENTAX

 

Published on Sep 10, 2007

View the Full Article | Return to the Site