Anyone know anything about this lens

moojii

moojii

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Hi. I have just bought a sigma 24-70d 2.8 ex dg.

It's the type with the push/pull mechanism to switch between af and manual.
Also when it us at 24 mm the lens is at it's longest which is kinda backwards.

Does anyone know when it was produced and if it works on a full frame camera.

It seems to work well and is really sharp.

Any info is really appreciated.
 
moojii said:
Also when it us at 24 mm the lens is at it's longest which is kinda backwards.
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Its a common feature of 24-70s. The Canon is the same. No idea why.

One way to find out if its any good .......
 
They are still producing them now. The DG indicates it is suitable for full frame cameras. DC indicates cropped cameras.
I have the 24-60mm which was produced before this and it is a superb lens.
 
I think they were first produced in 2002, but only recently upgraded with HSM motors.
 
Strangways said:
They are still producing them now. The DG indicates it is suitable for full frame cameras. DC indicates cropped cameras.
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Just for completeness, DG indicates a Digital lens coating, not suitability for Full-Frame. DC does indeed indicate use with cropped camera's. As long as the Sigma lens does not have DC in the name it will work fine on Full-Frame. :)
 
moojii said:
Also when it us at 24 mm the lens is at it's longest which is kinda backwards.
Click to expand...

It's because of the hood, at 24 you have to have a shorter hood else you'll catch the edge on the corners of your photographs, whereas at 70mm (the front element retracts) and thus allows the hood and front of the len case to effectively combine to give a longer hood.
 
sdb123 said:
Just for completeness, DG indicates a Digital lens coating, not suitability for Full-Frame. DC does indeed indicate use with cropped camera's. As long as the Sigma lens does not have DC in the name it will work fine on Full-Frame. :)
Click to expand...

I do accept my explanation was brief, however DG does not just indicate the lens coating. Here is Sigmas explanation!

The DG designation indicates that the lens has been optimised for use with digital SLR cameras. The DG lenses feature improved (more even) light distribution from image centre to edge, especially at maximum aperture, compared to conventional fast wide-angle lenses. This is important in digital photography, but is also useful in 35mm photography, especially when slide film is used. The lens elements also utilise Sigma’s super multi layer coating which reduces flare and internal reflections from the highly sensitive surface of image sensors.
 
Lots of zooms at that level are wide at maximum extension, the reason is simple really, by extending out from the body they can peek out around the lens hood :thumbs:
 
I have the Sigma 24-70 Macro, while I cant comment on the real reason the 24mm is at the extended length i can say that it is not to "peak" around the lens hood. The hood is attached to the very front of the lens and is carried forward and back during zooming, no change in distance between it and the front element of the lens. I think the Canon 24-70 may "peak" as has been mentioned as the lens hood attaches behind the extending front part of the lens.
in the end though it doesnt really matter. It works.
Mine is pretty good though it back focusses quite badly at 24mm. The rest of the range is pretty good though, and overall it is quite sharp. the f2.8 allows for good perfomance in lower light conditions and by stopping down you can get some very sharp images in the higher zoom range, just don't expect too much at 24mm.
Cheers
 
I've got one an quite happy with it but it's gone tight on the zoom at the 24mm end. Anybody else experienced this and got any suggestions?
 
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