Saturday, September 6, 2008

Macro with a Sigma 70-300mm F4-5.6 APO DG MACRO lens

The Sigma 70-300mm F4-5.6 APO DG MACRO lens has a macro mode that may be difficult to switch on and use. It is only available when the focal length is between 200 mm and 300 mm.

The switch on the lens cannot be changed to "Macro" when you take the lens out of the box, as the focal length is at 70 mm .

Only once you have zoomed to a higher focal length than 200, you can change the switch.

You now have a minimum focusing distance of 95 cm. Without macro mode, the minimum focusing distance is 150 cm, as with a lot of other 70-300 mm lenses, like Nikon's own one. In other words, you can get much closer to the subject with the Sigma.

If you now rotate the focus ring to a smaller distance than 150 cm, then you cannot switch macro mode off. To switch back to normal mode, you first have to rotate the focus ring to a distance above 150 cm.

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