Sigma 150 mm f/2.8 EX DG HSM APO Macro review - Build quality

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Sigma 150 mm f/2.8 EX DG HSM APO Macro

16 April 2010

Arkadiusz Olech

3. Build quality

The build quality, as it befits the EX series instrument, is very high. The casing is stylish and solid, equipped additionally with a tripod adapter included in box. On the one side we have a metal mount on the other – a non-rotating filter thread which is 72 mm in diameter. The lens doesn’t change its dimensions on focusing as all optical elements shift inside the casing.

Sigma 150 mm f/2.8 EX DG HSM APO Macro - Build quality

Typically for Macro lenses the autofocus mode switch is also situated on the casing. You can limit the tested Sigma focus distance range to between 38 cm and 52 cm, 52 cm and infinity - or the full range can be allowed (FULL option).

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The lens is a bit on the big side due to its focal length and good fastness. The picture below shows a comparison between its dimensions and those of a Canon EF-S 18-55 mm and a Canon 70-300 mm IS USM.

Inside the lens we’ll find 16 elements in 12 groups and an aperture with nine diaphragm blades which can be stopped down to f/22. To deserve three APO letters on the casing the manufacturer decided to use two low-dispersion glass (SLD) elements as well.