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Sigma 10-20mm f/3.5 EX DC HSM Lens Review

203_bigReleased earlier this year, the Sigma 10-20mm f/3.5 EX DC HSM is a mouthful to say but a true pleasure to work with.  I begrudgingly write this review because it means I have to send the test lens back to Sigma….

…and I really don’t want to!

I had the task of testing this lens on a recent trip through the Gulf Islands in British Columbia, Canada and would like to relate my findings ‘in the real world’.

But first, some of stats for those that thrive on numbers.

This lens has 13 elements in 10 groups.  If that doesn’t wow you, then maybe the fact that it has seven diaphragm blades will!  It weighs in at just over a lb/half kilo (18.3oz or 520g) and is 3.4″x3.5″ (87.3mmx88.2mm) small.  It uses an 82mm filter and comes with a petal-type hood.  Minimum focus distance is 9.4″/24cm and the field of view is an astounding 63.8-102.4 degrees.

Oh!  And to decipher the lens’ name:

  • 10-20mm – This lens zooms from 10-20mm.  That’s the easy one.
  • f/3.5 – This lens has a maximum aperture of 3.5 across the entire zoom range.
  • EX – Sigma has a special external coating showing its superior build.
  • DC – This is a lens intended for digital cameras with an APS-C size sensor.
  • HSM – Hyper-Sonic Motor.  While not silent, this motor is quieter than a standard zoom motor.

All of these stats can be had on Sigma’s website.  I hope I didn’t bore those of your not into stats.  If you’re still reading, let’s take a look at some photos!  WARNING: Images are 15MP large.  Clicking on each picture will download a full sized image.  All images are copyrighted by Hidden Creek Photography.

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Peter West Carey
Peter West Carey

leads photo tours and workshops in Nepal, Bhutan, Seattle, Portland, Los Angeles and beyond. He is also the creator of Photography Basics – A 43 Day Adventure & 40 Photography Experiments, web-based tutorials taking curious photographers on a fun ride through the basics of learning photography.

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