Sigma A 14-24 mm f/2.8 DG DN
3. Build quality
In the photo below the Sigma A 14-24 mm f/2.8 DG DN is positioned next to full frame Sigma A 35 mm f/1.4 DG HSM designed for reflex cameras.
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The first part of the proper barrel consists of a sleek, black, metal ring which quickly and smoothly increases its diameter. On the ring you can find: a white dot, making the alignment with a camera easier, „019” marking the model year of the instrument, an inscription „MADE IN JAPAN”, and the focusing mechanism working range - „0.28M/0.92FEET–∞”.
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Further on you see an immobile part covered by plastic with the company's logo, the name and parameters of the lens, its serial number, fine ribbing, „A” symbol, meaning the lens was qualified as an A series device, and two controls. The first of them – the AF/MF FOCUS- is used for choosing the focusing mechanism mode and the second one – the AFL button – allows you to lock and recall a specific autofocus position. Other functions can be attributed to it as well.
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The lens's body ends with a petal-type hood made of plastics which surrounds a noticeably convex front element, 63 mm in diameter. The front element changes its position and is the most extended at the 14 mm focal length.
The lens's casing is supposed to be dust- and splash proof with water- and oil-repellent coating on the front element which also ensure more comfort in taking photos in different conditions. There is also a build-in rear filter holder with a fall prevention lock for attaching sheet-type gel filters.
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It's worth mentioning that usual antireflection coatings this time are paired with the new NPC technology (Nano Porous Coating) which contains porous nano-particles of silicon in the coating material.
Buyers get both caps and a pouch in the box.
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