Reviews and Problems with Sigma MACRO 70mm F2.8 EX DG
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Sigma 70mm f2.8 EX DG Macro
15 June 2010
Excerpt: Think of a dedicated macro lens and chances are your first thoughts will be of one made by your particular camera-maker. All the big names make a range of focal lengths, usually based on the old 35mm film format with focal lengths of around 50mm, 100mm and 200mm. That’s fine if you have one of the full-frame DSLRs but if you’re selecting the coverage (or angle/field of view) based on one of these ‘classic’ focal lengths for an APS-C size cropped camera, you
Excerpt: Sigma have slotted this lens into the already crowded macro lens market, and with a focal length of 70mm, it sits comfortably between shorter 50mm or 60mm macro optics and the popular 90-105mm lenses where the slightly longer focal length will provides a more comfortable working distance. Priced at around £380, it is currently the same price as Sigma's 105mm macro offering.
Pros: Excellent resolution, right from F/2.8, Very good control of colour aberrations, Low distortion, Good value for money
Cons: Manual focusing experience not as pleasant as similar optics, Focus ring rotates during AF
Excerpt: While many SLR users have traditionally favoured a 105mm macro lens, once mounted on a DSLR with an APS-C sensor 105mm lenses essentially become 150mm lenses, which many photographers find too long for the pictures they want. Sigma has recognised this need and added the new Sigma 70mm f/2.8 EX DG to its line-up as it essentially becomes a 105mm on-camera.