Reviews and Problems with Sigma MACRO 105mm F2.8 EX DG
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Sigma 105mm f/2.8 EX DG Macro Lens Review
The Digital Picture
11 March 2016
Excerpt: The Sigma 105mm f/2.8 EX DG Macro Lens is - as you can discern from the name - Sigma's entry in the fixed short-telephoto focal length macro lens category. And in this case, Sigma means a true 1:1, close-up macro lens.
Excerpt: WHAT YOU SHOULD KNOW : This DG-designated lens, which replaces the non-DG version (tested August 1998), is optimized for digital SLRs. Optical improvements include a new 11-element, 10-group design (up from 10 elements in nine groups), to improve correction for lateral chromatic aberration and...
Excerpt: It is one of the most popular macro lenses around, and ePHOTOzine's Gary Wolstenhome checks it out Sigma's 105mm macro optic costs around £380, which is the same price as their more recently released 70mm F/2.8.
Pros: Good build quality, Easy to switch between manual and auto focus, Smooth manual focus action, Recessed front element reduces need to use supplied hood
Cons: Lacklustre performance at maximum aperture, Slow, noisy AF
Conclusion: A good lens made better. The improvement in contrast and extra control of flare and ghosting provided by the DG coating are, in themselves, worth the upgrade. Improvements have also been made to the hood along with a reduction, albeit slight, in the AF noise.
Pros: Very good optical performance throughout the aperture range, Edges as good as centre. (on APS-C sensor), Contrast and aberration control improved from older model, Value for money
Cons: AF still not lightning., Lens cap not useable with hood. (minor niggle)
Conclusion: If only Sigma decided to equip the 2.8/105 lens with an HSM motor we would have a nearly perfect device. Practically everything, concerning this lens, deserves our praise apart from the work of the autofocus.
Cons: slow, noisy and averagely accurate autofocus
Summary: This is a fine lens and for the price is excellent value for money. Optically it is as good as it gets and manually focussed there is nothing to complain about. But the auto focus issue is baffling. Our test cameras were two Canons – a 7D and a 5D MkII.
Pros: Optically this is an excellent lens with outstanding sharpness, contrast and colour fidelity. Sharpness is consistent across the entire image with no fall-off in the edges and corners and is also consistent at all focus points.
Cons: There is extreme focus hunting with low contrast subjects and even with ordinary contrast the lens can take its time finding a sharp focus. Given the fast aperture (f2.8) this inability to focus quickly is inexplicable. When we compared the Canon 100mm macro on the same camera body as the Sigma t...
Sigma AF 105mm f/2.8 EX DG macro (Nikon mount) - Review / Lab Test Report
14 May 2009
Conclusion: The Sigma AF 105mm f/2.8 EX DG macro is an excellent lens without any significant optical flaws. The resolution figures are excellent and neither distortions nor CAs nor vignetting is something to worry about.