Reviews and Problems with Sigma MACRO 70mm F2.8 EX DG
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Sigma 70mm F/2.8 EX DG Macro Lens for Sony Digital SLR Cameras
John L. Summers, Amazon
8 April 2014
Summary: I purchased this to use with a NEX-7. The 70mm Sigma is tops. The macro function is superb. The lens is quick to focus and very precise. I reviewed several newer 85mm with brighter lens. This older 70mm was rated higher in reviews and by those who purchased it. I like the 70mm as it converts to a 105mm on my NEX. Sigma is on a real roll producing quality lens.
Summary: I borrowed a friend's last year to do some 1:1 copies of old 35 mm slides. Very sharp corner to corner, very little distortion. Yes as others have said a bit noisy and slow on focusing but for my purposes that is no problem.
Summary: Bought this lens for a Pentax K mount camera. It works exceptionally well, is solidly built and quiet when focusing. The IQ is brilliant. Bokeh smooth & pleasing. Sharpness is incredible. This lens really brings out the stupid in my cat's face.
Summary: I'm still testing this out, have only had about 3 to 4 weeks now but so far I am impressed. Very sharp and clear macro images. It doesn't seem to hunt as bad as some were stating in reviews and I have not really had to put it on Limit. So far I think it was an excellent buy for the price.
Summary: This lens works well for portraits as well as close-up or macro photography. The f/2.8 is a large enough aperture for most all macro work. While a larger aperture might allow for slightly faster shutter speed it would still be necessary to use a tripod to insure the sharpest possible photo when shooting this close which more than offsets the small gain in shutter speed. The lens is sharp and crisp from edge to edge.
Summary: Yes it's slow, noisy, and then there's the lens hood issue, (lens hood doesn't fit when the lens cap is attached). That's the bad news, the good news is this lens is razor sharp and super accurate. I use it on a full frame Canon body to produce beautifully clear images. Because of this lenses sharpness and precision I suggest using a tripod when doing any 1 to 1 macro work.
Excerpt: This lens spends a lot of time on my camera (Canon 40D)....It's more than a good quality macro lens, I've also used it as a portrait lens.. it works great... and if you have the nerve to get close it's a great street photo lens. At f2.8 it is great in low light. Buy it you won't be sorry.
Pros: Consistent Output, Durable, Fast / accurate auto-focus
Excerpt: I was looking for the best duality in a macro lens that would also be extremely good for portrait and landscapes. <br />With the ability selection built in, I can shoot macro of rings flip a switch on the lens and move immediately to portrait. On my Sony A77 with it's APS-C sensor, I have a 105mm focal length that captures tack sharp eyes.
Pros: Consistent Output, Fast / accurate auto-focus, Strong Construction
Versatile focal length, good build quality, excellent image quality
26 March 2013
Summary: I've been looking at this lens for quite some time, and it's not disappointing at all. The 1:1 magnification and 70mm focal length make this a double duty lens, great for portraits and macro and product photography. The weight is just right it feels like a well made dense lens, the quality expected for an "EX" class Sigma lens. Focusing is accurate, very quick considering the focus throw, limiter switch is useful and sharp at 2.8 but very sharp at f/4. Highly recommend.