Reviews and Problems with Sigma 20mm F1.8 EX DG ASPHERICAL RF
Showing 1-10 of 41
19 February 2014
Summary: Overall its a good lens. auto-focus is pretty crappy sometimes when you're trying to catch something fast. Loud autofocus when its on video mode, but manual focusing is pretty quiet and smooth. Pictures come out clear, get a good wide angle without distortion like a fish-eye lens.
Summary: This is for a Canon mount. All the other reviews pretty much sum up this lens. On APS-C it crops out the ugliness of the smeared corners. I can't get a sharp pic in any corner at any aperture on FF. On APS-C it's a different story. Just use f5.6 for everything and you will be ok.
Summary: Huge Objective for Light Gathering! I Don't Manually Focus Very Often My Judgement is Not That Good with My Eyes Anymore. Sometimes Hunts A Long Time to Focus in Auto Mode! But That's Rare, Most of the Time... Fine! I Do a Lot of Close-Up and Sometimes Large Group Candids. Perfect Lens for This!
Summary: I am using 2 Sigma 14mm lenses for time-lapse photography in our earthquake test lab. They provide a view of the entire lab without fisheye distortion. The quality of the images, using Canon 450D cameras is good.
Summary: This lens is physically about the same size and weight as the canon 17-40L lens. They have similar central sharpness at f4.0 but the sigma corners are fairly soft, and no way as crisp as those on the canon 17-40L lens.
Summary: I recently purchased this lens, so I don't have a lot of shutter time with it yet, but thus far, I'm very pleased with it. I use the lens on both a Nikon d300 and a Nikon d700. I was pleasantly surprised to see that the lens is quite sharp wide open, at f/1.8.
Summary: Definitely one of the better sigma lenses. Sigma has always been hit or miss for me. This lens is a hit. Very sharp and very wide. Barely under fisheye. oh did I mention it is very, very wide? I love it.
Bulky but very useful for available-light shooting
Chris B., Amazon
7 January 2009
Summary: I had been using a Pentax-M 50mm f/1.4 and loved the ability to shoot in low light. However, the -M lenses are manual focus and manual aperture, and I was getting too many out-of-focus shots that I regretted missing (I'm taking a lot of baby shots lately).
Summary: Tried three copies of this lens. Great specifications. Nothing else is this fast at this width and this price. The image is acceptably sharp wide open, but only just -- definitely nothing like Sigma 30mm 1.4, which beats this lens hands down in everything but the width.