I first gave some serious thought to this little lens when I stumbled across an article written by Dylan Howell and read how much he raved about it. And since we're always trying to travel lighter and lighter with each new trip, I purchased one for myself before Rach and I set off for Vietnam earlier this year.
Shooting only primes for our wedding work and preferring larger apertures of around 1.4-1.8, I was a bit concerns with the slower aperture of this lens (f/2.8). But we shoot full frame cameras and pushing the ISO in our images isn't the biggest deal, so in the end, that really wasn't a deal breaker for us. And after shooting with it for two weeks on that trip, I was sold. It really is a perfect travel lens - it's wide enough for landscapes, great for portraits, and just fast enough for when the light gets a bit dark. AF speed is perfectly fine, it's quiet, and the image quality it produces is wonderful. For less than $200, it's really a no brainer. We've since bought another so Rach and I could both have one for when we hit the road, and I'll be hard pressed to take any other lenses along when we do. It's that good.
Pros: Inexpensive, great image quality, low chromatic aberration, decent build quality, small size, and light weight.
Cons: Fairly heavy vignette at f/2.8 (easily fixed or lightened in Lightroom), some might wish for a wider aperture, and that's about it.
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