Tamron 11-20mm f/2.8 Di III-A RXD lens review with samples
8 di3a rxd at 820, pounds in the uk or 830 us dollars its a pretty expensive Option for aps c shooters for sure, but to make up for that it does offer a brighter maximum aperture than usual f 2.8 across its entire zoom range. That means its letting in more light for shooting in darker situations and for video work and also f, 2.8. Will let you get more out of focus backgrounds when shooting closer to your subject and the lenses focal range covers the full frame equivalent of a nice 16.5 to 30 millimeter, very useful for all kinds of landscape and architecture? Photography, although you can get lenses even wider than this, by the way for those interested heres, what the image looks like when the lens is mounted on a full frame. Camera id like to thank tamrons, uk distributor for loaning me a copy of this lens for testing. Although, as usual, this is a totally independent review, the lens itself is fairly compact, considering its bike: maximum aperture, its not very heavy, weighing under 350 grams, its made of plastic with a nicely brushed finish, and it feels tightly assembled with weather sealing around the lens mount. The only controls on the lens are a zoom ring and a focus ring. The rubberized zoom ring moves quite smoothly without any kind of stickiness to it useful for video work. The plastic focus ring ditto. The lens exhibits some focus, breathing zooming in and out a little as you change focus but ive seen worse than this before the autofocus motor focuses accurately, silently and averagely quickly.
No problems here. The lens does not have image stabilization and its filter. Size is 67 millimeters. In common with most other lenses, tamon are releasing. Nowadays, it comes with a little plastic lens hood, as well as the usual lens caps overall, while the lens is hardly carved out of granite, it does feel nicely put together and handles great lets. Look at its image. Quality now ive mounted it onto a sony a5100 for this test. With its 24 megapixel aps c sensor in camera, corrections are turned on at 11, millimeter and f 2.8. The lens is razor sharp in the middle of your images with excellent contrast. The corners are soft. At f 2.8 the corners take this soft down to about f 8, where theres a slight improvement, stop down to f 11 and they get sharper again thats as sharp as those corners get at 11 millimeter. I should mention, though, that in my tests i noticed a bit of field curvature on this lens, so if you refocus it, those corners will become a little bit sharper, but the middle will lose just a little bit of resolution. Well lets zoom in to 20 millimeter. Now, at f 2.8, the middle of the image is still fantastically sharp, with excellent contrast. This time, the corner image quality is much better at f 2.8. Looking reasonably good stop down to f4 for some excellent sharpness in the image corners, the lens tastes as sharp down to f11, where a little softness begins to creep in due to the effect of diffraction.
So, overall, the lens has excellent contrast and is always razor sharp in the middle of your images at its widest angles, though, it does struggle a bit with corner sharpness and you have to either stop all the way down to f11 for sharp image corners at 11. Millimeter or readjust your focus and perhaps potentially sacrifice a little resolution in the middle, so that can be a slight nuisance for landscape photography in critical situations. Lets take a look at distortion and vignetting with in camera, corrections turned off at 11 millimeter. We see moderately strong bevel distortion and pretty dark corners at f, 2.8, stop down to f4 or f 5.6 to see those corners brighten up zoom into 20 millimeter, and that distortion, as you might expect, flips into a moderate, pin, cushion pattern. Vignetting is still noticeable at f, 2.8 and f4, but if you stop down to f8 or f11, then those corners brighten up so youll definitely want to keep in camera. Corrections turned on with this lens lets see about close up image quality. Now, if you zoom in to 20 millimeter, the minimum focus distance is a pretty impressive, 15 centimeters at f 2.8 close up image. Quality is really quite soft, stop down to f4 and it sharpens up a little but stop down to f516, and the image looks excellent again. If you zoom the lens out to 11 millimeter, you can actually get even closer to your subject right up against the glass of the lens virtually which, as you might expect, causes a problem for lighting your subject at f 2.
8, the close up image quality at 11. Millimeter is pretty hazy. F4 looks a little better but again stop down to f 5.6 for sharpness to make a nice return. So, wherever you zoom into, if youre, shooting up close, stop your aperture down when it comes to work against bright light, the lens gives us slightly below average performance. We see some notable flaring and reduced contrast here, whether youre zoomed out or zoomed in and while were working in the dark lets. Take a look at this lenss coma levels. The good news is that even at f 2.8 theres, almost no visible coma smearing on bright points of light in the corners of your images, lets zoom out a bit then and look at sun stars. Sun stars only really begin to emerge when youve stopped down to f8 at f11 and f16. They begin to look really impressive, though next up lets. Take a look at this lenss bokeh wide angle. Zoom lenses are hardly renowned for offering smooth autofocus backgrounds, not that its. The most important thing about them, but this tamron lens has no issues here at all. Those backgrounds always look lovely and soft. So overall, the tamon 11 to 20 millimeter, f 2.8 is an expensive lens for an aps c model, but it does have all kinds of nice features. It has that bright maximum app here it handles nicely and isnt too big and its always nice and sharp in the middle of your images.
It has low coma and potentially nice sun stars and nice bokker id be slightly more inclined to recommend this lens for video work. Where itll really shine, then i would for discerning stills photographers because its corner image quality at 11 millimeter is a little disappointing. Its a shame to need to stop down there for best image quality, not that that will bother landscape photographers too much though they tend to stop down apertures anyway, there are one or two other little image quality niggles that prevent me from highly recommending it at its Rather high price point, but its still really capable and enjoyable to use, so it does come recommended. I hope you found this review helpful.