8 stm, which is only for their full frame. Mirrorless eos r system cameras not for digital slrs. Its price is only 320 pounds in the uk or 300 us dollars, making it potentially a rare bargain from canon. One of my favorite things in the world are small, inexpensive lenses, especially with ultra wide angles and relatively bright apertures, and this one has it all. This could be a perfect option for someone on a low budget who wants a fun small, easy to use ultra wide lens to complement whatever general purpose. Zoom lens came with their camera, a lightweight lens you can just throw in your bag for holidays or landscape photography. Trips, nice and the fairly bright maximum aperture of f 2.8 makes it easier to shoot with indoors or even for some casual astrophotography lets. Look at the lenses body itself. One obvious place where canon have saved some money in its production is by reusing the body design of their new rf mount nifty 50 lens its plastic, but feels fairly solid and is based on a metal lens mount with no weather ceiling. It weighs only 165 grams. Its a fairly simple lens to handle just like its 50 millimeter stm brother. It has a simple control ring at the front which turns incredibly smoothly and can be switched between changing focus manually or to control other functions such as aperture exposure, compensation or iso levels. The way it works is slightly complex when youre shooting in stills mode with auto focus on then that control ring will only manually adjust your focus if youre half pressing the shutter button at the same time, which feels a little awkward and even then only if youve Turned on lens electronic manual focus in the cameras menu system or you can set your camera to manual focus in the menus and then the control ring will change, focus view whether your shutter button is pressed down or not, but its a bit of a hassle to Keep going into the menus to make the change when used as a focus ring, it works responsively with the focus motor.

As you can see here, the lens does suffer from relatively strong focus, breathing zooming in quite a bit as you focus more closely to your subject that can help you a little if youre, shooting close up to smaller objects, but itll be annoying for some video makers Who want to do big focus pulls, admittedly, not commonly done when shooting with an ultra wide lens, though, as you can see, the lens auto fixes reasonably quickly and accurately, but with a quiet, whining, sound and also the front element, extends and retracts, as it goes Music. If youre shooting video, then, unless you set your camera to focus at the fastest speed setting, then the focus motor will slow down and become virtually silent when youve set the focus ring to work as a control ring then check out your options. In the cameras. Custom function, menu under customized dials and you can set the control ring to change all kinds of things and select whether you want it to do so. Only when the shutter button is half pressed useful on canons newest cameras like the eos, r5 or r6, when shooting video, you can also set your aperture in 1 8 increments, enabling you to change aperture very smoothly for video work. The lens does not feature image stabilization and it doesnt come with a hood, although canon do sell one separately for 35 dollars its front filter size is a small 43 millimeters, its always useful, to be able to attach filters to your ultra wide angle lens, and i Didnt find any problems with vignetting when using my favorite merumi fit and slim 43 millimeter circular polarizing filter.

All in all, considering that this is one of canons, lowest budget lenses, its build quality is perfectly acceptable. It works fine. Although video makers should slow down their auto figures where possible and be ready to tolerate some focus, breathing all right image, quality, im testing the lens here on a canon eos r5, with its full frame sensor in camera, corrections are turned on at f 2.8 in the Middle of your image, we see excellent picture quality plenty of sharpness and contrast, unfortunately, its a different story in the image corners which look hazy at f, 2.8 and fairly soft stop down to f4 and contrast improves in the corners, but not really sharpness at f. 5.6 purple fringing on contrasting edges is reduced and the lens stays this sharp until you stop down to f11, where a little softness begins to creep in due to the effect of diffraction, f16 and f22 get really soft. So its a simple conclusion here: the lenses images look excellent in the middle of your pictures and noticeably weak in the corners, although they do improve little. If you stop down to f 5.6 thats, not what you hope to see on an ultra wide angle lens where corner image quality is important, but with this lenses, small size and low price youve got to expect compromises somewhere. Now lets look at distortion and vignetting. Worryingly. Canon doesnt allow you to turn distortion correction off here, which is never a good sign.

So here are some results for you, wow on the left. You can see uncorrected war images that distortion is encroaching on fisheye lens territory. Here on the right, you can see a jpeg image where only the distortion is corrected, not the vignetting and it looks like the distortion has been slightly over compensated for actually as its flipped into mild pincushion distortion. There also vignetting without corrections, is very strong at f 2.8, as you would expect, stop down to f4 and the image corners look a bit brighter, but vignetting is still visible and it doesnt go away any more than this as you stop down further. What crazy results? The lens is clearly relying on your camera, correcting the living daylights out of your images so obviously leave those corrections switched on now lets see about close up image quality. The lens can focus down to an impressive 13 centimeters, fantastic for shooting smaller subjects straight from f 2.8 close up image. Quality is very sharp and stop down to f4 for it to become excellent. Now lets see how this lens works against bright lights. Its a round of applause here, bright lights, never cause anything other than some very faint, and rather small drops of flowering thats important on an ultra wide angle lens, as the sun has a habit of making its way into your landscape shots and while were shooting in A dark lets look at coma levels. If you look carefully at this small light in the corner, you can see a touch of coma, smoothing but stop down to f4 and it quickly goes away and lets.

Take a look at sunstars while were here. They only really begin to emerge once youve stopped down to f16, although at f22 they look quite nice and strong when shooting with the aperture open and close to your subject its quite possible to get somewhat out of focus backgrounds with this lens. The good news is that this lenss bokeh is pretty pleasing to look at nothing offensive going on here at all and finally related to bokeh lets. Take a look at this lenses. Longitudinal chromatic aberration well at f, 2.8. Its virtually nothing to worry about at all, as just about nothing stop down to f4 and any hints of color on autofocus highlights are totally gone. So the canon rf 16 millimeter, f 2.8, is a little mixed up. Optically speaking its corner image, quality is disappointing, possibly due to those corners being stretched so much by your camera to make up for its wild barrel distortion. But if youre not looking for critically sharp corner image quality, then youll actually find this thing pretty delightful. Its always sharp in the middle of your images, with very good contrast, a very close minimum focus, distance, nice quality, bokeh and decent enough build quality itll be useful for video work too, although watch out for that focus breathing, but for three hundred dollars its a perfect Little lens to keep in your camera bag to complement whatever useful zoomable kit lens, you shoot with its soft corner image.