Evaluation of small ternary wide-angle Canon 16-35mmF4 with IS anti-shake.

The evaluation of IT 168 canon EF 16-35mm F4L is USM. Before it came out, we always regarded17-40mm4 as a small ternary wide-angle lens, and now it is finally a combination of small ternary lenses. It took Canon so many years to make up a small ternary combination. No one knows whether to squeeze toothpaste or practice internal strength slowly, and develop things to the best before facing users. No matter what Canon thinks, EF 16-35mm F4L can be used anyway. Compared with the big ternary wide-angle Canon EF 16-35mm f/2.8L II USM, it has IS anti-shake function and is cheaper. The two functions of IS and USM will be a key direction of Canon lens update in the future. For lens EF 16-35mm F4L, it is USM. Today, we mainly evaluate the optical performance, not the anti-shake function.

Canon EF 16-35mm F4L is the main parameter of USM. It adopts 12 group 16 optical structure, including three Gmo large-aperture glass molded aspherical lenses and two UD lenses. 9-blade aperture assembly, the nearest focus distance is 0.28m, and the newly added IS anti-shake system can provide anti-shake compensation of about 4 levels. Combining Canon 24-70mm F4 and Canon 70-200mm4, it is a small ternary, which is a wide-angle zoom lens.

Evaluation conclusion: It's a pity that the exterior design is made of non-metal materials, but it's gratifying to adopt internal zoom. In the resolution test, it is obvious that the edge image quality has been improved through a lot of homework. Compared with some previous shots, it has changed the state that the edge image quality is quite different from the center image quality. Relatively speaking, its glare/ghost control is general, and from a personal point of view, it needs to be improved. After joining IS, this lens also makes hand-held shooting more convenient. Under some poor light conditions, even if ISO is not turned on directly, it can be used urgently through IS anti-shake function. Generally speaking, the most outstanding performance of thIS lens is the improvement of edge image quality and the addition of IS anti-shake function, which may be a normal state of Canon's new lens in the future. Overall test, worthy of the red circle, worthy of the positioning of the small three yuan.

Purchase opinion: From the positioning point of view, it complements Canon's "Little Ternary" wide-angle zoom lens, and is one of the most cost-effective lens combinations in Quan Huafu Entry SLR. Canon EF16-35mm F4L ISUM quoted 6699 yuan in JD.COM, which is about 3300 yuan cheaper than16-35mm F2.8. Judging from this price difference, the small three yuan is still worth buying. However, compared with the previous17-40mf4 (RMB 4999). Although the price is much higher, the author still thinks that the genuine "Little Sanyuan" member-16-35mm F4l will be more worthy of recommendation. After all, the edge image quality will be particularly important for wide-angle lens shooting, and 16-35mm F4L has improved a lot in edge, and added IS, which makes handheld shooting benefit a lot and can appropriately reduce the travel burden.

Canon EF 16-35mm F4L is USM appearance.

Canon EF 16-35mm F4L IS USM is similar to 24-70mm2.8II in overall appearance, but the logo on the lens is really confusing from a distance.

▲ Overall appearance

The overall material is not all-metal mirror body, but for portability. It is a plastic mixed metal mirror body and weighs about 6 15g. Personally, I think this weight is very suitable for portable Quan Huafu EOS 6D, with a total of 745g. This weighs about two cans of Coca-Cola.

▲ rubber ring

The zoom ring and focus ring on the mirror body are rubber products, which have anti-slip and dripping effects when used. Its zoom ring is very close to the lens bayonet, so people with big hands may feel a little uncomfortable to use it, while my palm is moderate without any discomfort, and its damping feeling is abrupt and orderly.

▲ Metal bayonet

Although the mirror body is made of non-all-metal material, the interface can be all-metal, which can prevent the interface from being worn due to frequent lens change.

▲ Adjusting switch

There are two adjustment switches: one is AF/MF, and the other is anti-shake off/on switch. IS anti-shake function can achieve the maximum equivalent of improving shutter speed by about 4 levels, and the application of IS in wide-angle zoom lens is the first case.

Canon EF 16-35mm F4L IS USM adopts internal zoom mode, so the length of the mirror body will not change due to zoom, and it can also get waterproof and dripping effect.

▲ Filter aperture and coating of the first lens

The aperture of Canon EF 16-35mm F4L IS USM lens is 77mm, which is the same as the aperture of 24-70mm4/24- 104mm F4L lens in ordinary focal length. In other words, you use a 77mm filter, which is universal. The price of 77mm filter ranges from 200 yuan to 1000 yuan.

The first lens of Canon EF16-35mm F4L ISUM is designed with anti-fouling fluorine coating, which allows us to simply remove dirt and quickly erase fingerprints or water dust.

Wide-angle resolution test of Canon 16-35mm F4

In order to bring clearer and sharper imaging effect to users, Canon EF 16-35mm f/4Lisum lens is designed completely. In the 12 group of 16 lenses, as many as three glass molded (GMo) aspherical lenses and two ultra-low dispersion (UD) lenses are used. Among them, two glass molded (GMo) aspherical lenses are located at the front end of the lens, which can effectively correct the curvature of the image surface and significantly improve the imaging quality of the edge of the wide-angle zoom lens.

The poor edge resolution of wide-angle lens has always been a pain for landscape photographers, so it is urgent to improve the edge image quality of wide-angle lens. I was also paying attention to this aspect when I got this lens. I went out and took a picture myself first to see how the edge quality was. Next, I cut off the center and the edge 100% respectively to see its sharpness.

From the screenshot, the edge details of F5.6 at 16mm are well preserved, which can be said to be valuable in wide-angle zoom lens, comparable to the central screenshot, indicating that Canon has indeed improved the edge image quality of the lens. Then go to the evaluation room to verify it.

Let's test this lens in the standard evaluation room of IT 168. In this resolution test, Canon EOS 5D Mark III fuselage and Canon EF 16-35mm F4L IS USM were used to shoot the ISO 12233 resolution card, and the final data was obtained by using IMATEST software. Let's look at its resolution.

▲ Wide-angle center resolution appears on F4 and F5.6

▲ The best resolution of wide-angle edge appears on F8.

According to the test results, Canon EF 16-35mm F4L IS USM can be regarded as carrying forward the consistent style of its brand, and the resolution of both the center and the edge is very balanced under all apertures, and it is kept above 2000 lines. This test data is very objective. As long as the test data exceeds 2500 and reaches 3000 lines, it is very good. Try not to use the limit aperture F22 when shooting with this lens. You can choose other apertures by yourself.

Comprehensive evaluation shows that the best resolution of wide-angle end is F5.6. Even so, F4 performs very well under the maximum aperture, so it can shoot vigorously under the large aperture, which can make the night scene shoot vigorously. Of course, F2.8 with a larger aperture would be better, but the price is there.

Resolution test of Canon 16-35mm F4 telephoto end.

▲ The best resolution appears on F5.6, and the test results are balanced.

▲ The best resolution appears on F8, and the aperture data of each file has little difference.

Judging from the test results of wide-angle resolution, the best resolution still appears on F8, but it is relatively stable under other apertures, and there is not much fluctuation, indicating that the resolution of this lens has indeed improved. However, it is still not recommended to use an extreme aperture such as F22.

In the past, the resolution of the telephoto end of the test lens generally decreased, but from the point of view that Canon EF 16-35mm F4L is USM, this common phenomenon is not prominent, and it can be kept in a horizontal line with the resolution of the wide-angle end. Therefore, this lens is not bad even if it is used to shoot humanistic themes, and strong detail expression is a good quality.

The resolution of the 35mm end was also tested in the evaluation room in one breath, and then we continued to borrow the real shot from the evaluation room to see the resolution performance of this lens at the center and edge. Judging from the above test data, the edge resolution still shows the quality of its red circle.

▲35mm resolution real shot

According to the actual investigation, the edge of Canon16-35mm F4L ISUM is indeed lower than the wide-angle edge, but it is acceptable on the whole. In my opinion, it is not possible to make a shot perfect for thousands of dollars. The resolution of 35mm end is one of its "relative weaknesses".

Test summary: After Canon 16-35mm F4 strives to improve the edge quality, it can be said that the overall picture taken by Canon16-35mm F4 will be more balanced, and there will be no situation where the center quality and the edge quality stand at two extremes like some shots. From this perspective, Canon 16-35mm F4L can be said to be a lens with a good conscience.

Canon 16-35mm F4 Anti-shake Test

Except for the edge image quality in the last resolution test, I pay attention to it. It is also very important, that is, what is the effect after anti-shake is added? Canon EF 16-35mm f/4L IS USM has added the function of IS image stabilizer, which can achieve the compensation effect of four-stage shutter speed equivalent to 1. Especially for people who have requirements for hand-held shooting and follow-up, having IS anti-shake function can save a lot of worry.

In any case, the addition of IS image stabilizer function will be of great help to the field of landscape photography often handled by wide-angle zoom lenses, or to the shooting of dim scenes such as indoors. In addition, under some special shooting conditions, such as not using a tripod or prohibiting flash shooting, photographers don't have to worry about the impact of the shutter speed reduction on the shooting success rate.

What help can the specific IS anti-shake function bring us? Let's take a look through real shots. This is my hand-held shooting test with the shutter priority gradually reduced from 1/20s (because it is hand-held shooting, the position accuracy does not correspond very well).

Because we only need to test the anti-shake performance of the wide-angle end of 16mm, we can know how the overall IS anti-shake performance is, so let's start directly with its theoretical safety shutter. Judging from the test results, the effect of IS anti-shake is too obvious when shooting manually. This is especially important in the case of insufficient light. At this time, there is no need to force ISO to improve the clarity of the picture. Hand-held shooting has anti-shake function, so you can shoot with confidence.

Test summary: There is only one sentence, that is, the anti-shake function is not aimless, and hand-held shooting is very important.

Canon 16-35mm F4 Dark Angle Test

The loss of light in the four corners of the photo is a dark corner. For many photographers, some people like dark corners, while others don't. When it comes to this issue, different people have different opinions. For a lens, no dark corner is king, especially for a wide-angle lens. Many people don't want to have dark corners. Here, I can only tell you through tests that the dark corner of Canon 16-35mm F4 will disappear under the aperture. Knowing this, you can control whether the aperture is needed or not.

▲ This photo was taken under F4 aperture, and its dark corner can be clearly seen. The light at the four corners is not uniform with the overall light.

16mm dark angle test

According to the test, the dark angle of 16mm disappears completely under F8, which is very obvious under F4 and can be basically ignored under F5.6. Combined with the previous resolution test, it is suggested to shoot some large films between F5.6 and F 16.

35mm dark angle test

At 35mm, the dark angle will not be so obvious, even at F4, the light distribution will be more suitable, and at F5.6, the dark angle will disappear.

Test summary: Because the dark corner is inevitable in the lens, it is good to know at what aperture it disappears. In some environments where you think dark corners look good, turn on F4, and turn on F8 when it is not needed, so there will be no dark corners properly, which is suitable for the full focal length of this lens.

Canon 16-35mm F4 Distortion Test

Many people will say that when taking pictures, try to be horizontal and vertical, so it will look more comfortable. But the distortion of the lens, especially the distortion of the wide-angle zoom lens, is really difficult to control. However, it is also because of its barrel distortion that some photographers like it. Use its distortion to take some photos of beautiful women with long legs and some photos with strong visual impact.

16mm distortion control

▲ 16mm actual shooting has obvious barrel distortion, which will be more obvious if I shoot farther.

In fact, you can probably feel the distortion at the wide-angle end of Canon 16-35mm F4L in the real shot, which is actually very obvious. The test results in the evaluation room also confirmed the feeling in actual shooting, and the data was -4.7 1%, which was seriously distorted.

35mm distortion control

▲35mm real shot

The distortion of the 35mm telephoto end is well controlled, and the actual shooting is not obvious, and the test performance of the evaluation room is also verified accordingly. The data of pincushion distortion is 0.88% (significantly greater than 1%).

Test summary: I have to say that the barrel distortion of 16mm is really obvious, but if you can control it yourself, it is still very impressive to take very creative photos.

Canon 16-35mm F4 Glare and Ghost Test

Glare and ghost usually appear when taking backlight photos. Glare is happy and worrying. If the lens is anti-glare, the photo can retain more backlight details. Another way to control glare is to make it look good. After using Canon 16-35mm F4L, the author thinks that its glare control and ghost control are at a medium level.

▲ This is the actual glare/ghost photo. It is easy to see in the picture that a small purple light under the branch is a ghost.

▲ Ghosts were also seen in the test of the evaluation room, and the glare was beautifully controlled under the strong light simulated by the evaluation room.

Test summary: I think if the glare is not well controlled, at least make it look good. However, after many attempts to shoot in reverse light, Canon 16-35mm F4L can only reach the medium level of SLR lens under strong light and ghost.

Canon 16-35mm F4 Jiao Wai test.

From the actual shooting proofs, the Jiao Wai performance of 16mm and 35mm lenses is not soft, which belongs to the general background blur effect. This is related to its lack of large aperture and focal length. This is not the advantage of wide-angle zoom lens, at least not the advantage of this small ternary lens.

Canon 16-35mm F4 real shot proofs