Which is better for Canon cookie lens?

EF-M 22mm f/2 STM is the fixed-focus lens of EOS M series micro-single digital camera. It is the one with the widest viewing angle and slightly more expensive among the three "biscuits" at present, and the price is about 1699 yuan.

From the technical indicators, the lens is only 23.7mm thick and weighs about 105g, which is very suitable for hanging on the fuselage of EOS M3. After the lens is installed, the front end of the lens is only slightly more prominent than the fuselage, and you can hardly feel the existence of excess weight when shooting with your hands.

EF-M 22mm f/2 STM comes in silver and black, and the silver one is very beautiful and metallic, which is rare in the market. You need to discuss the order with the store. This lens is the only one of the three "cookie heads" whose maximum aperture can reach F2 aperture (one of the reasons for the slightly expensive price). The luminous flux is large, the focusing speed is fast, and the equivalent focal length angle is similar to that of a full-frame 35mm lens. EF-M 22mm f/2 STM has a small front lens, a filter aperture of 43mm, and a small hood (EW-43) like an iron ring. From the actual shooting point of view, it is more convenient for assistants or others to use the sun visor to help block the portrait against the light than to rely on the hood. The bayonet on the back of the lens is made of metal, which is more reassuring than the plastic material used in the EF50mmf/ 1.8 lens with the same price.

The rear bayonet of EF-M 22mm f/2 STM biscuit head is made of metal, which has become the most cost-effective one among EOS M series fixed-focus lenses due to its high imaging quality.

The lens structure of EF-M 22mm f/2 STM is 6 lenses and 7 groups, including 1 aspheric lens. This is especially important for EOS M series cameras without built-in distortion correction function. Its aperture adopts 7 round holes, and the installation direction of blades is forward overlapping design. Its focusing method is very special, and the whole group moves to complete the focusing process. This lens has a certain close-up capability, the nearest focal length is 0.15m, and the magnification is 0.2 1 times, which is stronger than the SLR 35mm lens, which provides convenience for shooting some small objects, and can also shoot street shots and landscape themes.

EF-M 22mm f/2 STM is quite good in definition, sharpness and color reproduction, close to the real color, with clean photos and rich details. It should be noted that the maximum aperture of F2 is not the best imaging aperture, and the best imaging effect can be achieved only by dropping two gears. If it is used to shoot portraits, it is better to blur the foreground than to expect the background to have a good blurring effect, and it is easier to shoot excellent pictures. This lens is conducive to taking full-length portraits, and can be simply PS-processed later. The usage is similar to that of a 50mm lens, and the viewing angle is similar to that of a 35mm lens, serving more subjects. From portraits and group photos to scenery, documentary, street sweeping, entertainment and candid photos, its use far exceeds the standard lens.

Unlike the other two Canon "cookie heads", this micro-single lens is not equipped with a manual/autofocus switch and needs to be set on the body. At the same time, its focus ring is driven by electronic signals, so when the lens is not powered on or on standby, rotating the focus ring will not have any response. In addition, EOS M fuselage startup and lens startup are relatively slow, so you must be in standby state at any time when you want to capture.

EF 40mm mm f/2.8 STM

The EF 40mm f/2.8 STM with a price of 1099 yuan is Canon's first SLR "cookie head" with a large market share. The maximum diameter of the lens is about 68.2mm, the thickness is 22.8mm, and the weight is only 130 g, which is slightly heavier than the "biscuit head" mentioned above, but it also supports full-time manual and silent focusing. EF 40mm f/2.8 STM lens also uses seven circular aperture blades with macro close-up function. Its closest focusing distance is 0.3 meters, and the magnification is about 0. 18 times, which is convenient for shooting close-ups of still life. Different from EF-M 22mm f/2 STM, its mirror body is equipped with AF/MF selector switch, which is very convenient to switch when shooting on site. The filter size of EF 40mm f/2.8 STM is 52mm, which is universal and easy to find lenses with the same filter effect. If you are in a dormant state when you don't shoot for a long time, you need to press the shutter to wake up if you want the lens focus motor to work again. EF 40mm f/2.8 STM's very smooth focusing operation is a pleasure when shooting, and the anti-slip line on the focusing ring has a good touch. EF 40mm f/2.8 STM is not only inferior to the "red circle" lens in imaging quality, but also has AF/MF selector switch on the lens body, which is more convenient for users to operate. EF 40mm f/2.8 STM lens has wide adaptability and can handle full-length portraits, busts, environmental portraits, fashion portraits, tourist portraits and so on. However, when taking a close-up portrait, because it is close to the subject, it will have a certain psychological burden on the subject, so it is necessary to communicate with the subject more before shooting. This lens looks sharper from the full aperture, which is not inferior to the "red circle" zoom lens. When shooting some small scenes or smaller subjects, the photographer needs to press the shutter connection circuit for fine manual focusing. Compared with other tall and thick red circles, this "cookie head" gives people a low-key feeling.

EF-S 24 mm f/2.8 STM

EF-S 24mm f/2.8 STM is a special lens for APS-C model, and the price is about 1299 yuan. The lens is 22.8mm thick and weighs about 125 g. Its hood is ES-52, which is common with EF 40mm f/2.8 STM. The closest focusing distance of EF-S 24mm f/2.8 STM is about 0. 16 m, and the maximum magnification is about 0.27 times. It can shoot the subject at close range, and can cover the whole picture within the object range of the size of a business card. The focal length equivalent to about 38mm can be obtained by converting to 35mm specifications, and the imaging effect is more natural. Its maximum aperture is F2.8, which is suitable for shooting portraits close to the subject, and uses the blurring of the foreground to emphasize the perspective effect of the near big and far small. Judging from the actual shooting effect, the blur degree of the lens is smooth and soft, and the transition between light and dark levels is good, which is suitable for outdoor portraits and wedding dresses. Comparatively speaking, although they are all "biscuit" lenses, the image quality of EF-S 24mm f/2.8 STM is weaker than that of EF-M 22mm f/2 STM, especially when the aperture is fully open, the performance of dark details needs to be improved. At present, the purchase price of this EF-S 24mm f/2.8 STM from the Internet is about 1 100. From the market point of view, this shot belongs to one of the three "cookie heads". The reason is simple: photographers who use APS-C cameras at present often choose 50mm Quan Huafu standard lenses, considering the investment waste caused by upgrading Quan Huafu in the future.