Today, I will test and evaluate a lightweight standard zoom lens, Canon RF24-105mm F4-7.1 IS STM. It is an RF mount lens designed specifically for Canon R series mirrorless lenses. This lens is compact and weighs only about 395 grams. Covers the commonly used focal lengths, suitable for shooting macro, portrait, scenery, street shooting and other themes, which is convenient for travel or daily street use. The official website price of this lens is 2999, which is a very cost-effective lens. Overall, it is a choice for home use lenses or for beginners in photography.
Canon RF24-105mm F4-7.1 IS STM is a comparison A versatile lens, one lens can be used for multiple purposes. The focal length range of 24mm-105mm is very wide, applicable to a wide range of subjects. The wide-angle end 24mm F7.1 is a good companion for landscape creation, and 105mm can help photograph distant objects. It is worth mentioning that this lens is equipped with a central macro focusing function. The maximum magnification of 24mm end is about 0.21 times, and the maximum magnification of 105mm end is about 0.4 times, which is conducive to the creation of macro subjects. .
In addition, as far as the price of the lens is concerned, the image quality of the lens at both ends of the focal length is remarkable. The flare and ghosting are also well controlled. There is no problem shooting the light source directly, and it can be recorded. The night scene with staggered lights. Moreover, the anti-shake effect of the lens is satisfactory. In the actual measurement, the lens can achieve up to four levels of anti-shake, and it can provide better stability when shooting in hand. Even in the case of poor light, a slower shutter speed can also shoot a clear picture. Thanks to this design, the night scene shooting performance of this lens is excellent. The figure below is a detailed scoring table.
Combined with the price of this lens, it finally reached 8.3 Score, overall it is worth buying. The camera used in this evaluation is a full-frame micro Canon EOS RP. Let’s follow us to evaluate this lens in detail from the five aspects of lens appearance, resolution test, optical quality test, anti-shake test, and out-of-focus test. Performance.
一. Lens appearance
Canon RF24-105mm F4-7.1 IS STM lens weighs about 395 grams, when used with EOS RP, the total weight is about 880 grams, even if the neck is hung for a long time It will not be too burdensome to wear, and it can ensure a good balance when used with the body. At the same time, as an external zoom lens, the body design is small and exquisite, and the lens is only about 88.8 mm when it is extended to the longest.
In terms of design, this lens has a simple and bold design, and the front-end It is the focus/control ring, and the center is the zoom ring, which rotates smoothly and feels smooth. There are two buttons on the lens, namely the IS image stabilizer switch and the focus/control ring switch. There is no traditional AF/MF switch.
The zoom ring in the center of the lens feels good to use and rotates smoothly. It is also very convenient and smooth when launching the lens.
The focus/control switch of the lens is used to control the lens The front focus/control ring, this switch can select whether the focus/control ring is “focus ring” or “control ring”. In the focus ring mode, you can not only adjust the focus, but also set the manual focus, whether the turning of the focus ring changes with the rotation speed or is linked with the rotation angle.
FOCUS/CONTROL The switch is used to define whether the front end is “focus ring” or “control ring”
In the “control ring” mode, users can customize their functions in the menu, such as aperture, shutter speed, ISO sensitivity Almost all common functions in shooting are included. In this evaluation, it is defined as ISO sensitivity adjustment. The accuracy and sensitivity during rotation are excellent, which greatly simplifies the operation of key adjustment parameters. In addition, its rotation direction can also be controlled, and the “reverse direction” can be selected. This design takes care of each user’s usage habits.
The control ring adopts a diamond-shaped anti-skid design when rotating, and there is no action sound. When shooting a video, the “control ring” can be set to adjust the aperture, and there is no sound when rotating.
On the fuselage button, in addition to determining the “focus ring” or ” The focus/control ring switch of the “control ring” is also equipped with an IS image stabilizer switch. This lens is equipped with optical anti-shake. This evaluation found that the anti-shake effect is still very good. Turning on this button can greatly improve the stability of handheld shooting.
Second, resolution test
First , Let’s measure the picture quality performance, this part uses JPG format pictures. In order to test the difference in resolution when the aperture changes, we controlled other variables, for example, the sensitivity was locked at ISO 100. Then use the manual mode to keep the exposure consistent. The 24mm end aperture is gradually reduced from F4 to F22, and the 105mm end aperture is reduced from F7.1 to F22. We intercepted the center and edges of the picture, let’s take a look at the picture quality performance of the lens at the 24mm end.
as one An entry-level zoom lens suitable for ordinary photography enthusiasts. Such image quality performance is still a bit beyond our expectations. From the point of view of the central image quality, when the aperture is fully opened, the picture details are still intact. When the aperture is reduced to F5.6, the image quality has been significantly improved, and the image quality is at its best at F8. At the aperture of F22, the picture quality did not show a significant decline, and maintained at a relatively average level. On the whole, the image quality of this lens is still in line with its price positioning. There is still a certain gap in sharpness compared with high-end lenses, but it is also sufficient for daily home or ordinary users.
From the edge image quality point of view, this lens performs well. As the aperture shrinks, the image quality is relatively stable. When the aperture is contracted to 22, the image quality is slightly affected. The sharpness is best when the aperture is fully open. When shooting scenery with the 24mm end of this lens, you can use F8 and F11 apertures.
Next, let’s take a look at the center and edge image quality of this lens at the 105mm end.
At the telephoto end, the center image quality is slightly lower than the wide-angle end There are different. When the aperture is fully opened, F7.1 has the best sharpness. As the aperture shrinks, the center image quality gradually decreases. The performance of the edge image quality is similar, with the most complete picture details preserved in F7.1. When you need to capture the scenery in the distance, you can use the 105mm end to shoot, with F8 common aperture, the sharpness of the picture will not be affected.
Focal length 105mm, F7.1, 1/200S, ISO 100
From the point of view of image quality, this lens is suitable for ordinary photography enthusiasts, and it is very suitable for daily recording. If you have higher requirements for picture details , You can choose a more professional lens. The edge image quality and center image quality of this lens are maintained at a stable and average level. The image quality is best when the aperture is F8, and when the aperture is reduced to F22, the image quality is slightly lowered at both the 24mm end and the 105mm end, which is enough Regular use. This lens is suitable for beginners, with RP, the price of the kit is about 10,000, and the price is still very suitable.
3. Optical quality test
As such a relatively comprehensive lens, we still have a lot of expectations for its optical quality. Next, let’s take a look at the dispersion, anti-glare, vignetting and distortion performance at both ends of this lens, starting with dispersion.
At the 24mm end, the dispersion performance is still relatively good. When the aperture F4.0 is fully opened, the purple fringing is basically no longer visible. Therefore, when shooting objects in direct sunlight with the 24mm end, there is basically no need to worry about purple fringing on the edges of the objects. Let’s take a look at the 105mm end.
The dispersion performance at the telephoto end is slightly inferior to the regular focal length. As the aperture shrinks, the dispersion improves. Next, let’s take a more intuitive look at the anti-glare performance of this lens, and its performance when shooting strong light sources directly with it.
As can be seen from the test chart, the glare of this lens The control is good, and the anti-glare performance of the 105mm end is slightly stronger than that of the 24mm end. When the focal length is 105mm, when the aperture is reduced to F22, the effect of starburst can also be taken. Using the medium and long focal length, this lens can excellently record scenes with interlaced lights.
Let’s take a look at its vignetting performance. At the wide-angle end, its vignetting performance is still very good. When the aperture is fully opened, the vignetting is not serious. When it is contracted to F5.0, the vignetting has basically disappeared.
at the 105mm end, there is a slight dark corner when the aperture is fully opened, When it shrinks to F8, the vignetting has basically disappeared. When shooting with this lens, no matter whether it is the 24mm end or the 105mm end, there is no need to worry about the performance of vignetting.
The distortion of the lens, there is a slight pincushion distortion at 24mm , There is a significant improvement in the 105mm end.
24mm distortion situation
105mm end distortion situation
Fourth, anti-shake test
This lens is equipped with optical image stabilization, and uses an optimized algorithm, the stability is significantly improved in the handheld situation. After our evaluation, 24mm end, hand-held shooting, when the shutter speed reaches 1/6s, there is about a 50% success rate to shoot stable and clear pictures. At the 105mm end, a demarcation point appears when the shutter speed is 1/13s, and the picture starts to be slightly blurred.
After testing, this lens can achieve about three and a half gears, The four-speed anti-shake effect is quite satisfactory. When shooting at night, you can also lower the shutter appropriately to ensure the amount of light, which can prevent the unsatisfactory picture quality due to the high sensitivity. However, the anti-shake test results will be affected by the tester’s holding posture, psychological quality, and professional skills. The actual shooting effect may vary slightly between individuals. We recommend that in actual shooting, the wide-angle end shutter can be controlled within 1/6s, and the 105mm end shutter can be controlled within 1/13s. If necessary, use it with a tripod.
5. Focusing test
Regarding the focusing performance of this lens, we mainly test it from three aspects: the closest focusing distance, out-of-focus performance, and focusing speed.
First of all, this camera is equipped with a central macro focus function, which is very suitable for shooting macro. The closest focusing distance is about 0.2 meters at the 24mm end, and the maximum magnification is about 0.21 times. The 105mm end is about 0.34 meters, and the maximum magnification is about 0.4 times. It can also focus well when it is very close to the object. Combining with a large aperture, it is suitable for taking close-up close-ups of objects with rich details such as flowers, plants, and food. In our real shots, this lens has outstanding close-up performance, accurate focus, good background blur, and can show rich details of objects.
The out-of-focus test of this lens at the 24mm end and 105mm end, as the aperture changes, the 24mm end test animation is as follows:
When the aperture is fully opened at F4.0, the picture taken is as follows:
From the test results, it can be seen that when the aperture is fully opened at F4.0, the background halo is rounded and the edge transition is relatively natural. Let’s take a look at the out-of-focus performance of the 105mm lens.
The shooting effect when the aperture is fully opened at F7.1 at 105mm Picture:
At the 105mm end, the background blur performance is slightly stronger . When the aperture is F7.1, the depth of field effect achieves the purpose of highlighting the subject, and the spot shape is also more natural. From this point of view, this lens can also be used to shoot night portraits, the shape of the spot behind the person is rounded, and the use of a large aperture can better bring out the person.
In addition to its close-up and focus state, this lens uses an STM stepping motor with a lead screw unit to improve the speed and accuracy of autofocus. We recorded this lens at 24mm end And the live focus of the 105mm end. Among them, the 105mm end test video is as follows:
As can be seen from the video, the focus performance at the telephoto end is already good. Based on the excellent focusing system of this lens, this lens can bring convenience to the shooting process when shooting multi-object scenes or dynamic objects. Tap the screen to use the touch screen to focus, which increases the accuracy of focus. The speed is also very smooth when switching between different focus objects.
6. Summary and samples
Generally speaking, this is a lens with rich focal length and high cost performance, suitable for ordinary photography enthusiasts. The sharpness of the center and edge image quality is good, and the image quality is the best at the 24mm end and 105mm end at aperture F8. Secondly, thanks to the anti-shake technology of the lens, the highest four-speed anti-shake effect can be achieved, and the stability can also be maintained at a slow shutter speed, so this lens performs well in night shooting. The focusing performance of the lens is also excellent. The shortest focusing distance at the wide-angle end is about 0.2 meters, and the telephoto end is about 0.34 meters. It is very suitable for shooting macro and recording every minute detail of life. Moreover, the accuracy and speed of focusing are good, and it is convenient to quickly switch the subject when shooting multi-object scenes.
is recommended for family purchase. You can take pictures of food, pets, cute babies, and it is also suitable for recording day and night scenery when traveling. The effect of shooting night portraits is also good. Macro is also very suitable for taking product photos, and it is also a good choice for commercial use.
Real shot samples:
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