Today we will consider a lens (fifty dollars) for Sony mirrorless cameras from the manufacturer YONGNUO.
By the way, this is the first and so far the only product for cameras with an APS‑C sensor and Sony E mount.
Instructions in English and Chinese, detailed and understandable.
The weight of the lens is 164 grams.
Although the lens does not feel expensive, it does not cause any complaints about the quality. The body (like the lens hood and both covers) is made of plastic, the build quality is good. The lens hood securely attaches to the lens with a soft click.
A ribbed manual focus ring is installed in the middle, it rotates smoothly and pleasantly, there is no rotation limiter (you can see the autofocus operation in the video review starting from 44 seconds). Switching between manual and auto focus is carried out directly in the camera.
The lens has a Micro-USB port for connecting to a PC and updating the firmware. The firmware can be downloaded here.
The diaphragm consists of seven petals (you can see how it works in the video review, starting at 1:06).
Lens in action
All tests were carried out on a Sony A6300 camera.
A stepper focus motor is installed inside the lens, which provides a good, fairly fast focusing speed both when shooting photos and videos (you can see it in the video review, starting at 1:18). The focus quality is also good, even when shooting a fast-moving subject in continuous shooting, almost all frames are in focus.
It is worth noting that autofocus is very quiet, only if you listen closely you can hear slight motor sounds (especially if the autofocus tracking mode is on and the picture is constantly changing).
As for the quality of the picture that this lens produces, it is decent, the photos are sharp and contrasting, and in any area of the photo and at any aperture.
Aberrations are clearly visible at an open aperture, and there is also a vignette (at 1.8), especially at a large focal length (when shooting at short focusing distances, the vignette is not so noticeable). Already at aperture value of 4.0, there are significantly fewer aberrations.
Sample photos taken at F1.8 (left) and 4.0 (right):
Distortion is practically absent, in any case it is imperceptible.
By the way, distortion and vignette are easy to remove in Adobe Camera RAW (there is a correction profile for this lens), and aberrations can also be significantly reduced. How to do this can be seen in the video review, starting at 3:01.
I compared this lens to a Sony 16–50mm 3.5–5.6 at 50mm. To my surprise, the reviewed lens is significantly better in terms of sharpness. In addition, the Sony lens has strong vignette and a 50mm larger field of view.
Sony on the left, Yongnuo on the right:
F1.8 and 5.6 + photo with Sony lens (5.6):
Summing up, we can safely say that Youngnuo has turned out to be an excellent lens that I strongly recommend for purchase.
+ aperture 1.8;
+ excellent sharpness at any aperture;
+ fast and quiet autofocus;
+ support by the manufacturer;
+ low cost;
— noticeable aberrations at the widest aperture.