After selling the Contax G45 F2 on the handle to a younger partner, the hand has always lacked a header. The Zeiss55 is good in all aspects, but it is 1.8 points that mean it is so bad. 50 1.4 It is too expensive. . . .
Look directly at a wave of photos on the machine.
This shot was initially seen in a circle of friends with a friend of the photographer who made a few pictures. It was a seven-crafter. 5.1. Then began to understand this lens, was shocked to the aperture value of the 50mm lens is 1, even the price is less than 2k. The same parameter VOLIGTLANDER 501.1 price is close to 5k. This made me very interested.
After looking at the Taobao page, I found that this is a Leica M bayonet lens to support the macular focus and looks pretty good, is the general M mount lens should look like. Provide black silver two colors to choose from. Our next proofs and pictures are this black 5.1.
Let's take a look at the seven craftsmen's careful thinking, why do they come out of the M bayonet instead of the E bayonet? I think the seven artisans probably want to take a heavenly work out of a Leica M bayonet to E bayonet adapter ring ride, this adapter ring is powerful, and supports auto focus, auto focus, auto focus, no wrong. Then he took advantage of this heavenly autofocus ring.
This time the test (playing games) we use Sony A72 with Tiangong's autofocus ring. There is no Leica body, eh. 
-------------------------------------------------- -------------------------------------------------- -------------- No out-of-the-box look. . . .
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There are a variety of things in the box with a paper lens body, a small yellow screwdriver to adjust the focus of a small Leica M lens generally have a small focus handle, you can easily focus.
The lens cap is an all-metal lens cap. The Chinese and English of the seven craftsmen are engraved on the outside, and they are heavy and supportive. Bad font layout.
Lens work surface lens surface is aluminum shell, get the feeling of hand does not have the kind of more delicate feeling of Leica M mirror, its surface particles are rough. However, the whole is still heavy and it feels quite weighty.
The front lens pressure circle has written the 7artisans 50mm F1.1 lens number and the lens filter lens diameter of 55 before the jade can see it is still relatively large, full aperture when its light caliber is also relatively large. The coating on the top of the jade is yellow-green.
The ass of the lens can be seen above the inner mirror core of the lens is composed of copper. There are five grooves above, this lens does not have electronic contacts, these five grooves have no definite role, probably in order to not damage the fuselage's contacts when the original M digital body.
After the aperture was fully opened, this aperture is still quite large and looks very beautiful.
The surface ring above the focus ring also uses the surface groove to increase the friction treatment, but unexpectedly, the feel of this focus ring is still acceptable, not bad. Because I use autofocus most of the time.
The overall feel is good, focus can give 7-point aperture failed, after hanging up is still quite heavy, after all, the quality of 400g +, plus Tiangong AF ring, hang on the A7, is still more test the power of the wrist.
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Let's talk about the most important part of the picture quality. There are no rigorous scientific tests here, only visible imaging differences.
The selling point of this lens is a large aperture of 1.1, so we naturally won't lose the maximum aperture test here. Next we look at the dispersion control performance of the lens, large aperture lens often encounter dispersion control problems, and the presence of purple and green edges will affect our shooting to a certain extent. We use the scenes of everyday applications to reflect the vignetting and dispersion of the lens under different apertures.
At the aperture of F1.1, we can easily see the image of the lens on the camera is relatively fleshy, and when the aperture goes to 1.4, we can see from the camera's screen that the whole image is much more solid. At 2.0, the performance is even better.
But as a large aperture lens, if it is not with a large aperture, then it has what it means. That's it, even this kind of brainless dog, who would prefer to receive 1.4, shows that its usable aperture is really only 1.4.
F1.1
F 1.4
F 2.0
F 4.0
The out-of-focus performance is also an important attribute of a large aperture lens. When the lens is at an aperture of 1.1, the out-of-focus spot is quite large, and the spot at the center is also relatively round. The edge of the caliber erosion is rather strange, the general regular edge is lemon-like (Nikon 58MM 1.4G) or purely round (Sony GM lens). And it's weird half a lemon
There are also a variety of strange light spots appearing, and after using these days I found a variety of light spots.
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This is its out-of-focus spot condition at 1.1 1.4 2.0 4.0
F 1.1
F 1.4
F 2.0
F 4.0
The problem of out-of-focus two-linearity is also a very serious problem. Although its focus is very virtual, it cannot be changed. The second-linear control is an uppercase problem. The official Taobao propaganda of the seven craftsmen even said bluntly, “a very slight two linear� ? ? ? ? Exm????
Because this lens uses 18-page aperture blades, no matter what the aperture, the central spot always shows a regular round shape, which is commendable, as if the domestic lens manufacturer's aperture blade does not have money, both Crazy stacked aperture blades.
In terms of distortion, the control of this head is relatively poor, and we can get a general idea by looking at this map.
The following is a look at some of the proofs shot on this lens over the past two days.
Here are some weddings shot with the 50 1.1 and 85 1.8 lenses. Everyone can look at it.
The lens of the Seventh Craftsman, although 1.4 is available, the price of less than 2k can have a good quality 1.4 header, and if necessary, it can also use 1.1 to save lives. I personally feel that it is still quite cost-effective. However, I personally feel that this lens, vignetting is still more serious, Jiaozuo more strange, what is more strange color, it will not be released, there is no problem in the later period.
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