Discover hd mc 25mm f 1.8 đánh giá năm 2024
Sorry, we just need to make sure you're not a robot. For best results, please make sure your browser is accepting cookies. Show Type the characters you see in this image:Try different image Conditions of Use Privacy Policy © 1996-2014, Amazon.com, Inc. or its affiliates The "7artisans" 25mm f/1.8 is a APS-C wide-angel lens for MFT, Fuji-X and Sony E-Mount. Behind the sales name "7artisans" is hidden the Shenzhen Qigongjiang Photoelectric Technology Co. Ltd. based in Shenzhen and founded 2001. As of october 31, 2014 the Shenzhen Photoelectric Technology Co. Ltd. operates as a subsidiary of China Aviation Optical-Electrical Technology Co. Ltd.. Shenzhen is the fastest-growing Chinese city in the delta of the Pearl River, geographically opposite to Hong Kong. Here, the headquarters of many international companies such as Huawei or Hasee. Foxconn also has a great dependency here. The 25mm lens is offered identically under different brands, such as Zonlai, Discover, Kunro or Hengyijja. The 7artisans 25mm f/1.8 for example look exactly like the Zonlai 25mm f/1.8 with a tiny chrome bezel ring added. The lens feels very good and can be used excellently. The clickless aperture ring is unusual, especially for pure photographers. However, anyone who wants to make videos with his camera will consider the aperture ring as advantageous. However, the best feature of this bright lens is the unrivaled low price. of 69,99 Euro. At such a price, the buyer really does not expect miracles. We will see in the course of this review whether our fears are right or not. Let's start with the static data as always: Optical design: 7 elements in 5 groups Aperture range: f/1.8 - f/16 Diaphragm blades: 12 Construction of the lens body: aluminium body and copper core Minimum focus distance: 0,6 ft. / 0,18 m Weight: 0,31 oz / 143 gr. Filter size: 46 mm Equivalent focal length full frame: 37,5 mm Let's look at what the lens can do. When the aperture is completely open, we find a sweet spot in the center of the image with a sharpness that is surprisingly good. The contrast and the colors are very good, as you can not complain. Stopping down to aperture 2,0 to 2,8 improves the sharpness and optimal it is then from aperture 5.6 to 8.0. The lens shows at open aperture slight vignetting, but not disturbing. Stopping down to f/2.8 will cause the vignetting to disappear. The distortions are very small for a wide-angle lens and only interfere slightly with pure architectural images. Here is an example of a Berlin backyard: Note the slight distortion of the vertical lines. In Lightroom I use the profile correction of the Voigtländer 25mm f/4 color skopar. In the opposite light is this objective very sensitive. There are strong and disturbing flares, the colors fade and the contrast becomes flat. The manufacturer regrettably does not provide a lens hood. The objective itself also has no device to attach a lens hood. So you have only the possibility to screw a lens hood into the 46mm filter thread. Please note that the 7Artisans 1: 1.8 / 25mm HD.MC lens is available in different mounts. This review shows the 7Artisans 1: 1.8 / 25mm HD.MC version for mirrorless cameras Sony E with APS-C sensor (for cropped cameras). At the same time 7Artisans 1: 1.8 / 25mm HD.MC is also available with mounts Fujifilm x, и Micro 4 / 3... Also, please note that 7Artisans 1: 1.8 / 25mm HD.MC is available with both a black case (the version shown in this review) and with silver body. The silver color of the case may be useful to those users who have silver or white / gray cameras. In this review, the 7Artisans 1: 1.8 / 25mm HD.MC lens will be abbreviated as 7Artisans 25 / 1.8. 7Artisans 1: 1.8 / 25mm HD.MC In short7Artisans 25 / 1.8 is a modern manual fast prime lens for cropped mirrorless cameras with an APS-C sensor or smaller. A very popular model, one of the best selling lenses from 7Artisans. The center of the frame is sharp already at F / 1.8. It is interesting for its low price, compact size, all-metal body, 12 aperture blades and a convenient focal length. On cameras with an APS-C sensor, this is a moderately wide angle lens that can serve as a standard solution for everyday shooting. Among the shortcomings, first of all, we can highlight the poor image quality in the corners of the frame and strong vignetting at open apertures. 7Artisans 1: 1.8 / 25mm HD.MC HistoryThe 7Artisans 25 / 1.8 lens was introduced 17 2017 June years and is the very first lens from 7Artisans. In the same year, a little later, lenses were presented 7.5/2.8, 35/2 и 50/1.1. 7Artisans 1: 1.8 / 25mm HD.MC All 7Artisans lenses:For mirrorless cameras with APS-C or Micro 4/3 sensor:
For mirrorless full frame cameras (Full Frame):
For SLR cameras with APS-C sensor:
Cinema lenses [E, L, Z, RF, X, M4/3]:
Drone Lenses:
These lenses are the easiest to find on Aliexpress from the official dealer 7Artisans. 7Artisans 1: 1.8 / 25mm HD.MC Main technical characteristics of 7Artisans 1: 1.8 / 25mm HD.MCReview Instance Name Near the front lens: '7artisans 170323 HD.MC 1: 1.8 / 25mm Ø46mm' ('a'rtisans written with small) 'E-Mount' side. Basic properties
This lens exists with mounts:
Lens hood It must be screwed into the thread of the front filter, is supplied Manufacturer country Made in China (there is no data on the country of manufacture on the lens itself) Period Announced June 17, 2017 Price
Many amateur photographers want a fast fix, especially in addition to their full-time / 'whale' lens. Aperture F / 1.8 two or more steps wider f / 4 aperture, which is used in 'dark' kit lenses at 25 mm focal length. In numerical terms, this means that 7Artisans 25 / 1.8 is approximately 5 times brighterthan, for example, regular Sony 18-55mm f / 3.5-5.6 OSS or Sony 16-50mm f / 3.5-5.6 PZ OSSwhich use a maximum relative aperture of only 25: 1 and 4: 1 at 4.5 mm of focal length. The calculation of the difference in the relative aperture (count the aperture) is performed elementarily: (4 * 4) / (1.8 * 1.8) = 4.94, which is rounded to the value '5'. 7Artisans 1: 1.8 / 25mm HD.MC AssemblyIt's important: 7Artisans 25 / 1.8 is available in black and silvery body color. The review shows a lens with a black housing. Silver color of the body may be useful for those users who have silver or white / gray cameras. The box contains the lens itself with front and back covers, a small instruction and a quality control certificate. In the middle of the box there are very large and soft foam holders. In general, the lens well assembled. 7Artisans 25 / 1.8 has bayonet mount metal and the lens case itself is completely made of metal, anodized aluminum is used. The front lens is deeply recessed into the frame of the case, which creates the effect of an installed hood. Important: lens mount also painted blackwhich makes the design of 7Artisans 25 / 1.8 complete and pleasant enough. Typically, such lenses have a metal mount without painting. The weight of the 7Artisans 25 / 1.8 lens itself is about 140 grams. In the hands, the lens feels like a solid thing. The filter diameter is 46 mm. By itself, the 7Artisans 25 / 1.8 is quite compact, well suited for small Sony cameras with an APS-C sensor. The diaphragm consists of 12 (twelve!) of petals and forms a round hole at any values, while in the photos in the blur zone, rather round discs of blur are obtained. The diaphragm can only be controlled manually using a special ring. The diaphragm ring rotates smoothly, no clicks and fixed values, you can set any intermediate value in the range of F / 1.8-F / 16, which is very useful during movie shooting. It's important: The marks on the aperture ring from F / 2 to F / 16 are not true. When going from F / 2.0 -> 2.8 -> 4 -> 5.6 -> 8 -> 11 (?) -> 16 drop exposure does not occur correctly (not in steps). F / 16 is actually about F / 11. And, for example, the F / 5.6 mark actually corresponds to the real F / 4 value. When rotating the aperture ring from f / 1.8, for example, to f / 2.8 Exposition falls by only 1/3 of a stop (and should fall by 4/3 of a stop). Interestingly: Through the lens, you can see that the aperture blades at F / 1.8 are not fully open (the blades are not fully hidden in the body). Interesting 2: Behind one of the front lenses (or behind the lens group) there is a matte dark red auxiliary diaphragm. Most likely, it artificially limits the inlet to increase optical performance. The entrance pupil diameter with this aperture is about 13-14 mm, which corresponds to a relative aperture of 1: 1.8 at a 25 mm focal length. The light transmittance of the lens is high and is at the T / 2.0 level. 7Artisans 1: 1.8 / 25mm HD.MC FocusingThe focusing ring is narrow, metal, with very fine notched ribs. The ring spins on 90 degrees (1/4 of a full turn). Focusing is smooth and pleasant. There is a slight lag of the focusing ring in the focusing position at infinity. During focusing, the trunk of the lens runs forward but does not spin. During focusing, the entire lens block moves. On the ring there is a scale with a focusing distance in meters and feet and a depth of field scale. The minimum focusing distance is only 18 centimeters and the maximum zoom ratio is approximately 1: 4, which is a good value for close-up shots of small subjects. 7Artisans 25 / 1.8 has a small 'Focus Breathing' effect (changes in viewing angle during focusing). During focusing towards the MDF, the viewing angle decreases. Focus Shift (shift focus, changing the focus distance due to iris) is missing. Important: focus picking with 7Artisans 25 / 1.8 on a Sony Alpha 3500 camera works well. 7Artisans 1: 1.8 / 25mm HD.MC Image qualityThe weakest side of the 7Artisans 25 / 1.8 is the very poor sharpness in the far corners of the frame, which does not bounce back even with a strong aperture. But for most of the frame, the resolution is good or satisfactory. Sharpness
Distortion
Vignetting
Aberration
Rest
Important: at the time of the creation of this review, there was no 7Artisans 25 / 1.8 profile for popular RAW converters. You can create a profile yourself or wait for its release. 7Artisans 1: 1.8 / 25mm HD.MC Sample PhotosAll photos in the review are shown without processing. Camera used Sony α3500 (Sony ILCE-3500) based on EXMOR APS-C CMOS 20 MP sensor. All photos are on-camera JPEG. Functions' Corr. ob .: Shading ',' Corr. about: Chrome. aberr. ' and 'Corr. rev .: Distortion 'have been disabled. Original images in JPEG format can be downloaded as an archive at this link (77 files, 450 MB). Original RAW ('.ARW') images can be download the archive from this link (24 files, 400 MB). 7Artisans 1: 1.8 / 25mm HD.MC My experienceThe 7Artisans 25 / 1.8 lens gained its popularity deservedly. This is a good solution for amateur photographers. The lens has its problems, but the low price, convenient focal length, compact size and quite adequate sharpness in the center of the frame at F / 1.8 do the trick. (Aka ANDOER 25mm 1: 1.8 HD.MC) I liked a little more than 7Artisans 25 / 1.8. 7Artisans 1: 1.8 / 25mm HD.MC All Sony E-mount cameras with APS-C sensor
7Artisans 1: 1.8 / 25mm HD.MC All Sony E lenses for APS-CFix Lenses:
Zoom Lenses:
Third-party autofocus lenses for Sony E APS-C:
Many interesting manual solutions are provided by Chinese manufacturers and brands. 7Artisans, TTartisan, Meike, Neewer, PerGear, Kamlan, Brightin star, Mitakon Zhongyi, Venus laowa, Fujian, ARTRALAB, AstrHori other. Autofocus Speed Boosters are also interesting Viltrox Canon EF -> Sony E 0.71X и Metabones Canon EF -> Sony E 0.71X... List of full-frame cameras and lenses Sony FE (Full Frame E) here 7Artisans 1: 1.8 / 25mm HD.MC Price7Artisans 25 / 1.8 costs around $ 70. The easiest way is to buy 7Artisans 25 / 1.8 from the official seller of 7Artisans on Aliexpress by this link. 7Artisans 1: 1.8 / 25mm HD.MC Results7Artisans 25 / 1.8 is an inexpensive compact lens that can be used as a standard prime lens for every day. Original autofocus lenses , Fujifilm 23/2WR, Panasonic 25 / 1.7 и Olympus 25 / 1.8 MSC are many times more expensive. The image quality of the 7Artisans 25 / 1.8 has some drawbacks, but in general it should suit many amateur photographers. 10 main advantages
10 main disadvantages
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