I remember that two years ago during the 11th National Day holiday, I didn't know where it was poisoned. I took the first camera in my life, the A6000 kite of the Dafu family, and became a pseudo-photographic amateur. I dreamed of it. I can embark on the pinnacle of my life. However, the reality is cruel, because the work is too busy (well, in fact, is in your hands do not know what to shoot), most of the time, the small six are lying alone in the camera bag, the odds of being flopped is really It is pitifully low, not to mention adding new lenses, so it has always been a dog's head. The only good news is that for the past two years, comrades, two years! Little six actually has a price cut! Wood has a price! As a consumer digital product, this is a miracle. . . .
All right, so much so, to order the dry goods, here are some pictures taken with a dog's head (first time sending pictures online, and a little nervous it), everyone pats ha ~
Due to space limitations, he issued a few. In general, the dog's own head is enough for everyday use. The zoom cookie head is easy to carry, comes with anti-shake, and has a good focus. However, as a quest for silk, some of its shortcomings make me more and more unbearable: poor picture quality, small aperture, large distortion at the wide-angle end, etc. Therefore, on another National Day two years later, in order to give a dear birthday to the beloved country, I resolutely decided to enter a large aperture and fix the head, taking into account the people taking pictures!
The selections that roughly meet the above requirements are listed below: Original E50 f1.8, E35 f1.8, FE28 f2, SIGMA S30C f1.4 from the subsidiary.
Let us talk about the E50, the recognized Sony conscience, and the price is not expensive (recently rose by 200). The picture quality is good. The aperture is 1.8. The color is good. It has anti-shake, and the portrait is too narrow. It can only shoot people outside, no. Meet my requirements, pass.
FE28: full head, no anti-shake, equivalent focal length 42mm, good focal length; aperture 2.0, the smallest of the four; distortion is relatively large. In addition, I feel that this head is not always well-coordinated on the 6th, but I don't plan to upgrade the entire site for the time being.
As Libra, I began to struggle with the E35 and S30C. Both focal lengths are similar, the S30C is slightly wider; the aperture is not much different, and the S30C is slightly larger; the E35 comes with anti-shake, and the S30C does not; the E35 dominates the portability, but the S30C is black and long, forcing higher, and the sisters all like it. The S30C is dominant in sharpness; in terms of color, the original E35 dominates; the E35 EOS dominates; in terms of price, the S30C is cheaper.
What should I do if I am swollen? This is where many people are distressed. Of course, local tyrants do not matter, but they are not the same.
In the end, taking into account the likes of the girls and the identity of their sisters, they touched their pockets and the answers came clear. Then they decided to place an order on the 6th and catch the S30C on the final day of the National Day! If you are hesitating between me and me, be sure to consider your own needs, and then choose according to the comparison of the above two!
Second, out of the boxShunfeng is to force, the first day of the order, the next day to hand, the following is an open box map.
Simple package with a plastic film.
The box did not even have any sealing measures. I do not know if someone else bought this kind of situation. Isn't it something to change casually?
A family portrait, a variety of warranty, instructions, warranty for three years, the invoice will not dry. The instructions suggest that the SONY E bayonet camera should be set for automatic correction. It should be to correct the distortion of the lens and can't help but cast a shadow on it.
The protagonist debuted, and compared with the left side of the head is much larger, metal material, surface matte texture, feels good touch. The weight of 265g is not heavy, but it weighs a lot more than the weight of the head 116g.
The eyes are bright, the coating is covered with a light green layer, the filter diameter is 52mm, MADE IN JAPAN, and the workmanship is guaranteed.
The closest focusing distance is 30mm. A silvery C mark on the right indicates the identity of its C series, not Art. Focus ring is wide, easy to operate, damping than the sleeve head, feel oily.
The combined photographs of the Xiaoliu and the Xiaoliu are still relatively coordinated. The hood can be installed in reverse. Many people vomit that the hood is ugly and I feel ok. . .
Third, the use of evaluationFirst of all, let's take a look at the basic overview of the S30C lens: SIGMA 30mm F1.4 DC DN Contemporary is a fixed-focus lens designed by Sigma for microsingle. The lens adopts 7 groups of 9 structures and the maximum aperture is F1.4. The filter size is 52mm and the magnification ratio is 1.7. It uses double-sided aspherical lenses and a variety of special materials. The equivalent 135 full-frame viewing angle focal length is 45mm, and it can be counted as a standard fixed-focus lens.
3.1 MTF curve
The following figure shows the MTF curve of the maximum aperture of the S30C lens. Little White does not understand it, but seeing the keyboard men often use mutual tearing, they check the relevant information on the Internet for everyone to learn.
Horizontal axis: indicates the distance from the imaging center.
Vertical axis: The MTF value is a ratio ranging from 0-1.
Red line: The closer the contrast line is to the solid line and the dotted line, the higher the contrast of the captured image of the lens. At the same time, the flatter curve means that the contrast between the imaging center and the edge is more consistent.
Green line: The closer the solid line and the dotted line are to the contrast value 1, the higher the resolution of the shot image. At the same time, the more straight the curve, the more consistent the imaging center and edge resolution.
Solid line: Indicates the contrast change in the ray direction of the imaging center to the corner.
Dotted line: Indicates that the imaging center is concentric with a change in contrast in the direction of diffusion around.
"Wave Optics MTF" is more faithful to the actual shooting performance, and "Geometric Optics MTF" is slightly higher than the actual shooting performance.
In simple terms, the higher the curve the better, the flatter the curve the better, and the closer the virtual line is, the better. MTF curve is one of the important indexes to evaluate lens performance. It does reflect the performance of a lens objectively to some extent. However, the MTF curve is not the only standard to evaluate the merits of the lens . It is for reference only.
Only from the above MTF curve, S30C at the maximum aperture, the picture quality is not good, basically at a good level, the center of good quality, edge quality away from the center of the location has a significant drop.
3.2 Virtual effects measured
For a small white, the biggest attraction of a large aperture lens is its ambiguity, otherwise I would buy the S30 f 2.8 that came out before Sigma. The compact size is still the Art series, and the key price is cheap. Half of the time, sharp thief is high, if you do not have too much demand on the friend can think about it.
Closer to home, because you just got the camera, you haven’t got time to go out and you just took a few shots for your reference. I really hope that the great motherland will have another lunar birthday! ! !
The above photos are taken at night, with the maximum aperture of F1.4, you can see at this time the depth of field is very shallow, virtual effect is satisfactory, for the only use of the head of this, I feel too satisfied. . .
Now take a look at the comparison of the effects under different aperture values. It can be seen that under different apertures, the blur effect is still significantly different.
3.3 lens distortion measured
Before I bought it, I heard that the S30C had a noticeable shortcoming: it was a relatively large distortion of the lens, and it was necessary to set up automatic correction in the camera. For this reason, Benjamin took the following contrast shots and took a closer look.
It can be seen that when there is no automatic correction of the shot, the picture does have obvious barrel distortion, and those with obsessive-compulsive disorder must not suffer. However, when the on-camera lens is automatically rectified, there is a clear improvement in barrel distortion, but a closer look will not completely eliminate the effect.
Fourth, summary 1, Appearance: black and thick, not small enough; more harmonious with the A6000; overall feeling low-key is not amazing, individuals still prefer;
2, workmanship: metal materials, copper contacts, matte texture, MADE IN JAPAN, overall workmanship is relatively satisfactory;
3, performance: F1.4 large aperture, blur effect is good; focus quickly; standard focal length, into the attack, withdrawal can be kept; barrel distortion; straight out of color in general, can be resolved through the late.
4, the price is relatively cheaper than the E35, can be described as cost-effective choice.
In general, the S30C F1.4 lens is still a good choice as the first fixed focus lens for photography.