Can a novice photographer buy a SLR?

Lead: Many novices will ask how to buy a SLR. What lens do you use? Lao Lang will recommend condoms first, but many people think that standard condoms are too cheap. However, when the budget is tight and the photography threshold is just touched, it is the best policy to use condoms with peace of mind, at least without cheating. Maybe you really don't understand condoms.

The evolution of condoms, manufacturers are also very hard.

From the launch of each new generation of SLR products, the first contact of Lao Lang is the set of machines. Judging from the use of each generation of new digital cameras, in fact, manufacturers have also spent a lot of thought. Take Canon as an example. It is estimated that many people don't know the history of 18-55mm. During 2003-20 15, Canon introduced 6 sets of 18-55mm sets of machines in China.

The first generation of condoms is more like a blank sheet of paper. It would be nice to be able to describe it. Will be more appropriate, and then slowly add aspherical lens to improve aberration, add anti-shake system to improve picture stability, optimize lens coating to reduce ghost and glare. Especially from the fifth generation to the sixth generation, the newly designed optical system is adopted, and the maximum magnification is increased from 0.34 times to 0.36 times, which is the highest specification of EF-S lens except macro lens. STM focusing motor is adopted to improve the focusing speed and eliminate the focusing noise, which makes the auto-focusing function more practical in video shooting, and supports full-time manual focusing for the first time. Built-in focusing design, the front lens does not rotate when focusing.

Since Nikon 18-55mm was released with D50 in 2005, the focal length has been continuously upgraded. The second generation has built-in ultrasonic motor and ED lens, and the third generation has added VR optical image stabilization. The fourth generation adopts telescopic design, which has obvious slimming effect and reduced weight by 26%, catering to the development of SLR lightweight.

This year, it has been upgraded to the fifth generation, and the focus drive is changed to a stepping motor, which is quieter and faster, and will not be disturbed by focus noise when recording video. The upgrade is more obvious for the big head, from 18-70mm to 18- 105mm, and then to 18- 140mm, which is a compromise of optical structure, image quality, distortion, weight, volume and production cost.

Why are big machines more worth entering?

Reason 1: covering the most commonly used focal segment.

Before reaching this conclusion, Lao Lang made a special analysis of hundreds of thousands of photos taken in these years with software and got this result. The results show that about 75% of them were shot at the focal length of 28- 120mm, 6% at the focal length of 120-300mm and only 19% at the focal length of 10-. This set of data shows that the frequency of medium focal length shooting is much higher than that of wide angle shooting. With the more thorough understanding of photography, the lens with medium focal length is the main force. When shooting scenery and encountering unexpected situations, you will have more opportunities to easily capture wonderful pictures than others.

Reason 2: Do not repeat investment.

Before writing this article, Lao Lang made a statistic. Users who buy a 18-55mm small kit will generally upgrade their lenses within one year. Because they feel overwhelmed, many Canon users will choose 24- 105mm f/4L, and some Nikon users will consider 18-200mm. Do you want to keep it? Take a picture and set the stage. Users who buy 18- 135mm large sets of machines give priority to fixed-focus lenses, mainly focusing on 50mm, 85mm and 100mm focal lengths, and begin to pursue image quality and function, which is another level.

Reason 3: Image quality.

I don't know when it started. There is a saying that Canon 18-55 mm f/3.5-5.6 ISTM was blown to the same level as 17-40mm f/4L USM. It seems that after the aperture is closed, you can transform. If that's the case, I'm afraid the second-hand market 18-55mm lens has long been a hot commodity. The difference between the two lenses is mainly reflected in distortion correction, image clarity and lens resolution. If you are not satisfied, take a few photos at the wide-angle end of the light source to see the dispersion, and then take a few photos in the room with unsatisfactory light to see the local sharpness.

Of course, the lens of 18- 135mm is not only a little longer than the focal length of 18-55 mm. Combined with the MTF diagram, it can be found that the pan/tilt of 18- 135mm has the advantages of clarity, high sharpness (relative edge) and the best central resolution among multiple sets.

Reason 4: Residual value.

If nothing else, the second-hand market is full of 18-55mm condoms. You can buy good colors for three or four hundred, and the price can be refunded. 18- 135mm big head is different, and there is demand for good colors. Many users with insufficient budget often choose brand-new fuselage and second-hand head, in a word? How are you? , lane is bad to make money later.

Can you establish another fixed focus?

After playing photography, you will soon come into contact with the basic concepts of aperture, shutter, ISO and white balance. You will start visiting the jar, join the photography group, get to know the old mage, and then be instilled with an idea: The fuselage is not important, the lens is the key? ! Although I know something about the equipment and understand my real needs at this time, making up my mind to add a lens will not be as decisive as buying a fuselage. ? Is it worth it? 、? Is it cost-effective? , even? Will the price be reduced in the near future? Let you struggle to death.

In fact, there are two lenses that can be bought together when buying. Canon users recommend 50mmf/ 1.8 as the cheapest large aperture, which is light and portable and suitable for all kinds of subjects, street sweeping or portraits. The aperture is reduced to F4, and basically the resolution and sharpness can kill any Canon zoom lens within 5K. Nikon users recommend 35mm f/1.8g. Compared with the title of 50mm, the price is much more sincere. Although the hood is ugly and far from perfect, the F 1.8 aperture can still be used if it is fully opened. The center is sharp enough and the edges are good. Taking pictures of humanity is a good hand, and the scenery is barely good. Indoor portraits are strong points.