But here, good camera friends have to say that Sony's named Quan Huafu micro-single A7 series is really incredible, which leads to many newcomers who can't tell who is who. Take the third-generation Sony A7 series as an example. The names circulating in the market are: a7r3, a7m3, a7s3, a7rm3, a7sm3, a73, etc.
The complicated but extremely similar and possibly confusing names make people's heads get bigger before they start choosing cameras.
So in today's article, Good Machine Friends Photography will talk to you about the characteristics of various models of Sony A7 series and how to choose them.
Contents
1. What does Sony RSM stand for?
two. Release time and price
III. A7iiia 7A7C is used to purchase
IV. A7R3A7R4 can choose
the verb A7S2, A7S3 can buy
the intransitive verbs A1 and A9 can choose
What does Sony RSM stand for
Before choosing the machine, we should find out what kind of models the R, S and M of Sony A7 series refer to respectively.
1.r stands for flagship image quality.
in p>A7 series, the model with r belongs to the flagship model of image quality, and its positioning is biased towards picture shooting.
The words A7R, A7R2, A7R3 and A7R4 we hear most often mean that A7 # 39 is the first generation, the second generation, the third generation and the fourth generation respectively.
these models are characterized by many pixels, good image quality and good video recording ability, and they are also the most concerned models for photographers.
the a7rm3 or a7rm4 seen in the market are actually a7r3 and a7r4. QuotM quot This is the abbreviation quot Mark quot in English, which stands for the first generation. Rm3 is the third generation model of R series, and rm4 is the fourth generation model of R series.
it is worth mentioning that in April 212, Sony also released the upgraded versions of A7R3a and A7R4a. The only difference is that the screen pixels have been upgraded from 1.44 million to 2.35 million.
2.s stands for the flagship model of video
A7 series models with S belong to high sensitivity and video models. This model has the least audience and is specially developed for enthusiasts who use micro-single to record videos.
the video shooting ability of this model machine is very outstanding, which is a grade better than the R series. But at the same time, the pixel is the lowest among R, M and S, which is also a compromise for recording ultra-high frame video.
in addition, the high sensitivity performance of these models is also outstanding. For example, A7S3 is acceptable when ISO reaches 256, but A7R3 will have color cast at this sensitivity.
like a7rm3, the A7SM3 seen in the market is actually A7S3, and m means quot mark quot for you.
3.m stands for comprehensive performance model.
the model with m in it is actually the product that exists as the mainstay in A7 series, that is, the comprehensive performance model. According to Sony's definition, it belongs to the new benchmark of Quan Huafu, which is a model to set a benchmark for Quan Huafu Micro-single.
in terms of pixels, it is not as high as R series; On high sensitivity and video shooting ability, it is not as high as S series; But it's good in every way. It is the most suitable model for photographers.
Many photographers have consulted their good friends about which R series or M series to choose. A good friend's answer is that M series is more cost-effective. For pixels with high Tang value, it is correct to choose M series.
3 million pixels, not low, is the mainstream pixel in Quan Huafu. If you don't want to slash it, it will be enough, including holding a personal film festival in the future. If you want to print, that's enough.
but if you use it for commercial shooting or often cut photos on a large scale, then choose R series.
If the models you see are A72, A72MK and A73, they actually refer to A7M2 and A7M3, which are the second and third generation comprehensive performance models of A7 series.
4.c stands for portable model
A7C is the first C-series model, and its performance is equivalent to A7M3, but its body size is smaller, and it is equipped with a flip screen, which is more suitable for photography enthusiasts who want to shoot vlog or pursue portability. For the possibility of a7c 2, or A7C2.
5.A1 stands for the top flagship
A1 quot currently has only the first generation model, which was released in January 221. With the powerful combination of ultra-high resolution, hi
high focus tracking speed, 2 high-speed continuous shooting per second, A9 series cameras are synonymous with high speed, so that you can miss every moment, which is suitable for shooting sports subjects. Many sports photographers use this camera.
5. Abstract
Finally, good camera friends rank pixel, focusing speed, video shooting, high sensitivity and price according to A1, A9, A7R, S, M and C, so that you can better understand the advantages and disadvantages of A7 series models:
pixel: ra1gt; mA9C gt； S
focusing speed: a1 gt a9 GTS GTMC gt; R
video shooting: a1 GTS GTR GTMC GT; A9
high sensitivity: a1 GTS GTA A9 GTR GTM C.
price: A1 gtA9 gtS gtR gtM C
It is particularly important to note that although the S camera is the most expensive, it is suitable for relatively few people, because its pixels are much lower than R and M, and it is a camera specially used for shooting videos. Therefore, there is no need to follow quot; Buy the most expensive equipment if you have money quot;
release time and price
Sony cameras should not follow the law that the bigger the number, the newer and more expensive it is. For example, the number of A1 is the smallest, but it is actually the model that went on the market in 221, and it is the most expensive.
model
release time
official website starting price
historical lowest price
A7R3
217.1
23999
14399
A7R4
219.7
26999
. p>19299
A7M3
218.3
14599
11499
A7M4
221.1
16999
16999
A7C
22.9
12499
11999
A7S3
22.7
23999
23999
A9II
219.1
34999
3599
First-class
221.1
47999
47999
Next, let's analyze the characteristics of 11 Sony models for photographers and help you buy the models that best meet your budget.
:
A7IIA7C7
1. Sony A7M3
As far as CMOS, the most important image sensor of digital camera, Sony A7M3 adopts back-illuminated sensor, which has more light input than A7M2. Therefore, when shooting in a low light environment, the noise of the picture will be less and the picture quality will be higher.
in terms of focusing, A7M2 phase detection focuses on 117 points, contrast detection focuses on 25 points, A7M3 phase detection focuses on 693 points, and contrast detection focuses on 425 points, with a focus coverage rate of 93%. As can be seen from the figure, the focusing performance of A7M3 is much better than A7M2.
At the same time, A7M3 supports 4K video shooting, which is a qualitative leap compared with A7M2, which can only shoot ultra-high definition video.
another thing worth mentioning is the endurance of the A7M3. A7M2 can only take about 27 photos on a single charge, and A7M3 can take about 61 photos, which more than doubles the battery life. Although its battery life is still not as good as that of a SLR camera, at the very least, the battery life problem starts with A7M3 and is no longer a short board.
Therefore, compared with A7M2, A7M3 has greatly improved in sensor, focusing and video shooting. It can be said that it is an epoch-making product of A7M3 series. As long as the budget is enough, you will never regret going to A7M3.
2. Sony A7C
The performance of A7C is basically the same as a7m3, so why does Sony produce such a camera? In fact, it is mainly the first step to seize the micro-single market of small cars in Quan Huafu. Because the main group of digital cameras is ordinary photographers, not professional photographers, there is always a requirement for the size of the fuselage.
At present, Canon and Nikon are also developing small-size full-frame cameras, but Sony has taken the lead.
Therefore, A7C is more suitable for people with sufficient budget, and it is also a light choice pursued by photographers. Professional photographers do not recommend it. After all, the small fuselage leads to fewer buttons and insufficient maneuverability. Moreover, if you take a job, bringing a small camera will be mistaken for unprofessional by customers.
3. Sony A7M4
A7M4 was released in October, 221 and went on sale in November. It has a brand-new 33-megapixel sensor and uses the powerful BIONZ XR processor of A1 model.
Compared with A7M3, A7M4' s upgrade in picture shooting and video can be said to be all-round. I think it is also worth upgrading for friends with old models.
4. Purchase suggestion
Sony A73 should be the most cost-effective choice at present. As for A7C, pursue portability, make a vlog, and choose him. Take the job, or pursue control and stability, or A7M3 or A7M4.
this camera was once fired to 21, yuan, and now the price has dropped back to the price at the time of sale.
:
A7R3A7R4 selection
1. Sony A7R3
A72 was upgraded to A7R3
First, the sensor was the same as A7R2, but the processor was upgraded, and the image processing speed was 1.8 times higher than A7R2. In addition, the noise reduction ability is stronger, which is one step higher than A7R2. For example, setting the sensitivity of A7R3 to 32 is equivalent to setting the sensitivity of A7R2 to 16.
It gives people the impression that the upgrade of A7R3 is soft, that is, the hardware has not changed, but the software processing ability has become stronger. It's just like the computer we use. If we install a better optimization system, it will be smooth to use.
In terms of focusing, A7R3 has greatly improved compared with A7R2, mainly reflected in the contrast focusing from 25 points to 425 points. In actual use, you can really feel the obvious improvement of focusing speed.
In addition, A7R3 can reach -3EV in weak light, while A7R2 only has -2EV.
compared with A7R2, the biggest improvement of A7R3 lies in the continuous shooting speed. As a 42.4 megapixel model, the continuous shooting speed of A7R2 can reach 5 frames per second, while the continuous shooting speed of A7R3 can reach 1 frames per second.
in a word, although A7R3 is better than A7R2 in terms of image quality, focus and continuous shooting, it has not reached the cross-age level like A72 and A73, but it is just the icing on the cake.
2. Sony A7R4
From the performance introduction of A7R4, the biggest upgrade is the 61-megapixel sensor. Other upgrades are either average or not available to ordinary photographers.
if you don't know much about the use of high pixels, you can read: pure pixel hero? The mobile phone has 4 million pixels. Will the 2-megapixel SLR lay off employees?
if you currently have A7R3, there is no need to upgrade to A7R4；; If you are going to buy a Sony micro-order, or you are still using A7 and A7R2, you can upgrade to A7R4 with sufficient budget. If the pursuit of cost performance, it is recommended to enter A7R3.
3. Purchase suggestion
If you don't need to use high-pixel pictures or shoot high-pixel sports photography, A7M3 is much more cost-effective than A7R3. Compared with A7R2, A7R3 has improved performance and image quality. If the budget is enough, we can start now.
as for A7R4, as mentioned above, unless you have a demand for high pixels, or need a camera with more powerful video shooting performance and more professional functions, then A7R4 is a suitable choice. After all, the strength of A7R4 is still the top spot in Quan Huafu.
:
A7S2 and A7S3 are optional
1. Sony A7S2
Although Sony A7S is a video player, it seems that focusing and anti-shake are far from each other, and these two are very important for video players, so it is not recommended.
Although A72 is Sony's first Quan Huafu micro-camera that supports 4K video shooting, its focus is even worse than A7R2, and its advantages are only high sensitivity and high writing speed brought by low pixels. So unless you only shoot videos or often sweep the streets, it is not recommended to start with a7s2.
In addition, Sony A7SII can not only realize the direct recording of camera body, but also support the anti-shake function of five-axis camera body, which can not only play a role in photo shooting, but also play an anti-shake role in video shooting, greatly improving the stability of shooting. For this reason, more lenses without anti-shake function can enjoy the anti-shake effect brought by Sony A7SII.
2. Sony A7S3
As an iterative product of A7S2, Sony A7S3 has kept us waiting for 5 years. Fortunately, A7S3' s video shooting ability is experienced enough, which is nothing. As for the details of this model, A7S3 has finally arrived in 5 years! Choose A7S3 or Canon R5? This article has been explained in detail.
compared with other video models with the same price on the market, the biggest highlight of Sony A7S3 is that the dynamic range reaches 15 levels, and as long as the power and memory card capacity are sufficient, there is no limit on the shooting time of 4k video, so that video creators can record videos without any worries.
and whether it is focusing, anti-shake or high sensitivity. If the money is not bad, it can be said that A7S3 is one of the best choices for video shooting at present.
this camera was once fired to about 3, yuan, and now the price is back to the price when it was released.
3. Purchase suggestion
As A7S2 is an old video model, its shooting performance in some aspects is even worse than that of A7M3 and A7R3, which mainly focus on taking pictures. Not to mention that A7S3 has to dump A7S2 for several grades in almost any performance parameter.
Therefore, good camera friends strongly recommend A7S3 for video shooting, because it is a video camera that you will never regret buying.
:
selection of A1 and A9
:
A1. Sony A1
Sony a1 was released on.