Comparison ZLRC SG907 Max vs Visuo SG106

Maximum flight time of a quadcopter on one full battery charge. This indicator is quite approximate, since it is most often indicated for ideal conditions - in real use, the flight time may be less than stated. However, by this indicator it is quite possible to evaluate the general capabilities of the copter and compare it with other models - a longer declared flight time in practice usually means higher autonomy.

Note that for modern copters, a flight time of 20 minutes or more is considered a good indicator, and in the most “long-lasting” models it can exceed 40 minutes.

The physical size of the photosensitive element of a camera. Measured diagonally, often indicated in fractions of an inch — for example, 1/3.2" or 1/2.3" (respectively, the second matrix will be larger than the first). Note that in such designations it is not the “ordinary” inch (2.54 cm) that is used, but the so-called "Vidiconovsky", which is less than a third and is about 17 mm. This is partly a tribute to the tradition that comes from television tubes — "vidicons" (the forerunners of modern matrices), partly — a marketing ploy that gives buyers the impression that the matrices are larger than they really are.

Anyway, for the same resolution (number of megapixels), a larger matrix means a larger size for each individual pixel; accordingly, on large matrices, more light enters each pixel, which means that such matrices have higher photosensitivity and lower noise levels, especially when shooting in low light conditions. On the other hand, increasing the diagonal of the sensor inevitably leads to an increase in its cost.

Resolution of the matrix in the standard camera of the quadrocopter.

Theoretically, the higher the resolution, the sharper, more detailed image the camera can produce. However, in practice, the quality of the "picture" is highly dependent on a number of other technical features - the size of the matrix, image processing algorithms, optical properties, etc. Moreover, when increasing the resolution without increasing the size of the matrix, the image quality may drop, because. significantly increases the likelihood of noise and extraneous artifacts. And for shooting video, a large number of megapixels is not required at all: for example, to shoot Full HD (1920x1080) video, which is considered a very solid format for quadrocopters, a sensor of only 2.07 megapixels is enough.

Note that high resolution is often a sign of an advanced camera with high image quality. However, this quality is not determined by the number of megapixels, but by the characteristics of the camera and the special technologies used in it. Therefore, when choosing a quadcopter with a camera, you should look not so much at the resolution as at the class and price category of the model as a whole.

The maximum resolution of photos that the standard quadcopter camera can take. This parameter is directly related to the resolution of the matrix (see above): usually, the maximum resolution of a photo corresponds to the full resolution of the matrix. For example, for pictures of 4000x3000 pixels, a sensor of 4000 * 3000=12 megapixels is provided.

Theoretically, a higher resolution of photography allows you to achieve highly detailed photographs, with good visibility of fine details. However, as in the case of the overall resolution of the matrix, high resolution does not guarantee the same overall quality, and you should focus not only on this parameter, but also on the price category of the quadcopter and its camera.

Also note that the high resolution of the camera affects the volume of the materials being shot, for their storage and transmission, more voluminous drives and “thick” communication channels are required.

The maximum resolution and frame rate supported by the aircraft camera when shooting in HD (720p).

HD 720p is the first high-definition video standard. Notably inferior to Full HD and 4K formats in terms of performance, it nevertheless provides pretty good detail without significant demands on the camera and processing power. Therefore, HD support is found even in relatively inexpensive copters. And in high-end models, it can be provided as an addition to more advanced standards.

In drones, HD cameras typically use the classic 1280x720 resolution; other, more specific options are practically non-existent. As for the frame rate, the higher it is, the smoother the video turns out, the less movement is blurred in the frame. In general, values up to 24 fps can be called minimal, from 24 to 30 fps — medium, from 30 to 60 fps — high, and speeds over 60 fps are used mainly for slow motion HD.

The maximum resolution and frame rate supported by the aircraft camera when shooting in Full HD (1080p).

The traditional resolution of such a video is 1920x1080; this is what is most often used in drones, although occasionally there are more specific options — for example, 1280x1080. In general, this is far from the most advanced, but more than a decent high-definition video standard, such an image gives sufficient detail for most cases and looks good even on a large TV screen — 32 "and more. At the same time, achieve a high frame rate in Full HD It is relatively simple and takes up less space than higher resolution content, so Full HD shooting can be done even on aircraft that support more advanced video formats like 4K.

As for the actual frame rate, the higher it is, the smoother the video turns out, the less motion is blurred in the frame. On the other hand, the shooting speed directly affects the requirements for the power of the hardware and the volume of the finished files. In general, values up to 24 fps can be called minimal, from 24 to 30 fps — medium, from 30 to 60 fps — high, and speeds over 60 fps are used mainly for slow motion Full HD.

Stabilization system built directly into the complete drone camera.

Any stabilization system is designed to compensate for vibrations and shaking, thus providing a stable image, without shaking and abrupt shifts in the camera. This feature slightly increases the cost of the device, but the quality of the video is noticeably improved. On the other hand, stabilization makes it difficult to perform complex manoeuvres, since when using it, feedback deteriorates: the change in the camera image does not quite correspond to changes in the position of the drone in space. Thus, in devices that have an acrobatic mode (see "Flight Modes"), such a system can be turned off.

Note that specifically in the camera, stabilization is most often carried out according to the electronic principle: a reserve space is allocated along the edges of the matrix, and during vibrations or shaking, the camera “pulls up” a fragment of the picture from this reserve, keeping the image in the frame motionless. This format of work somewhat reduces the useful area of the matrix, but it is inexpensive, does not affect the weight of the camera and does not complicate its design. Another option for compensating frame shifts is a mechanical gimbal stabilizer that uses a different principle of operation (see below); and some quadcopters provide both of these functions at once — this ensures maximum efficiency.

Camera gimbal equipped with mechanical stabilization system.

The mechanical gimbal stabilizer can be used in quadcopters with any type of camera (see above). The principle of operation of such a device is as follows: a system of sensors and gyroscopes monitors vibrations, vibrations and other extraneous movements of the camera and, if necessary, slightly shifts or rotates it on the suspension so that the image in the frame remains smooth, without jerks and sharp shifts. A similar function is performed by the stabilization built into the camera itself (see above), however, a stabilized gimbal has a number of advantages over it. Firstly, it allows you to use the entire area of the matrix, which further contributes to image quality. Secondly, the “picture” turns out to be quite stable even if the installed camera does not have a stabilizer. And in some modern drones, both stabilization methods are provided at once — both a suspension and a built-in camera; This slightly increases the cost, but the efficiency is maximized.

The ability to remotely control the quadcopter camera. The set of features provided by such control depends both on the type of camera (see above) and on the specific model. So, when using a third-party camera on a gimbal, control functions are most often limited to turning and tilting the lens; but for regular cameras, start and stop shooting, fixing a photo on command, changing the viewing angle, etc. can be provided.