I have a DSLR. Nikon D7200. I give tours every 2 days, hang the camera around my neck and go out. I am less inclined towards human pictures, but I am less interested in pictures of people with the image of my friend Mandhab Kalig. I took pictures of vines, leaves, flowers and fruits, field ghats, bushes, mountains and close up of insects and spiders. Nowadays people have understood and there is no point in bothering them, they will not take pictures even if they call it, I am also in peace. If you don't post anything about this camera, it will be unfair to the camera, if you post again, you can beat the drum of your picture, so write one.
DSLR stands for Digital Single Lens Reflex. The same image that comes to the sensor on a DSLR comes back to the viewfinder by turning on a few mirrors or prisms. Digital Single Lens Reflex is the name given to the image that comes in 2 places with a single lens. DSLR can also be used for live view like mobile. But the sensor of DSLR is 7-8 times bigger than the sensor of mobile. If you sense such a large sensor for a long time, the battery will run out quickly. So live view should not be kept on for long. The sensor size of a standard DSLR is 35 mm along the angle. 35 mm. This size has been adjusted to match the film. My D7200's sensor is small, that's what happens when you divide 35 by 1.5. So it is called 1.5x crop sensor. 35 mm. The sensor is called the flower frame. I will say all the next calculations for the full frame.
The quality of the image depends on the number of pixels in the sensor, as well as the size of each pixel. The smaller the pixels, the worse the image quality. Although the DSR has many large sensors, the number of pixels does not exceed 16 to 24 megapixels. Megapixels are like snake oil, people eat without realizing it.
The lens is fitted separately on the DSLR. Inside the lens are many optical lenses, mirrors, etc. These are called optical elements. DSLRs can zoom the lens by changing the position of these optical elements.
How big a thing looks will depend on the focal length of the lens. A 50 mm. An 8-foot-tall human can be photographed from a distance of 10 feet from head to toe with a lens. The same picture is 100 mm. You have to go 20 feet to get up with the lens. 200 mm. In this case 40 feet. A lens whose focal length cannot be changed is called a prime lens. The rest are zoom or non-prime lenses. If the focal length is more than 55, pictures can be taken from a long distance. We say, telephoto lens. Landscapes look good with a small focal lens, so they cover a wide area, so they are called wide lenses.
In addition to the focal length of the lens, there is a matter of minimum distance. A lens that, at its minimum distance, can fill an entire sensor with something equal to at least one sensor is called a macro lens. This type of lens is needed for insect photography.
Like camera sensors, lenses have a resolution that can be expressed in pixels. The resolution of the lens means the ability to separate two strands very close together. If the resolution of the lens is low, the image will be blurred, even if the resolution of the sensor is high, there will be no gain.
A very important property of the lens is the hole aperture. It is written as f / a. Aperture means how open the hole lens will be. The higher the aperture, the more light will enter the sensor. f / 1 means aperture much higher, f / 32 means much lower. If the aperture is high, the light will enter at a much higher angle, as a result the background will become more blurred. If you want to take a picture standing in front of the sea, if you keep the aperture high, but the sea will be blurred. In addition to the aperture, the larger the focal length the more blurred it will be. The closer the subject is, the more blurry it will be.
How long the shutter of the camera is open is called shutter speed. The longer the light enters, the brighter the picture. If you want to take a picture of a flying bird, the shutter speed must be very low, about 1/4000 second. Again, if you leave the shutter open for 30 seconds and take a picture of the night sky, you will see that the movement of each star can be understood.
That means more aperture means more light. Low shutter speed also means more light. Increasing the aperture will blur the background. Reducing the shutter speed will cause the subject to move. If you don't want any of the 2, then the 3rd is another option in your hand: to increase the sensitivity of the sensor. Its name is ISO. If you increase the sensitivity, you can take pictures by increasing the shutter speed in low light. Nothing is free. Increasing the ISO increases the signal to noise ratio, the image becomes noisy.
In DSLR's full manual mode you can control the aperture, ISO, shutter speed 3 times. You don't have to do anything in auto mode, all the cameras will take care of themselves.
ISO, megapixels These are the properties of the camera sensor. The sensor of a camera that can keep the noise low even by increasing the ISO is much better. Two other important properties of sensors are hole color depth and dynamic range. Color depth means how many different colors he can bring to a hole in a picture. Dynamic range means the maximum difference between the brightest part of the hole and the dimmer part. The dynamic range of mobile is low. When he goes to lift the sky, he turns the ground black. When you lift the soil, it makes the sky white. DSLR's dynamic range is much better than mobile. And the dynamic range of the human eye is bursting level.
This is basically the basics of DSLR. Sorry for the huge long article. Didn't want to pull in 2 episodes.
good article