What's the difference between a SLR camera and a digital camera? How many photos can be stored in 2GB of memory?

Look at the quality of each photo. General mobile phone photos, 600*800 in size, can store 6000 6 million pixels.

1.3M/ sheet can be stored1more than 500 sheets100000 pixel 3M/ sheet, which can store more than 700 sheets.

The full name of SLR is SingleLensReflex, a single-lens reflex camera. The biggest feature of this camera is the single lens angle of view. Generally, the optical framing and shooting of cameras are separated (the LCD framing of small DC does not belong to the optical viewfinder, so it is also together). For example, the paraxial camera, that is, the scene seen in the viewfinder is different from the lens used for the final film exposure, so the problem is that there is parallax between what is seen in the viewfinder and what is finally taken. SLR uses a mirror. When shooting, the reflector reflects the light at an angle of 45 to the viewfinder above. When shooting, the mirror is raised and the light is exposed through the shutter behind the mirror. So you will see the viewfinder black when shooting. The advantage is what you see is what you get, but the disadvantage is that because of the existence of the reflector, the tail of the lens is far away from the photosensitive element, and the vibration of the reflector will lead to the decrease of the sharpness of the photo (which will be affected by the low-speed shutter)

The framing of ordinary digital cameras is also a single lens, that is, in the LCD framing mode, the light also enters from the main lens for shooting. But this kind of electronic viewfinder is not as good as optical viewfinder at present.

The difference between SLR and digital camera lies in:

1 CCD or CMOS, the SLR only works when shooting, while the small DC photoreceptor works when shooting, which leads to the longer working time of the photosensitive elements of ordinary digital cameras, which is easier to generate heat and affects the image quality.

2. The CCD or CMOS area of SLR is much larger than that of ordinary digital camera. The size of the photosensitive element of an ordinary digital camera is generally equivalent to the size of a fingernail (many of them are not up to the level of the thumb fingernail), while the size of the APS-C frame machine in SLR is about 24× 16mm, and the overall size is about 35×.

23,5 mm, because of the large area, the pixels per inch are low, and the imaging is more pure.

3. The optical viewfinder of SLR is much clearer than the current electronic viewfinder.

4. The actual focal length of SLR is larger than that of ordinary digital camera, that is to say, the same focal length of 135 is equivalent to 50mm, the actual focal length of APS frame machine is about 35, and the actual focal length of ordinary digital camera is about 10mm, which leads to that the depth of field of SLR is smaller than that of ordinary digital camera, and it is easier for SLR to send photos with clear prospect and blurred background.

5. Because the price of SLR is more expensive and the image processing chip used is more powerful, the machine reflection of SLR is much faster than that of ordinary digital camera. Even now, there is still a certain gap with SLR.

6, SLR continuous shooting and other professional functions are stronger, faster and more convenient to control, and more suitable for photography creation.