Trivia about frame size

1. What is the difference between the size of the frame

1, the difference in imaging effect.

2, the equivalent of the difference between large and small film.

1, what is the frame size?

A: The format is the size of the CCD sensor area of the SLR camera, from large to small points large format, medium format, full-frame, APS-C format, APS format and so on.

Two, the origin of the SLR format?

A:

1, the 1820s, Germany developed the use of film shooting film 35mm (36mm * 24mm) film Leica camera, 35mm film is also known as "Leica roll", and later the world's factories to produce more and more cameras used to shoot 35mm film, "Leica roll". Later, as more and more cameras were produced in the world for shooting 35mm film, the name "Leica Roll" could no longer be adapted, so it was changed to "35mm film" according to the width of the film. Until after the 1950s, in order to distinguish between 35mm movie film and cameras.

2, with 35 mm bulk film, in the film box printed with the code 135. Later it was recognized that the 35mm film was called 135 film, and the camera with 135 film was called 135 camera. Speaking here I believe you will have a question, 135 (35) film size specifications is not 36 * 24mm? Why is it called 35mm film? Because the width of the film is 35mm to name. 36 * 24mm this is the imaging size of the film. Imaging frame ratio: 3:2. (i.e., the upgraded improvement above the 135 film as mentioned earlier) *** There are high-definition, classic.

2. What is the difference between the size of the frame

1, the difference in imaging effect.

2, equivalent to the difference between large and small film. First, what is the frame? A: The format is the size of the CCD sensor area of the SLR camera, from large to small sub-large format, medium format, full-frame, APS-C format, APS format and so on.

Second, the origin of the SLR format? A: 1, the 1820s, Germany developed the use of film shooting film 35mm (36mm * 24mm) film Leica camera, 35mm film is also known as "Leica roll", and then the world's factories produce more and more cameras used to shoot 35mm film, "Leica roll" this name has been used. Later, as more and more cameras were produced in the world for shooting 35mm film, the name "Leica Roll" could no longer be adapted, so it was changed to "35mm Film" according to the width of the film. Until after the 1950s, in order to distinguish between 35mm movie film and cameras.

2, with 35mm bulk film, in the film box printed with the code 135. Later it was recognized that the 35mm film was called 135 film, and the camera with 135 film was called 135 camera.

Speaking of this I believe you will have a question, 135 (35) film size specifications is not 36 * 24mm? Why is it called 35mm film? Because the width of the film is 35mm to name. 36 * 24mm this is the imaging size of the film.

Imaging format ratio: 3:2 . (i.e. upgraded and improved above the previously mentioned 135 film)****High definition, classic.

3. About the type of camera frame

From the small DC 1/3 (eliminated)

1/2.5

1/1.8 (which there is what 1/2.6,1/1.6 and so on the non-mainstream standard)

to 2/3

This is the length of the diagonal, the unit of inches, the ratio is 4:3 (). The ratio is 4:3 (the length and width can be calculated according to the Pythagorean Theorem)

Larger

X3 (seems to be Sigma)

Olympus 4/3 (2.0 factor)

Then there is the Canon APS-C (1.6 magnification)

Nikon APS (1.5 magnification)

Canon APS-H (1.3 factor)

135 full-frame (note that the "135" full-frame, the size is 36 * 24mm)

The above are small format, amateur drops, even if the big horse three such a machine, is also considered amateur in the professional machine

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Professional, medium (small) format, which is the 120 Standard:

645 -- 6 * 4.5 cm

66 -- 6 * 6 cm

67 -- 6 * 7 cm

69 -- 6 * 9 cm

Wide 617, 6 * 17 cm, with a large field of wide-angle lenses, the effect is extremely shocking

And then there is:

Quasi-large format (I think it is actually medium format): 4 * 17 cm. I think it's actually medium format): 4*5,4*5 inches, about 10*13 cm

True * large format: 8*10,8*10 inches four 4*5 so big, about 20*25 cm ---- than the full-frame 135 is bigger! Nearly 60 times if the 135 full is 20 megapixels 60 times....

Of course there are bigger ones, like medical X-ray negatives...

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Linhaf, Nissan TOYO and other brands, in fact, the large format body structure is not very complex, because there is no shutter aperture metering and other structures, but the precision requirements are high, especially the modern large format body are The large-sized body is actually not very complicated, because there is no shutter aperture metering and other structures, but the requirement for precision is higher, especially because modern large-sized bodies are shiftable axis, so the requirement for precision is higher.

The use of large format are specialized in large field lenses, Rodenstock, Schneider, Zeiss, Fuji, etc. There are corresponding products, of course, large format heads are sky-high.

4. What is meant by format

The so-called full-frame is for the size of the traditional 135 film. Previously, most of the digital SLR CCD size is smaller than the size of 135 film, and full-frame digital SLR CCD (or CMOS light-sensitive imaging elements) size and 135 film size is the same. And the larger the CCD size, the higher the image quality. And for users who already have a traditional DSLR, there will be no conversion issues with lens use. For example, the CCD size of the Canon EOS 350D is roughly equal to about 2/3 of the film size, and a 100mm lens on the EOS 10D becomes a 160mm lens after converting 1.6 magnification.

The traditional camera film size is 35mm, 35mm is the width of the film (including the perforated part), 35mm film has a sensitive area of 36 x 24mm. converted to digital cameras, the diagonal length of the diagonal length of about close to 35mm, the larger the size of the CCD/CMOS. In DSLR digital cameras, many have CCD/CMOS sizes close to 35mm, such as Nikon's D100, with a CCD/CMOS size area of 23.7 x 15.6, which is much larger than consumer-grade digital cameras, and Canon's EOS-1Ds, which has a CMOS size of 36 x 24mm, which is up to 35mm, and therefore has relatively good imaging. We'll call them full-frame.

Expressed in inches in the digital camera performance specification table is not the true size of the CCD, but there is a simple and practical way to find the true size of the CCD. The true focal length of the lens and the equivalent (equivalent) focal length of the digital camera or instruction manual are generally listed, and the ratio of the focal length of the equivalent 35mm camera to the true focal length, that is, the diagonal size of the frame of the 35mm camera and the actual diagonal length of the CCD than, from which the true size of the CCD can be easily calculated.

For example, the Panasonic LX2 (10.2 million effective pixels) lightweight digital camera using 1/1.65-inch CCD, the lens is quite focal length of 28-112mm, the real focal length of 6.3-25.2mm, the ratio of the two 4.44, the size of the 35mm camera frame 24x36mm, diagonal length of 43.2mm, 43.2/43.44 = 9.72mm. 4.44 = 9.72mm, which is the 1/1.65-inch CCD effective diagonal length, converted to the frame aspect ratio of 4/3, the real size of the Panasonic LX2 camera CCD effective light-sensitive imaging area of only one-twentieth of the full-size, for the size of the APS-C frame of one-ninth.

Now on the market of consumer-grade digital cameras are mainly 2/3 inches, 1/1.8 inches, 1/2.7 inches, 1/3.2 inches. the larger the CCD / CMOS size, the larger the light-sensitive area, the better the imaging effect. 1/1.8-inch 3-megapixel camera effect is usually better than 1/2.7-inch 4-megapixel camera (the latter's light-sensitive area is only 55 percent of the former). A 1/1.8-inch 3-megapixel camera is usually better than a 1/2.7-inch 4-megapixel camera (the latter has only 55% of the light-sensitive area of the former). While an increase in the number of CCD/CMOS pixels of the same size is a good thing, it also results in a reduction in the light-sensitive area of individual pixels, with the possibility of underexposure. However, if you want to maintain the current image quality while increasing the number of CCD/CMOS pixels, it is necessary to increase the total area of the CCD/CMOS while at least maintaining the area of individual pixels without decreasing. At present, the larger size CCD/CMOS processing and manufacturing is more difficult, and the cost is also very high. Therefore, CCD / CMOS size of the digital camera, the price is also higher. The size of the sensor directly affects the volume of the digital camera weight. Ultra-thin, ultra-light digital cameras are generally smaller CCD/CMOS size, and the more specialized digital cameras, the larger the CCD/CMOS size.

5. What is the difference between frame size and pixel aspect ratio

Frame size: the length and width of a picture, usually in pixels. For example, 4000X3000 means 4000 pixels long and 3000 pixels wide.

Pixel Aspect Ratio: It is the ratio of the length and width of a single pixel. Many people have a misconception that a single pixel is a small square, but it is not. The pixels of a computer monitor are generally square (i.e., the pixel aspect ratio is 1), and the pixels of a TV set are generally rectangular (there are two common ratios for PAl: 1.09 and 1.46)

If your video is displayed on a computer, please use square pixels (i.e., the pixel aspect ratio is 1), and if it is displayed on a TV set, please select the rectangular pixels (there is no uniform standard for the pixel aspect ratio).

6. How to see how much a video frame size

1, computer download a format factory, double-click to open;

2, in the left side of the menu bar, select the "video" option, as shown in the figure below the red box;

3, under the video menu, select the corresponding video format can be, here select the "video" option;

3, under the video menu, select the video corresponding to the format, here select the "format" option, here select the "format" option. format can be, here choose "MKV";

4, then a new MKV window pops up, directly drag the video, placed in the empty space below;

5, and then in the position of the screen size, you can see the video frame.