A zoom lens lets you use a variable focal length. The Canon EF 70-200mm f/2.8L IS III USM is a zoom lens. It lets you work at a focal length of 70mm, 200mm, and anywhere between. A prime lens operates with a fixed focal length and low aperture value. For example, an 85mm, f/1.8 lens has a focal length of 85mm and an aperture of f/1.8. For example, f/2 on full-frame is equivalent to f/2.8 on medium format in terms of depth of field. APS-C is a stop less than full-frame, and 2 stops less than medium format. For the purpose of subject isolation, f/2 on APS-C has the look of f/2.8 in full-frame and f/4 medium format. Micro 4/3rds is another stop below, and so on down the line. Select the Sony APS-C crop factor with a value of 1.53x from the list of sensor sizes. Now the calculator is an APS-C focal length calculator. Go to the second section, "35mm full-frame equivalents", and input a focal length of 50 mm and an f-stop of 4. The resulting photos captured using the same focal length on full-frame (red), an APS-C sensor with a 1.5x crop (blue), and a Four Thirds sensor with a 2.0x crop (green). Itulah mengapa, kamera APS-C dan MFT tepi bingkainya terpotong, sedangkan kamera full-frame tidak. Hasil akhir focal length pada tipe APS-C dan MFT berasal dari focal length asli yang dikalikan dengan crop factor. Misalnya, kita memasang lensa 35mm pada kamera MFT yang memiliki crop factor 2x. Otomatis, focal length-nya berubah menjadi 70mm. Thus, a full frame camera is a clear winner in this factor in the battle of full frame Vs Crop camera. Consider reading, Micro Four Thirds Vs Full Frame Camera. 4. Effective Focal Length. Camera sensor of an APS-C camera comes with crop factor. The crop factor will have an effect on your effective camera focal length. iC8gLO. This changing of the distance between the camera and the subject is what causes that distortion, not the lens itself. So any camera and lens combination that's equivalent to 50mm on a full-frame camera will give the same sort of perspective distortion. It can be 35mm on APS-C, or 25mm on Micro Four Thirds, or 63mm on a Medium Format Fujifilm To get that look you have to choose the right subject distance and then to get the subject's face to fill the frame you need to choose a focal length to get that. If you are using an APS-C camera you will want to choose a 33mm lens. If you are using a full frame 35mm camera you will want a 50mm lens. Full frame has 61 MP and can crop in 2x down to 30 MP and they still have as many pixels in the result photo as what I started with on my APSC shot. If I do the same crop on the APSC shot, it would make a 16 MP image. For the same focal length of 50mm FF equivalent, the full frame camera has double the detail. So this lens on an APS-C camera will have the same field-of-view as a 52.5mm lens on a full-frame (i.e, 135 format or 35mm - don't get confused with the format being the same as the focal length - it's just a coincidence) camera. APS-C cameras have a crop factor in their lens focal length. Most camera brands such as Sony have 1.5x the stated focal length, whereas Canon is 1.6x. A 50mm Sony APS-C lens is the equivalent of 75mm on a full-frame. The “Focal length vs. angle of view” comparison illustrates this relationship for both 35 mm full frame and APS-C format cameras. * Focal length in ( ): equivalent focal length when mounted on interchangeable-lens digital cameras with 35 mm full-frame sensors

full frame vs aps c focal length