#Full frame vs apsc full#

We will need to increase our ISO to ISO 225 on the full frame camera to compensate. However, keeping our shutter speed and ISO fixed, the 75mm f/3 lens will produce an underexposed image on the FF camera relative to the 50mm f/2 lens on the APS-C camera. Using a 50mm f/2 lens on an APS-C camera will give you the same field of view, and the same depth of field as using a 75mm f/3 lens on a FF camera. The FF вЂњequivalentвЂњ of a 50mm f/2 lens lens is in fact a 75mm f/3 lens, which you get by also multiplying the aperture by the crop factor. The 75mm f/2 lens therefore has a shallower depth of field than the 50mm f/2 lens, and lets in more light. A 50mm f/2 lens has a 25mm effective aperture diameter (50mm/2), where as a 75mm f/2 lens has a 37.5mm effective aperture diameter. However using a 50mm f/2 lens on an APS-C camera is not the same as using a 75mm lens with an f/2 aperture on a full frame camera. You multiply the focal length by the sensorвЂ™s crop factor to work this out. However because the resulting image is cropped relative to the FF image, the field of view on the APS-C camera is narrower, and actually the equivalent of using a 75mm lens on a FF camera. You will still get a correctly exposed image at 1/100th of a second and ISO 100. When the same lens is put on an APS-C camera, it is still a 50mm f/2 lens and the depth of field remains identical. For the sake of this example, letвЂ™s assume weвЂ™re at a shutter speed of 1/100th of a second which is required for the photo we want to take. When you take a photo with a 50mm f/2 lens on a FF camera it has a certain field of view and a certain depth of field. That means a FF sensor is 1.5 times wider and 1.5 times taller than an APS-C sensor. The crop factor of an APS-C sensor is, generally speaking, about 1.5. I wanted to write an abridged version for my own benefit, focusing on the questions I needed answered. The essay really is excellent, and extremely thorough, but it is also quite long and intimidating. So I did some research and stumbled across an excellent essay on equivalence by Joseph James: The more I thought about what I thought I knew, the less it seemed to make sense.

While considering this I realised that I didnвЂ™t fully understand the compromises IвЂ™d be making. So IвЂ™ve been thinking about moving to APS-C. IвЂ™ve considered small full frame options like the Leica Q, but ideally I still want interchangeable lenses. However, recently IвЂ™ve been placing more value on having a camera which can be with me more often, which means size and weight have become more important. The combination of large sensors, extensive lens ecosystems and excellent body performance puts them in the sweet spot between APS-C and medium format. That has repeatedly lead me to choose full frame (FF).

When choosing a new camera body, traditionally I look for something which will allow me to take the best quality photos in the greatest range of conditions.

Full frame vs apsc