If you have an APS-C sensor, that’s going to be a crop factor of 1.5. So a 50mm lens on full-frame, on an APS-C sensor it is going to be a 75mm, it’s going to be cropped in. You’re not going But while both lenses are equally bright, the Full Frame lens projects a larger image circle to match the four times larger sensor. As a result, both lenses are similarly bright, but the Full Frame lens passed four times the light volume. Equivalent Aperture for Depth of Field Explained. Aperture influences depth of field. Think about what APS-C mode is used for: it's used for lenses which project a smaller image circle. Those lenses are designed to illuminate an APS-C sensor which is half the size of a full frame sensor. In APS-C mode, on an A7R5 or any other full frame camera, only the APS-C part (inner part) of the sensor is used. Lenses designed to cover an APS-C format, can, again all things being equal, offer resolution every bit as good as an equivalent lens (adjusted for focal length correction) for full frame, and For example, a 50mm lens on a full frame camera will have the same field of view as a 75mm lens on an APS-C camera. Thirdly, depth of field is affected by focal length and aperture, so using a full frame lens on an APS-C camera will give you shallower depth of field than if you were using the same lens on a full frame camera. hWbu. For instance, a 300mm lens is 300mm on a full-frame camera, but on an APS-C model it becomes a much more desirable 450mm – great for getting close to the action in sports or wildlife photography. You have an APS-C camera with a crop factor of 1.53x (a super 35 crop factor), and you want to buy a lens that will give the same image as a 50mm f/4 full-frame lens. Here's what you do: 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. Depth of field: APS-C lens vs FF lens. 5 months ago. Let's say I have an APS-C camera body and two 50mm f/1.8 lenses. One of the lenses is designed for APS-C, while the other is designed for full frame. If I place my camera body on a tripod and take a photo with each of these lenses, using the same aperture and the same focus distance in both Though full frame usually allows for higher ISO usage, because the lens would be slower, I'd recommend going with an APS-C camera and a 17-55 f/2.8 over a full frame camera with a 24-70mm f/4 (unless you need that extra bit of wife angle). I've got a question regarding focal length conversion of lens to/from APS-C sensors: Full frame lens to APS-C: 1.5(ish) X focal length I get that since we're taking a larger area, and cropping it down by (theoretically) making the focal length of the lens longer, to bring down to the smaller sensor size of APS-C cameras

full frame to aps c lens conversion