the 1:1 lens still projects the same image size onto the sensor, the APS-C sensor just crops more off, giving the appearance of a closer shot as shown by a full frame sensor. BUT, if you were to take the physical size, projected from the lens onto the sensor, and enlarge them both equally, they will both be 1:1, at the same distance. Typical COF values are 30 microns for FF and 19 microns for APS-C, while the pixel size for even an 8 MP APS-C DSLR is around 6.

However, you could shoot with the same lens and from the same distance at the same aperture and still get the same DOF regardless of sensor size. So, a 50mm f/2.8 on a Full Frame camera is roughly equivalent to a 35mm f/1.8 on APS-C. To frame it for an APS-C sensor vs 35mm sensor, it requires changing your distance. Equivalent aperture describes the DOF difference between APS-C vs full frame cameras. It means I'm getting more distance to the object with APS-C sensor against FF sensor with same lens. The magnification comes when the image is enlarged to the final viewing size. To me, using the camera's viewfinder, I like the full-frame cameras for their larger, better,crisper viewfinder image, compared with low-end cameras that were APS-C and which had rather poor viewfinder image quality, due to pentamirror design, or just that small, tunnel-like APS-C viewfinder that is a hallmark of APS-C amateur cameras. So, yes I can see where you think magnification is more, but it's not. On a full frame 35 camera that is a subject 24 X 36mm, while with the same lens and extension, the subject size is 17 X 23mm on an APS camera.Īs mentioned earlier, to shoot a 24 X 36mm object full frame with the same lens on an APS camera, subject distance must be increased and extension reduced.

A full-frame image sensor requires a larger image circle than an APS-C image sensor, which means that the glass elements inside the lens need to be bigger to cover the full sensor area. I'm really excited about the better noise handling, the better IQ and all the goodness that comes with a full frame upgrade. Lens size The image projected by a lens is a circle. Hey everybody :) So for the past 6 months, I've been diligently saving towards the 6D, as I want to step into the world of full frame. Yes, as the others have said, 1:1 just means the subject size is the same as the sensor size. APS-C cameras can be made smaller and lighter than full-frame cameras.

Apsc vs full frame macro