"How would the Sigma 18-35 mm f/1.8 on an APS-C camera compare to a full frame setup?" and the answer is then "It is like a 27-53 mm f/2.7 on full frame, for focal length, sensitivity, depth of field and image noise". Which means really identical in these aspects for the same year of sensor crop.īut I just have an A6000. And I think about 16 mm as a nice focal length for the zoom to start. And never apply a crop factor when thinking about it. Not for native lenses and neither for adapted lenses. If I were to take the sony full frame e-mount 50mm f1.8 lens and put it on my A6000 body, would it become Since the e-mount is physically the same on the A6xxx and the A7, I was wondering if the crop factors still apply if I use an e-mount full frame lens on my A6000 APS-C body. The crop factor is based on the size of the sensor in the camera body, and is the ratio of the sensor size vs. A6xxx (and A5xxx and all the NEX) have a small sensor, crop factor is 1.5.Ī7 has a "full frame" sensor, same size as 35mm film. This does not change the measurement of the lens focal length. So the FE 50mm f1.8 lens is the same focal length and aperture as the older APS-C 50mm f1.8, and would have the same view and aperture on the A6xxx. (and the APS-C lens has OSS, I think, unlike the new FE lens?) On the A7, the APS-C lens would likely vignette on the areas of the sensor that are larger than the APS-C sensor the lens was designed for. The smaller sensor effects the width of the view, amount of light collected and depth of field. And these are changed the same amount regardless of the APS-C design or FE full frame design of the lens. This is due to the different sensor size. So these changes will be the same between the FE 50 mm f1.8 and the APS-C 50 mm f1.8. The view that you would be framing, standing in the same place, looking at the same subject, an Axxx with a 50mm lens (ANY 50mm lens) would be about the same as being in the same place looking at the same thing with an A7 using a 75mm lens.
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