![]() 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. ![]() So these changes will be the same between the FE 50 mm f1.8 and the APS-C 50 mm f1.8. This is due to the different sensor size. And these are changed the same amount regardless of the APS-C design or FE full frame design of the lens. The smaller sensor effects the width of the view, amount of light collected and depth of field. (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. 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. This does not change the measurement of the lens focal length. A6xxx (and A5xxx and all the NEX) have a small sensor, crop factor is 1.5. ![]() A7 has a "full frame" sensor, same size as 35mm film. The crop factor is based on the size of the sensor in the camera body, and is the ratio of the sensor size vs. 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. Not for native lenses and neither for adapted lenses. And never apply a crop factor when thinking about it. And I think about 16 mm as a nice focal length for the zoom to start. Which means really identical in these aspects for the same year of sensor crop.īut I just have an A6000. "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". Only if you are comparing systems (lens plus camera) it makes sense to do the calculations: No matter it was meant for APS-C or for full frame. One can also do a calculation and come to on an 'equivalent' aperture.īut if you have experience with for example the A6000, and for example you like a 23 mm focal length f/4, you can get any 23 mm focal length that can be set to f/4. People generally agree that a bigger sensor means less depth of field and better low light results for the same aperture lens. Of course, that stays the same no matter what camera you put the lens on. A 50 mm f/2 lens has an "entrance pupil" (the size of the lens actually doing the work) of 50 / 2 = 25 mm diameter. The aperture is again a physical property of the lens. I saw you also had a question about aperture.
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