![]() ![]() While, contrary to popular belief, a larger sensor does not reduce the depth of field, the fact is that in order to get the same field of view with a smaller sensor, you will have to either take a shorter focal length, or move backwards, or do a combination of both, giving the impression that the larger sensor does indeed reduce the depth of field. It is the field of view that varies depending on the size of the sensor on which you place the lens.Īnother aspect of the image that we think about when choosing a sensor size is the depth of field. It doesn’t matter if it was originally designed for APS-C or FF format, the focal length of a lens doesn’t change. Remember, the focal length given represents the result on a full frame body. So don’t be fooled when seeing some large aperture lenses in Micro 4/3 format. Nevertheless, it is relatively important to understand this equivalence because you will find for example many articles on the internet advising you to buy a 50mm, but this advice mainly applies to the FF so you will therefore have to transpose all the reasons to buy this 50mm to buying a 35mm on APS-C or a 25mm on Micro 4/3, which are the equivalents. Just be aware that the shorter the focal length, the larger the field of view and vice versa. In reality, these conversions are just conventions and for someone who has never used a FF sensor, it doesn’t really make sense. Also, a 50mm mounted in front of a Micro 4/3 sensor will give a field of view equivalent to a 100mm mounted in front of an FF (50×2=100).
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