Your DSLR flips the picture around automatically. See how the larger sensor is able to capture the entire reflected image, but the smaller sensor can't? That's why! Also, notice the reflected image is upside-down. If you're more of a visual learner, check out the picture below that explains the concept. Naturally, the larger the sensor is, the more of the focused image it can see. The lens creates the reflected scene and puts it on the image sensor, which records the light focused by the lens. Physics, that's why! Remember that the job of the lens is to take a scene and focus it to a small area. WHY Does the Sensor Size Change the Field of View? This chart is based upon a 1.5x crop factor, which is the most common crop factor for “crop sensor” aps-c size sensors in DSLRs.Īccording to the table above, for example, you would have to use a 75mm lens on a full frame camera in order to get a photo with the exact same field of view as a photo from a crop sensor camera shooting at 50mm. Canon cameras will be ever so slightly more zoomed in than even what the table shows. On the table below showing the equivalent focal lengths of a full frame and crop sensor camera, I have used the more common 1.5x crop factor. That means that if you take an 18mm lens and put it on a Canon and Nikon, the Canon picture will be slightly more zoomed in. The crop factor for most Canon DSLRs is 1.6x. The crop factor on APS-C crop sensor DSLRs from Pentax, Olympus, Sony, and Nikon is 1.5. Please keep in mind that not all crop sensor DSLRs have the same size sensor. The inner rectangle is the photo taken with a Nikon crop sensor DSLR, the full outer picture is taken at 18mm as well, but with a full frame camera. The sample picture below shows a picture taken at 18mm on a crop sensor camera, and the same picture at 18mm on a full-frame camera. The larger sensor captures more field of view than the crop frame camera if all else is equal. This physical difference in the size of the sensor changes the physics of how the lens focuses the image on the sensor. A full frame sensor is physically larger than a smaller crop frame APS-C sized sensor. What does a picture look like at 18mm on a crop frame camera, compared to 18mm on a full frame camera?įield of View, and How it is Impacted by the Crop Factorįield of view simply means the amount of the scene that you can capture in one frame.
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