![]() ![]() The title of this piece asks: Why is it confusing? ‘It’ here does not refer to ‘equivalent’, which is simple enough to understand. The only way to know for sure if the lens will work for your scene is to use it. Therefore, whenever you’re looking for equivalent lenses, getting a rough idea is enough. Lenses are not always precise! A 50mm lens from Canon will not match a 50mm lens for Nikon or Zeiss.E.g., a Canon 5D Mark III has a horizontal size of 36mm, while the Nikon D800E, another full-frame sensor, has a horizontal size of 35.9mm. So, the equivalent along one dimension (say, horizontal) will not translate into the equivalent on another (the vertical), and so on. Not only are sensor sizes different, but they might have different aspect ratios.In fact, looking for the exact equivalent is really stupid. We’ve already seen one scenario where you couldn’t get the exact same equivalent and had to compromise. To get the same scene, you realize you need a 12mm lens. ![]() Now, you can’t use 24mm on the smaller camera because it would give you a different scene. You quickly shoot the first with the full frame DSLR, using a 24mm lens. You want to shoot the exact same scene with both cameras. Here’s another way this information is helpful: Let’s say you have two camera bodies dangling around your neck – one a full-frame DSLR and another a Micro Four Thirds camera. Obviously, the lens used was a 50mm, but the same lens on an APS-C sensor gives the approximate equivalent of an 80mm lens on a full frame sensor. Using a bit of simple trigonometry you arrive at the conclusion that an 80mm lens was used. He gives you the distance to the subject and the width of the subject, and asks you to guess the focal length. This person shows you the final image, but lies to you and says it was shot on a full frame sensor. Now, let’s say someone uses this lens on a smaller sensor, say, APS-C, which has a sensor size of 22.3 × 14.9 mm, and parts of the scene that were visible with a full-frame DSLR sensor are cut off. Parts of the scene are cut off in the smaller sensor.Į.g. let’s say a 50mm lens on a full-frame DSLR camera (sensor size: 36mm x 24mm) covers a scene in this fashion: Even though the angle from the lens is the same (which is dictated by its focal length), the ‘projection’ changes. The outer box is a larger sensor, while the blue outline is the smaller one. Now, there are three ways to measure the scenery ‘projected’ on a sensor:ĭepending on how you use your camera, you might find yourself preferring one of the three. A larger sensor will always show you more scenery than a smaller one. Yet, the focal length of your eye remains the same. A larger window will show more scenery than a smaller one. Every camera needs a lens in front of it, and often, you can use a lens designed for one sensor on another sensor. There are full frame cameras (36mm x 24mm), APS-C cameras (e.g., 22.3mm × 14.9mm among others), Micro Four Thirds (7.3mm × 13.0mm), iPhone 5 (4.54mm x 3.42mm), and so on. Similarly with cameras, we have different sensor sizes. When you compare two things, one of them will be a standard, a known quantity.Į.g., if you travel abroad, you’ll be faced with the prospect of finding the ‘equivalent’ rates of the foreign currency to your local currency, so you know exactly how much you’re spending. In this case, the ‘standard’ is your local currency, the one around which your whole life revolves. A complete visual representation of the filmmaking process from beginning to end. ![]() Exclusive Bonus: Download your FREE Blueprint: How to make a movie. ![]()
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