![]() Locate your test scene away from your camera to ensure that your Sigma lens can focus on it properly. It’s important that the surface be flat and featureless because you want the autofocus system to have nothing to focus on but the calibration target. No matter what you will choose for your test scene, make sure it’s an object with an easy to spot focus point and place it in the middle of high-contrast light for the best focus results. We suggest using specialized calibration charts, which are specifically designed for this purpose and can be easily purchased online. Just make sure that the scene you choose has plenty of contrast and detail. This can be anything from a simple piece of paper with a few lines drawn on it to a more complex arrangement of objects. The dock allows for a precise calibration, at different focal lengths and apertures which is essential for getting the most accurate results. The software does all the work for you and provides you with an accurate calibration. There’s no need to eyeball the process or use any special tools. This dock is what makes calibrating Sigma lenses so easy. Usually, the dock will be included with your lens when you purchase it, but if not, it can be purchased separately. The dock also comes with its own software, which you’ll need to download and install on your computer. This handy little device attaches to the base of your lens and allows you to connect it to your computer via USB. The first step is to purchase the Sigma USB Dock. The process is actually pretty straightforward and only requires a few simple steps. Now that we’ve gone over when you might need to calibrate your Sigma lens, let’s talk about how to actually do it. ![]() This will ensure that the two are working together optimally and that you’re getting the most accurate focus possible. If you’ve just purchased a new camera, it’s always a good idea to calibrate the lens to the body. This can knock the internal components out of alignment, causing focus problems. If you drop your lens or otherwise subject it to a significant impactĪnother reason you might need to calibrate your Sigma lens is if you’ve dropped it or otherwise subject it to a hard jolt. This is particularly true if you’ve recently changed lenses or camera bodies, as the new equipment could be throwing off the calibration of your existing lens. If you notice that your images are consistently soft or out of focus, it could be a sign that your lens needs to be calibrated. If you notice that your images are consistently soft or out of focus There are actually a few different scenarios where it might be necessary. You might be wondering when you would need to calibrate your Sigma lens. However, some lenses, especially telephoto lenses, may benefit from occasional recalibration. Most lenses do not require calibration unless they are significantly out of adjustment. This is usually done by using a calibration chart or software that measures the amount of blur in an image. When Would You Need to Calibrate Your Sigma LensĬalibrating a lens is the process of adjusting the focus of the lens to produce sharp images. Its lineup of lenses, which are available for most major camera brands, including Canon, Nikon, Sony, and Olympus, has earned Sigma a reputation as a leader in lens technology. ![]() Selecting a region changes the language and/or content on Corporation is a Japanese multinational corporation specializing in the manufacture of camera and photo imaging products.įounded in 1961, Sigma prides itself on its innovative and high-quality products. “And lens calibration corrects how ‘off’ the lens is.” “It’s like a miscommunication between camera and lens,” says photographer Jason Weingart. Your camera can tell you that it’s focused, but when you zoom in really close, you can see that it’s a little bit off.” “Say you’re shooting a client’s wedding, you use autofocus, and your image is focused on the back of their ear instead of their eye. “That’s the worst thing,” says photographer Felipe Silva. This leaves room for images to appear in focus in the viewfinder, only to be out of focus when they’re actually produced. However, in a DSLR camera an autofocused image requires clear communication between the lens (which lets in the light), the camera’s autofocus chip (which determines when the image is in focus), and the camera’s sensor (which creates the image). Theoretically, autofocus should always produce sharp images, with your chosen subject in focus. Lens calibration, also known as autofocus calibration, is a method of fine-tuning where the focus point falls in your image when you are autofocusing.
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