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MARSHALL’S POV The electronics experts at Marshall discuss the benefits of global shutter cameras in sports production
performance in fast-paced action, racing and movement – reducing motion blur, lean or distortion within the field of view. Global shutter sensors perform better in these environments, as all pixels are exposed simultaneously. A good example of this is evident when capturing spinning propellers on a plane, or the swing of a bat or golf club. The image can appear warped or bent. Global shutters are designed to capture this type of movement completely, instead of rolling through it, enabling a ‘freeze frame’ truer to what a human eye would see. Also, where a large display might be in the background, global shutter cameras will remove the rolling effect seen on screen. SEQUENTIAL IMAGE CAPTURE Rolling shutter sensors scan through an image in sequence (usually top to bottom). These cameras are a good option for more traditional image capture, with typical motion within the field of view. Filming a speaker, singer or esports athlete isn’t as likely to contain superfast movement. In these scenarios, the rolling shutter sensor will have less noise and a wider dynamic range, while generating less heat. This has, historically, been a less expensive option than taking the global shutter path. But, they can sometimes cause warping, leaning or motion blur – in extreme cases, a global shutter should still be considered.
POINT OF VIEW (POV) cameras are used in all types of production. The
POV IS A MAINSTAY The unique ability to remotely adjust POV cameras from back in the control room has become even more relevant in today’s landscape of social distancing and reduced on-site staff numbers. A smaller team can capture the same quantity of camera angles throughout a venue, track or set as before. The ability to adjust, paint and match the cameras – easily and remotely – is now commonplace in video production. Marshall Electronics offers a superb range of cameras – and sensors – that can match the requirements of any POV production. The company has recently launched its CV568 and CV368 global shutter cameras with genlock. These POV models offer an impressive 1/1.8-inch Sony sensor with global shutter – as well as 25% larger pixel sizes – resulting in crystal-clear, low-latency capture even in low-light environments. The CV568 miniature HD camera is built into the same-sized body as CV503 and CV506 cameras. It has rear-panel protection, interchangeable M12 lenses, secure locking connections and remote adjust/match features. The CV368 compact HD follows the design of CV344 and CV346 cameras, with slightly larger CS mount lens types and a wide range of variable and fixed options. But the similarity stops there, as both models pack a larger, more powerful global shutter sensor with genlock (signal- sync), producing crystal-clear images at affordable price points. “The ability to adjust, paint and match cameras – easily and remotely – is now commonplace”
intention is to provide the viewer with an immersive experience, observing from that unique perspective. They can capture a reaction on a subject’s face, or witness an event, stunt or scene that would be too dangerous to capture in-person. Some key characteristics of POVs are their discreet size, durable builds and affordable prices, while still maintaining an image quality similar to larger-format cameras also in the production. Important features include the ability to remotely adjust and match cameras, as environments change and light fluctuates. Another factor is the sensor type and lens flexibility. Is it built around a rolling shutter or global shutter? The difference between the two can be quite drastic, pertaining to how the sensor scans the field of view. One is not better than the other, each has benefits and trade-offs, and both have a purpose in video production. SIMULTANEOUS IMAGE CAPTURE Global shutter camera sensors are nothing new to the production industry. When customers are challenged to capture faster motion – with cameras mounted in cars or motorcycles, for example – motion anomalies become more of a difficulty. This form of image capture improves
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DURABLE, FLEXIBLE, POWERFUL Cut from individual aluminium-alloy blocks, these compact cameras are robust
43. FEBRUARY 2022
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