Lens adapter effect on Horizontal Angle of View

JVC Professional

APRIL 2007

NAB-2007

The ProHD Report

Using a 2/3-inch lens (with a native min focal length of 5mm) with the 1/3-inch adaptor increases the focal length by a factor of 1.97 to 10mm, producing a horizontal angle of view of approx. 27 degrees, which may not be wide enough for

HD ENG.

5mm – 1/3-inch lens – 52 degrees – no adapter

Lens adapter effect on Horizontal Angle of View

5mm – 1/2-inch lens

1/3-adapter – 37 degrees

5mm – 2/3-inch lens

1/3-adapter – 27 degrees

Fig. 22. This diagram shows that the Horizontal Angle of View is reduced when using ½-inch and 2/3-inch lenses with adapter to fit 1/3- inch camcorder given the same minimum focal length (in this case 5mm). Therefore, existing inventory of wide angle (½-inch and 2/3-inch) SD lenses are of particular interest to try to work with the ProHD camcorder, particularly lenses with 4mm or lower minimum focal length, and lenses with wide angle converters.

The bottom line using SD lenses in ProHD camcorders? If you have ½-inch and/or 2/3-inch SD lenses already in your inventory, then you owe it to yourself to try them out on your HD250U. The US list price for the HD250U without any lens is $9,995 and only $1,000 more ($10,995) with the standard professional Fujinon HD 16x lens. Depending upon your SD lens inventory (1/2-inch or 2/3-inch), add the ½- inch (JVC ACM-12) or 2/3-inch (JVC ACM-17) lens adapter for about $750. Shoot the same ENG test footage with the standard HD and the existing inventory SD lens, view the material (preferably) on a studio monitor with full native HD pixel resolution (JVC offers two suitable models of flat panel studio monitors) or on a JVC rear projection D-ILA HDTV, and then make your decision based on your specific situation. The wide angle models are likely to work better and be more suitable than the longer focal length models. You may perhaps decide that your HD ENG efforts may be sufficiently served for an initial period of time using some of the existing inventory SD lenses, limiting your initial investment. In the longer term, real HD lenses are required to provide optimum image quality and acquisition flexibility.

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NAB-2007 specifications

The JVC NAB-2007 is a notable entry in the world of professional broadcasting and production equipment, showcased by JVC at the National Association of Broadcasters (NAB) Show in 2007. This camcorder was designed to meet the demanding needs of videographers and broadcasters, emphasizing high-definition video quality and advanced technology.

One of the standout features of the JVC NAB-2007 is its ability to capture high-definition video in various formats. It supports both 720p and 1080i resolutions, allowing users to choose the format that best fits their production needs. This flexibility has made it a popular choice among filmmakers, event videographers, and news organizations looking for quality in their content creation.

The camcorder utilizes JVC’s advanced HD CMOS technology, which enhances image quality by providing better low-light performance and reducing noise. This is coupled with a powerful optical zoom lens that enables users to capture detailed shots from a distance, making it ideal for dynamic shoots where proximity to the subject may be limited.

Another key feature of the JVC NAB-2007 is its ergonomic design, which is crafted for ease of use during extended shooting sessions. The camera is lightweight yet robust, providing operators with comfort and stability. Additionally, the user interface is intuitive, allowing for quick adjustments to settings without disrupting the workflow.

Built-in stabilization features further enhance the usability of the JVC NAB-2007, ensuring that footage remains smooth even during handheld operation. This is particularly advantageous for documentary shoots or on-the-go filming where traditional stabilization rigs may be impractical.

Connectivity options are expansive on the JVC NAB-2007, including HDMI and component outputs, enabling seamless integration with various editing systems and broadcast environments. The camcorder also includes features for live broadcasting, making it versatile for both recorded and real-time production scenarios.

In summary, the JVC NAB-2007 encapsulates a blend of impressive features, cutting-edge technology, and user-centric design, making it a suitable choice for professionals in the broadcasting and film industries seeking reliable and high-quality performance in their equipment.