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北京东方恒视科技有限公司

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北京东方恒视科技有限公司是一家多年从事广电摄录设备、专业的多媒体视频后期及周边配件的公司。公司自成立以来，一直奉行“以人为本、以技术为中心、以用户需求为导向、以服务为根本”的方针，积极的为广大用户提供了更多技术创新和更高实用价值的各类方案。目前是我国北方地区最大的广播器材销售商之一，2005年获得松......

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佳能镜头HJ21ex7.5B

产品编号：2389831 更新时间：2020-08-14

价格：

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北京东方恒视科技有限公司

主营业务：非编工作站，录像机，摄像机，硬盘播出系统，字幕机，磁盘阵列，...
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产品详情

产品详细描述：

The overall demand for HD production coupled with the growing diversity of production applicati*** has called for an expansion in the range of HD lenses. The HJ21ex7.5B was specifically developed to support high-end HD production where minimization of focus breathing (unwanted alteration to angle of view that accompanies manipulation of the focus control), high imaging performance, extended focal range and a modestly wide angle c***titute core production requirements for drama and documentary program origination. With the addition of the new digital drive unit the shooting versatility is further enhanced. The 7.5mm wide angle setting and the 21x zoom ratio offer a formidable operational combination for such high-end production work.
(New drive is loaded with the lens that has ‘A’ at the end of its model name such as ‘IRSE A’, ‘IASE A’.)

Main Features

	Specifically Designed for High-end HD Production
	Focus breathing and variati* in picture performance with refocusing at different object distances he been traditional imaging challenges to high-end production calling for high picture quality. By adopting the novel 3-group inner focus system and setting a proper power for the front lens fixed group as well as the focus moving group, the HJ21ex7.5B succeeded in minimizing such unwanted phenomena to an exceedingly low level. Also the lens is designed to maintain high optical performance across the entire 16:9 image plane, especially at the telephoto side of the focal length. Within the standard BCTV lens lineups c**isted of Wide, Standard and Telephoto lenses, the addition of the HJ21ex7.5B establishes its own important category supporting the special imaging requirements of the high-end HD production market.
	High Imaging Performance with Special Optical Elements and Exclusive Optical Layout
	With the goal of minimizing various aberrati* in order to meet the imaging standa* of high-end production, the HJ21ex7.5B adopts special optical elements that include the artificially re-crystallized “Fluorite” featuring extraordinary dispersion characteristics and the newly developed high index ultra low dispersion glass, “Hi-UD” glass. These lens elements are scientifically exploited by the design of an optical layout exclusive to this particular lens. The imaging achievement can be seen in its high optical specificati*** and extraordinary performance. Featuring a broad focal length range of 7.5mm to 158mm and a maximum relative aperture of F1.9, the lens maintains its high optical performance throughout the entire zoom range.
	New Ergonomic Drive Unit
	Besides the exceptional optical performance, another remarkable character of this new lens is it’s newly designed drive unit. With the goal of pursuing ease of operation, Canon has reached a new design based on human ergonomics, refined by a long term research and testing. Of course, all the advantages from the current e-HDxs Digital Drive Unit such as "Information Display for user customize setting", "Rotary Encoder for virtual studio integration and precise control" and "Enhanced Digital Functi**" are inherited to the new drive unit. See more information from our FAQ*

Lens		HJ21ex7.5B IRSE A / IASE A
Zoom Ratio		21x
Built-in Extender		2.0x
Range of Focal Length (with Extender)		7.5~158mm 15~316mm (2.0x)
Maximum Relative Aperture (with extender)		1:1.9 at 7.5~116mm 1:2.6 at 158mm 1:3.8 at 15~232mm 1:5.2 at 316mm (2.0x)
Angular Field of View (with Extender)	4:3 Aspect Ratio (8.8 x 6.6mm)	60.8° x 47.5° at 7.5mm 3.2° x 2.4° at 158mm 32.7° x 24.8° at 15mm 1.6° x 1.2° at 316mm (2.0x)
	16:9 Aspect Ratio (9.6 x 5.4mm)	65.2° x 39.6° at 7.5mm 3.5° x 2.0° at 158mm 35.5° x 20.4° at 15mm 1.7° x 1.0° at 316mm (2.0x)
Minimum Object Distance (M.O.D.)		0.85m (10mm with Macro)
Object Dimensi*** at M.O.D. (with Extender)	4:3 Aspect Ratio (8.8 x 6.6mm)	110.1 x 82.6cm at 7.5mm 5.1 x 3.8cm at 158mm 55.1 x 41.3cm at 15mm 2.6 x 1.9cm at 316mm (2.0x)
	16:9 Aspect Ratio (9.6 x 5.4mm)	120.4 x 67.7cm at 7.5mm 5.6 x 3.2cm at 158mm 60.2 x 33.9cm at 15mm 2.8 x 1.6cm at 316mm (2.0x)
Macro		Yes
Size (W x H x L)		175.2x122.5x260.1mm
Weight (Approx)	IRSE A	2.61kg(5.76lbs)
	IASE A	2.69kg(5.94lbs)

Operational Accessories

Full servo : SS-41-IASD / SS-41-D
Semi servo: MS-210D