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Our mission: Bringing practical business and technical intelligence to today's structured cabling professionals

For more than 30 years, Cabling Installation & Maintenance has provided useful, practical information to professionals responsible for the specification, design, installation and management of structured cabling systems serving enterprise, data center and other environments. These professionals are challenged to stay informed of constantly evolving standards, system-design and installation approaches, product and system capabilities, technologies, as well as applications that rely on high-performance structured cabling systems. Our editors synthesize these complex issues into multiple information products. This portfolio of information products provides concrete detail that improves the efficiency of day-to-day operations, and equips cabling professionals with the perspective that enables strategic planning for networks’ optimum long-term performance.

Throughout our annual magazine, weekly email newsletters and 24/7/365 website, Cabling Installation & Maintenance digs into the essential topics our audience focuses on.

  • Design, Installation and Testing: We explain the bottom-up design of cabling systems, from case histories of actual projects to solutions for specific problems or aspects of the design process. We also look at specific installations using a case-history approach to highlight challenging problems, solutions and unique features. Additionally, we examine evolving test-and-measurement technologies and techniques designed to address the standards-governed and practical-use performance requirements of cabling systems.
  • Technology: We evaluate product innovations and technology trends as they impact a particular product class through interviews with manufacturers, installers and users, as well as contributed articles from subject-matter experts.
  • Data Center: Cabling Installation & Maintenance takes an in-depth look at design and installation workmanship issues as well as the unique technology being deployed specifically for data centers.
  • Physical Security: Focusing on the areas in which security and IT—and the infrastructure for both—interlock and overlap, we pay specific attention to Internet Protocol’s influence over the development of security applications.
  • Standards: Tracking the activities of North American and international standards-making organizations, we provide updates on specifications that are in-progress, looking forward to how they will affect cabling-system design and installation. We also produce articles explaining the practical aspects of designing and installing cabling systems in accordance with the specifications of established standards.

Cabling Installation & Maintenance is published by Endeavor Business Media, a division of EndeavorB2B.

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Canon Announces RF 100-300 f/2.8 L Telephoto Lens; YouTube Video First Look and More Info at B&H

Canon’s new RF 100-300mm f/2.8 L IS USM mirrorless lens format combines the versatility of a zoom with the reach and speed of the cherished telephoto concept.

B&H is pleased to announce the Canon RF 100-300 f/2.8 L IS USM telephoto lens.

This press release features multimedia. View the full release here: https://www.businesswire.com/news/home/20230419006089/en/

Canon RF 100-300mm f/2.8 L IS USM is a well-rounded lens for indoor sports, events and theater, fashion, and other subjects benefitted by the unique mixture of long reach, high speed, adept image stabilization, and fast autofocus. (Graphic: Business Wire)

Canon RF 100-300mm f/2.8 L IS USM is a well-rounded lens for indoor sports, events and theater, fashion, and other subjects benefitted by the unique mixture of long reach, high speed, adept image stabilization, and fast autofocus. (Graphic: Business Wire)

The new RF 100-300 f/2.8 L lens will join only a handful of other telephoto lenses in the RF lineup designed to fill the glaring gap left by the beloved EF 300mm f/2.8L lens.

Canon RF 100-300mm f/2.8 L IS USM Lens

https://www.bhphotovideo.com/c/product/1762615-REG/canon_rf_100_300mm_f_2_8_l.html

Key Features

  • Full-Frame | f/2.8 to f/22
  • Fast L-Series Telephoto Zoom
  • Dual Nano USM AF System
  • 5.5-Stop Image Stabilization
  • Floating Focus Design
  • Internal Zoom and Focusing Design
  • Function/Focus Preset Selector Switch
  • Fluorite, UD, and Aspherical Elements
  • SSC and Fluorine Coatings
  • Weather-Sealed Design

A welcome addition to many low-light photographers, the RF 100-300 f/2.8 L lens maintains a quick 2.8 aperture throughout the entire 100-300mm range. One of the most impressive aspects of this lens is its weight. At only 5.8 lb, Canon claims it is “the lightest f/2.8 zoom lens with a 300mm focal length on the market”―a venerable option for any Canon shooter trying to lighten their camera bag.

With the Canon luxury branding comes Canon’s signature lightning-fast autofocus. Two built-in nano ultra-sonic motors (USMs) can be thanked, in part, for this achievement. The independently actuated USMs allow the lens to focus effortlessly from close-up to infinity. Additionally, the weight and feel of the lens has been improved, reducing stress on your hand and wrist while taking handheld shots.

A focus preset button is also included on the RF 100-300 f/2.8 lens, which allows shooters to focus on a predetermined distance where they expect the action to occur. This is especially useful when photographing wildlife or sports.

Unsurprisingly, the lens is also built exceptionally well. Inside the RF 100-300 f/2.8 L is one fluorite lens, four ultra-low dispersion (UD) glass elements, a fluorine coating, and a super spectra (SSC) coating to help minimize ghosting and flare. Seals around the mount, switches, and rings prevent dust and moisture from entering the lens and a specially designed fluorine coating prevents grime from sticking to the exterior.

In line with some of Canon’s other RF telephoto lenses, the RF 100-300 f/2.8L has an impressive five-and-a-half stops of shake correction (which can be bumped up to six stops when paired with an in-body image-stabilized mirrorless body). This is a marked improvement over its predecessor, the EF 300mm f/2.8 L, which maxed out at four stops of stabilization.

Also, in line with other telephoto lenses in the RF series, the RF 100-300 f/2.8L has a dedicated, programmable control ring on its barrel. This ring effectively acts as a bonus button for the minimalistic EOS bodies and can be programmed to control anything from shutter speed to ISO. This is especially useful for quick adjustments on the fly.

Those looking to enhance the focal length of this lens periodically (at the expense of several f-stops) will be happy to hear that the RF 100-300 f/2.8L is compatible with two extenders: the Extender RF 1.4x or Extender RF2x. These extenders can expand the effective focal length to 140-420mm at f/4 with the Extender RF 1.4x, or to 200-600mm at f/5.6 with the Extender RF2x.

While the RF 100-300 f/2.8L may be financially out of reach for many photographers, it does indicate a significant step in fleshing out the Canon RF line. Additionally, the 100-300mm focal range will be an appreciated addition to the arsenal of many photojournalists, sports, and wildlife photographers.

Learn more about the Canon RF 100-300 f/2.8 L Telephoto Lens

https://www.bhphotovideo.com/explora/videos/photography/canon-rf-100-300-f28-l-telephoto-lens

YouTube Video First Look - Canon RF 100-300 f/2.8 L Telephoto Lens

https://youtu.be/6uYcytr-MQw

About B&H Photo Video

As the world's largest source of photography, video, and audio equipment, as well as computers, drones, and home and portable entertainment, B&H is known worldwide for its attentive, knowledgeable sales force and excellent customer service, including fast, reliable shipping. B&H has been satisfying customers worldwide for over 45 years.

Visitors to the website can access a variety of educational videos and enlightening articles. The B&H YouTube Channel has an unmatched wealth of educational content. Our entertaining and informative videos feature product overviews from our in-house specialists. You can view the B&H Event Space presentations from many of the world's foremost experts and interviews with some of technology's most dynamic personalities. Tap into this exciting resource by subscribing to the B&H YouTube Channel here. In addition to videos, the B&H Explora blog presents new product announcements, gear reviews, helpful guides, and tech news written by product experts and industry professionals, as well as our award-winning podcasts.

When you’re in Manhattan, take a tour of the B&H Photo SuperStore, located at 420 Ninth Avenue. The techno-carousel spins all year round at the counters and kiosks at B&H. With hundreds of products on display, the B&H Photo SuperStore is the place to test-drive and compare all the latest gear.

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