At many recent trade fairs such as the International Consumer Electronics Show (CES), Munich International Electronics Fair, Sensor Expo, Embedded Systems Conference and Global Embedded Expo, short-range wireless sensor networks have become the focus of attention. The ZigBee Alliance has been working hard to develop standards that provide control for general-purpose applications, including energy management, home automation, healthcare, and commercial building automation.
The two application areas we will explore in this article are home automation and healthcare. Although there are still controversies about whether certain applications have advantages, the chain reaction of rising oil prices and rising gas prices on household budgets has attracted widespread attention. How to monitor energy and how to save energy has become a topic of discussion after dinner. Hot topic. In addition, the increase in the aging population has increased the demand for health care services, which also brings business opportunities for the development of better quality medical health monitoring equipment. We believe that it is not only necessary to understand the recent work of ZigBee members who market these technologies, but also to evaluate the most relevant sensor networks related to these application areas.
Accessories for cameras are mainly for care, protection, special effects and functions.
Lens hood: used on the end of a lens to block the sun or other light source to prevent glare and lens flare (see also matte box).
Lens cap: covers and protects the lens during storage.
Lens adapter: sometimes called a step-ring, adapts the lens to other size filters.
Lens filters: allow artificial colors or change light density.
Lens extension tubes allow close focus in macro photography.
Flash equipment: including light diffuser, mount and stand, reflector, soft box, trigger and cord.
Care and protection: including camera case and cover, maintenance tools, and screen protector.
Large format cameras use special equipment which includes magnifier loupe, view finder, angle finder, focusing rail /truck.
Battery and sometimes a charger.
Some professional SLR could be provided with interchangeable finders for eye-level or waist-level focusing, focusing screens, eye-cup, data backs, motor-drives for film transportation or external battery packs.
Tripod, microscope adapter, cable release, electric wire release.
Dew shield - Prevents moisture build up on the lens.
Camera Accessories,Selfie Stick Adaptor,Smartphone Selfie Stick,Threw Hold Camera Accessories
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