The Canon Speedlite 600EX-RT flash represents a significant new release for Canon photographers, most specifically for those using off-camera flash. A very capable and reliable flash on its own, its real forte is when used as the heart of a radio-controlled flash system. Eliminating the need for third-party radio transmitters and receivers to wirelessly connect off-camera flashes to the camera, and without the restrictions of similar infrared systems that require line of sight, the 600EX-RT system provides solid and, in my test, very dependable real-life operation in the field.

Ever since its release in November 2013, the B1 off-camera flash has flown off the shelves as fast as Profoto has been able to deliver it to the stores. The most attention-grabbing features have always been the B1’s TTL metering and its cordless operation. Both of these convey the same message: the B1 is not a studio flash. It is an off-camera flash designed for on-location photography.

Our Picture This! assignment this month was Night Light, and readers sent in a wide variety of images from places around the world. The great photo ops of night lead to some unusual images: those made with long shutter speeds and high ISO settings to capture the often dim light; those that show a combination of still and motion, some subject and some photographer produced; and most of all the way photography allows us to see “into” the night in a way that no human eye can.

If you want the world to see your images, one of the easiest ways is with a free photoblog from Tumblr (www.tumblr.com). Free or low-cost templates give your blog the look you want. As a fan of Micro Four Thirds system cameras, I started a new blog (http://mirrorlessmusings.tumblr.com) to pick up where last year’s Picture-a-Day blog left off with a spin aimed at mirrorless photography. Using a free template, I had the blog up and running in 15 minutes, and you can, too. Tumblr is interactive so you can have a two-way conversation with admirers of your work. Don’t, as the parable goes, “hide your light under a bushel basket.” Sharing images is what makes photography the universal language and Tumblr makes it easy.