Search results
Results from the WOW.Com Content Network
RetailMeNot.com, a digital coupon site in the United States [3] eConversions, the parent company of Gutschein-Codes.de in Germany and VoucherCodes, a voucher code site in the United Kingdom [19] [20] Ma-Reduc.com and Poulpeo.com, digital coupon and cash back sites in France [21] ZenDeals.com, a North American coupon site (October 9, 2013) [22]
Video demonstration of high-speed flash photography. A flash is a device used in photography that produces a brief burst of light (lasting around 1 ⁄ 200 of a second) at a color temperature of about 5500 K [1] [citation needed] to help illuminate a scene. The main purpose of a flash is to illuminate a dark scene.
Believed to be the first coupon ever, this ticket for a free glass of Coca-Cola was first distributed in 1888 to help promote the drink. By 1913, the company had redeemed 8.5 million tickets. [6] Coca-Cola's 1888-issued "free glass of" is the earliest documented coupon. [6] [7] Coupons were mailed to potential customers and placed in magazines ...
Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!
Main page; Contents; Current events; Random article; About Wikipedia; Contact us; Pages for logged out editors learn more
When using rear-curtain flash (when the flash fires at the end of the exposure) and a slow shutter speed, the distinction between the main flash and the preflashes is more obvious. [5] Some cameras and flash units take more information into account when calculating the necessary flash output, including the distance of the subject to the lens.
But on an overcast day, the problem is a lack of contrast. In overcast conditions adding flash will have the net effect of making the shadows darker. Even if the flash is near-axis fill flash it will fall off front-to-back more rapidly than the natural lighting and increase contrast.
Samigon ring flash unit attached to lens of single-lens reflex camera. A macro ring flash typically consists of a power and control unit mounted on a hot shoe, and a circular flash unit mounted on the front of a lens. Power is supplied by batteries in the shoe-mount unit and a cable conveys power and control signals to the circular flash unit ...