Astera has unveiled a 5-inch battery-powered LED PAR spot with a Fresnel lens, QuikPunch. QuikPUnch follows on from Astera’s 3-inch lens QuikSpot but scales up the size, lux output, and beam control.

Make a lens and a magnifying glass by filling a bowl with water. A round bowl of water can act as both a magnifier and a lens. Place the lightbulb or candle more than 1 foot (30 cm) from the ...

Erik is an 18 time Emmy award-winning DP, with over 20 years experience in photojournalism, working in newsrooms all over the USA. The last decade has seen Erik migrate into broadcast television and ...

Erik is an 18 time Emmy award-winning DP, with over 20 years experience in photojournalism, working in newsrooms all over the USA. The last decade has seen Erik migrate into broadcast television and ...

Almost any camera and any wide, standard, or telephoto lens combination are capable of capturing great ... and take a look at the landscape photography cheat sheet (above), which you can enlarge by ...

A few decades later it received the lens it currently uses: a first-order Fresnel lens. Lighthouse buffs may know that the Fresnel lens is called 'the invention that saved a million ships.'During ...