✔️ Composition finder for plein air artist, urban sketch artist, & photographers. ✔️ Size of a Credit Card - compact lightweightdesign fits in any wallet, camera bag or portable art kit. ⭐ An small American owned & operated company. This bundle includes the Golden Triangle + Fibonacci (aka Golden Ratio) Viewers. The Golden Triangle viewer is a great tool to help any artist compose their image. Whether you're a photographer, sketch artist, or plein air painter, use this viewfinder as a rule of thumb while composing your photographs or paintings, especially in situations with elements that follow diagonal lines. There's also a dot in the center to help you line up your composition more easily. This viewfinder is the exact proportion of 35mm full frame DSLR/Mirrorless cameras (3:2), so you'll get your composition just right. The Fibonacci Rule (aka Golden Ratio) has been around since the is also a great tool to help all artists/photographers compose their image. The Golden Ratio has been around since the 1200's and is a proven way to create the perfect proportion in your compositions. It can also be used as a non tech tool to help your kids interact with the environment; looking for the Golden Ratio in the environment. Use these viewfinders before you press the button or commit paint to canvas. Both of these cards have their pattern etched into crystal clear, 2mm, acrylic cards so they're completely waterproof and nearly unbreakable. They're also the size of a credit card ((85.6 mm X 53.98 mm (3.375 in X 2.125 in)) making them easy to keep in any wallet, camera bag or plein air painting kit.