4-Pack Cheatsheets- Pocket sized quick reference cards. Learn to take breath taking photos every time you use your camera. Digital Camera Guide, Photography Manual, Tips for use with Digital or Film SLR cameras. Use with Canon, Nikon, Olympus, Sony, Fuji, Pentax, Contax, Leica, Mamiya, Hasselblad, Bronica and more Concise, durable & ultra-light 45 cards with numerous how-to tips, tricks, techniques, and charts to help create stunning images Unlike most manuals, Quik Cards are written in easy-to-understand language Just clip them in your camera bag for quick help when you're out shooting Great reference for Beginners and Pros alike