Tham khảo tài liệu 'professional information technology-programming book part 6', công nghệ thông tin, kỹ thuật lập trình phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | . Take Along the Basic Accessories If your DSLR is just too clumsy to keep around your neck all the time get your hands on a prosumer pocket camera that has a 7 MP sensor a 3 1 optical zoom has full manual controls and shoots RAW files. As soon as I see one that also has image stabilization and is waterproof I m going to buy it. The other accessories are listed here in order of importance although ideally it s a good idea to have all of them along all the time Memory cards and batteries Memory cards and batteries are two things you should collect more of any time there s a bit of spare cash in your account. Having plenty of both is simply insurance that you won t have to stop shooting just when you happen on the most exciting shot of the day. Extra memory cards are also the best insurance against card failure. Gray card You can get a 10 percent digital gray card for 10 that s washable and is just small enough to fit inside your camera bag see Figure 2-8 . I bought two of them and cut one up into 3x4 inch pieces that fit neatly in a shirt pocket. Then even if I don t have my camera bag along I can just set it near my subject and snap a shot that will then allow either Photoshop or my RAW processor to automatically set a technically perfect white balance for all the other pictures I ve taken in the same lighting conditions. Figure 2-8. A photo of the Digital Gray Card. Flash Flash is your best assurance that you ll be able to get some sort of picture no matter how bad the light is. You probably have one along with you even if you haven t given it a thought they re built into virtually every digital camera that sells for between 300 and 5 000 dollars. However an external flash produces at least three times as much light and can be positioned so that its lighting is much more flattering than anything that can be produced by an on-camera flash. Reflector Anything white or silver that produces a good reflection from the main light source can be used to control the .
