TAILIEUCHUNG - Complete Guide to the Nikon D200- P17

Complete Guide to the Nikon D200- P17:As with all my books, a full draft was reviewed by volunteers to weed out unclear language and misstatements. This book is better because of them. | only aperture and ISO overlap between the two exposures. When set to the defaults the D200 does its best guess at making everything work magically. As you ll learn in a bit the default settings for the camera are to balance flash and ambient lighting what Nikon calls TTL BL . That s not always what you want it to do and there are things that can keep the camera from succeeding at that. Flash Basics A flash produces a burst of light by pushing an electronic pulse across Xenon gas which causes it to react118. It does this in response to a signal from the camera that it s time to produce flash. For flashes with variable power ability such as those found in the Speedlight models and the internal flash the amount of light actually produced is determined by when the electrical signal to the Xenon is shut off When a flash fires at full power it essentially gives everything it has the Xenon gas responds as much as it can and eventually decays to nothing. That takes about 1 1050 of a second on an SB-800. When a flash fires at less than full power this is done by stifling the Xenon flash prematurely by removing the electrical impulse. On an SB-800 for example the flash can be shut off in as little as 1 41 600 of a second 1 128 power . In order to have any variability in flash output something has to measure the amounts of light produced and make the decision of when to shut the flash off. Either the D200 or the flash itself can both measure and control the amount of light. Yes this means that the D200 has something inside it that measures the light produced by the flash the 1005-pixel CCD 8I used to use the word ignite but technically that s not correct so I ve modified my wording slightly. Thom Hogan s Complete Cuide to the Nikon D200 Page 481 in the viewfinder is used for this job119 . Like the ambient exposure the CCD must get its measurements before the picture is taken which is why you ll see references to something called the preflash120. Why before the .

• Đồ họa - Thiết kế - Flash
• thiết kế web
• giáo trình CSS
• photoshop cơ bản
• thiết kế flash
• kỹ thuật cắt html
• Thiết kế trang web
• hướng dẫn Thiết kế trang web
• kinh nghiệm Thiết kế trang web
• tài liệu Thiết kế trang web
• cẩm nang Thiết kế trang web
• kỹ thuật Thiết kế trang web
• Bài giảng Thiết kế Web
• Đại cương Thiết kế Web
• Tổng quan Thiết kế Web
• Môn học Thiết kế Web
• Mục tiêu Thiết kế Web
• Giáo trình Thiết kế giao diện web
• Thiết kế và quản lý website
• Thiết kế giao diện web
• Nhận dạng các trang web
• Cấu trúc trang web
• phương pháp thiết kế trang Web
• kỹ thuật thiết kế Web
• thiết kế web nhanh
• thực hành thiết kế web
• thiết kế web đẹp
• tài liệu về thiết kế web
• thủ thuật thiết kế web
• mẹo dùng web
• học thiết kế web
• Thiết kế web động
• tài liệu Thiết kế web động
• hướng dẫn Thiết kế web động
• kinh nghiệm Thiết kế web động
• cẩm nang Thiết kế web động