f: Changing the Depth of Field

Using the Built-in Flash

To obtain a correct flash exposure, the flash output will be set to match the set aperture (autoflash exposure). The shutter speed will set automatically between 30 sec. - 1/200 sec. to suit the scene’s brightness.

In low light, the main subject is exposed with the automatic flash, and the background is exposed with a slow shutter speed set automatically. Both the subject and background look properly exposed (automatic slow-speed flash sync). If you are handholding the camera, keep it steady to prevent camera shake. Using a tripod is recommended.

To prevent slow-speed sync, select the [7Custom Functions (C.Fn)] menu’s [Flash sync. speed in Av mode] (p.154) and set it to [1: 1/ 200sec. (fixed)].

Depth-of-Field PreviewN

Press the depth-of-field preview button to stop down to the current aperture setting. You can check the depth of field (range of acceptable focus) through the viewfinder.

If it is difficult to discern the depth of field, first set the lowest f-number. Then hold down the depth-of-field preview button and look through the viewfinder while turning the <6> dial to the right. As the aperture gets smaller, you can see how the depth of field increases.

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Canon EOS 450D instruction manual Using the Built-in Flash, Depth-of-Field PreviewN
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EOS 450D specifications

The Canon EOS 450D, also known as the Rebel XSi in North America, is a DSLR that made its debut in early 2008. Positioned as an entry-level digital SLR, the EOS 450D was designed to cater to both photography enthusiasts and beginners looking to elevate their skills.

One of the standout features of the Canon EOS 450D is its 12.2-megapixel APS-C-sized CMOS sensor, which provides an impressive resolution for capturing high-quality images. This sensor allows photographers to print large formats and crop images significantly without losing detail. Coupled with Canon’s DIGIC III image processor, the camera delivers excellent performance in terms of image quality, noise reduction, and overall responsiveness.

The camera offers a robust ISO range of 100 to 1600, expandable to 3200, allowing for flexibility in various lighting conditions. Its nine autofocus points provide fast and accurate focusing, essential for capturing action shots and ensuring sharp images. The 450D also features a 3-inch LCD monitor, which is user-friendly and allows for easy navigation through menus and settings.

In terms of shooting capabilities, the EOS 450D supports continuous shooting at around 3.5 frames per second, making it suitable for capturing dynamic scenes. Additionally, the camera includes a variety of picture styles, enabling users to customize their images based on the desired effect.

For those interested in advanced photography techniques, the EOS 450D includes a range of exposure modes, including manual, aperture priority, shutter priority, and program mode. The camera also features built-in digital photo features such as automatic exposure compensation, which helps in achieving optimal results.

The build quality of the 450D is commendable for its class, featuring a comfortable grip and lightweight polycarbonate body, which enhances portability. Moreover, the camera supports a wide range of interchangeable lenses, allowing users to explore different photography styles and subjects.

Overall, the Canon EOS 450D stands out for its combination of user-friendly features, image quality, and solid performance. It remains a popular choice for amateur photographers looking to grow their skills and experience the world of DSLR photography. With its blend of technology and practicality, the EOS 450D has cemented its place in the hearts of many photography enthusiasts.
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