How focal length and aperture affect focus range Depth of field

Depth of field, the range of sharpness in front of and behind the subject on which focus has been set, is best understood by examining the photographs below. When the majority of subjects appear sharp in a picture, the depth of field is great when they appear sharp within a narrow range, the depth of field is small. Depth of field varies according to the focal length and brightness of the lens used and the distance from which the picture is taken.

Compress space draw distant subjects in close with telephoto lenses

Meet the 100mm, 135mm, 200mm, and 300mm telephoto lenses. The 100mm lens is especially suited for natural-looking portraits and people photography. With its slightly longer focal length, the 135mm easily frames the features you want to emphasize. The 200mm and 300mm lenses provide a much narrower angle of view. They can single out subjects not easily resolved by the human eye, and their ability to compress space results in a pronounced telephoto effect. This makes them the best lenses for...

Wide angles for an exaggerated sense of depth telephotos for flatness Perspective

Field or angle of view is not the only thing a photographer has to consider. Perspective, or the sense of depth, controls the spatial relationship between one subject and another. In the pictures below each focal length tells a different story. At 28mm, 50mm, 100mm, and 200mm, the camera was moved so that the subject's size remains the same in the images. The differences arise in the background. It seems to go on forever when a 28mm wide angle is used, but looks very close to the subject when...

Power Winder A

You won't miss another shot with a Canon power winder attached to your SLR. This accessory has become essential for sports, wildlife, and fashion photographers. The power winder is compact, easily mounted, and increases your versatility especially when used together with a zoom lens. The Canon Power Winder A2 (for A series SLR cameras) automatically advances the film at a rate of approximately two frames per second as long as the shutter button is held down. When a roll of film has been...

Nearing Human vision or surpassing it the interchangeable lens

The human eye is the all-purpose lens it focuses precisely on whatever it chooses. Interchangeable lenses make it possible for the photographer to come close to duplicating even surpassing this capability. That's why Canon provides almost 60 different inter-changeable lenses for just as many different applications. Standard lenses give a natural-looking perspective which closely approximates human vision. These have large apertures, which make photography in dimly lit rooms as well as low-light...

Portrait Zoom

Indirect Lighting Photography

Approach even the dauntless with a telephoto lens. The four key points to better portraits are 1 use a telephoto lens, 2 blur the background, 3 place your subject in flattering lighting, and 4 focus on your subject's eyes. Using a focal length of 85mm or 100mm results in more natural-looking portraits also, your subject feels more comfortable since you don't have to stand directly in front of him or her. Focus carefully on the eyes, the most revealing part of a person's face. Open the lens...

Data Back A

Canon Data Back

This accessory has numerous applications, from scientific to commemorative photography. The Data Back A makes it possible to record information such as the day, month, and year directly on the film the moment the picture is taken it can be used with the A-1, AE-1 PROGRAM, and AE-1. Easily installed in place of the camera's regular back cover, its three dials can be set to automatically record a maximum of six numerals or characters. Manual recording is also possible.

Wide Shots

24mm Lens Pictures

Exaggerate perspective with wide-angle lenses. The foremost feature of the 24mm, 28mm, and 35mm family of wide-angle lenses is their broad field of view. With a 28mm lens, the amount of area included in the image is 2.5x that of a 50mm lens with a 24mm lens, it is 3x. This is decidedly useful for scenery shots or for indoor photography. And since wide-angles also provide an exaggerated sense of depth, they can be used to alter the appearance of foregrounds or, when held at high or low angles,...

Auto Bellows

The Auto bellows, a high-performance accessory, forms the nucleus of Canon's close-up, macro, and copying systems. Used with lenses including a standard 50mm and other close-up accessories, it is capable of providing continuously variable magnifications within a fixed range. Also, when used with a double cable release, there is no need for manual aperture setting. Bellows length can be varied from 39mm to 175mm for magnifications ranging from 0.75 to 3.9x with a 50mm macro lens. Magnifications...

Variextension Tube MM

These extension tubes feature adjustable lengths, simplifying focusing and magnification changes during close-up or macrophotography work. The M15-25's tube length can be adjusted from 15mm to 25mm the M30-55's length can be adjusted from 30mm to 55mm. The former provides magnifications ranging from about 0.3 to 1x when used with a 50mm standard lens, and the range of magnifications provided by the M30-55 is 0.6 to 1.2x. When a close-up lens is used, magnification is 0.5 to 0.8x with the M15-25...