Canon 550D About Zooming, To zoom, turn the zoom ring on the lens with your fingers

Attaching and Detaching a Lens

About Zooming

To zoom, turn the zoom ring on the lens with your fingers.

If you want to zoom, do it before focusing. Turning the zoom ring after achieving focus may throw off the focus slightly.

Detaching the Lens

While pressing the lens release button, turn the lens as shown by the arrows.

Turn the lens until it stops, then detach it.

Attach the rear lens cap to the detached lens.

Do not look at the sun directly through any lens. Doing so may cause loss of vision.

If the front part (focusing ring) of the lens rotates during autofocusing, do not touch the rotating part.

Image Conversion Factor

Since the image sensor size is smaller than the 35mm film format, it will look like the lens focal length is increased by 1.6x.

Image sensor size

(22.3 x 14.9 mm / 0.88 x 0.59 in.)

35mm image size

(36 x 24 mm / 1.42 x 0.94 in.)

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