Photos taken in low light or with long telephoto lenses can easily be ruined by blur caused by the camera moving during the exposure (camera shake).

光线不好、或者使用长焦拍摄，由于需要长时间的曝光，相机的抖动很容易让照片糊掉。

youdao

One limiting factor is the viewing Angle, which is comparable to using a camera lens: a telephoto lens has a narrower view than a wide-angle lens.

限制因素之一就是观察角度，这与使用照相机的情况类似：长焦镜头的视野比广角镜头的观察角度要窄得多。

youdao

Then there is the camera, the telephoto lens, and the cellphone with a camera.

然后就是相机、长焦镜头、带摄像头的手机。

youdao

It's lazy man's game viewing at its best, although you do go farther afield on game drives, where you're armed with a Canon 40D digital camera and a pair of telephoto lenses, about the coolest game-lodge amenity I've ever come across.

FORBES: Lifestyle Feature

With CMOS shift-type image stabilization and DUAL IS for high-sensitivity shooting, camera shake is effectively reduced during telephoto shooting.

ENGADGET: Olympus introduces Stylus SP-820UZ, SP-720UZ cameras and SZ-14 binocular bundle

As a result, the PENTAX Q10 produces sharp, blur-free images even under demanding conditions that are prone to camera shake, such as use with a telephoto lens or shooting in low-light without flash.

ENGADGET: Pentax offers 100 different custom color options for its Q10 mirrorless camera