| 1. | The unsteadiness of air becomes prohibitive only if instruments with large focal length are used .
只有在使用长焦距的仪器时，才不允许空气的不稳定。 |
| 2. | Effect of temperature on measuring system of long focal length
温度对长焦距测量精度的影响 |
| 3. | Discussion about off - focus influence on mtf for long focus aerial camera
长焦距航天遥感相机离焦对传递函数的影响 |
| 4. | This is a long focus lens
这是个长焦距镜头。 |
| 5. | Long focal lengh lenses
长焦距镜头 |
| 6. | Connecting the camera to the telescope with a suitable adaptor enables the telescope to become a long telephoto lens
直接焦点法将摄影机接驳在一支望远镜后，把望远镜作为一支长焦距镜头使用。 |
| 7. | Taking photographs of these small deep sky objects require a lens of longer focal length , sometimes a telescope is used instead
拍摄这些细小的深空天体，必须用较长焦距镜头，甚至要用一支望远镜作为镜头。 |
| 8. | Correct under the guiding of route , we successfully design and have trial - produced the one kind of new long large - scale camera of focal distance
在正确路线的指引下，我们成功地设计和试制了一种新型长焦距大型照相机。 |
| 9. | However , during a total solar eclipse , when the sun is fully blocked by the moon , you can photograph it with a telephoto lens or even a telescope
但在日全食出现时，即太阳完全被月球遮盖著，则可利用长焦距镜头或望远镜进行拍摄。 |
| 10. | The choice of lens depends on the size and brightness of the celestial body photographed . lenses ranging from fisheye to super telephoto can all be used
镜头的选择视乎所拍摄天体的范围大小与光暗而定，鱼眼镜头乃至超长焦距镜头都可派上用场。 |
