Precautions for using close-up lens:
1. Lenses with a focal length exceeding 300mm are not recommended. The focal length is too long and the depth of field is extremely shallow, making it difficult to focus.
2. A close-up lens is not recommended for lenses with a focal length of 55mm or less, because the lens resolution is low and the effect is not obvious
3. For large zoom lenses (such as 18-200mm), it is recommended to choose a short focal length close-up lens to significantly shorten the focusing distance and increase the magnification.
4. The main lens has excellent imaging(Such as Canon 70-200mm f/2.8)It is recommended that a close-up lens with a longer focal length has sufficient focusing range.
5. Smaller aperture (shrink the aperture more than 3 stops) + ring flash + highest sync speed + tripod + shutter release greatly increase the success rate.
![](https://img.alicdn.com/imgextra/i4/827322939/TB23UmlarZnBKNjSZFGXXbt3FXa_!!827322939.jpg)