A simple adapter can install the red dot sight (from my telescope) on the hot shoe of the camera.

请注意尺寸（我对望远镜相关的设备不是很了解，还请自行测量）

The size of each person's red dot sight may be different, so please first measure the connector width of your red dot sight and compare it with the size in the figure above. If the size is inconsistent, you can modify the. STEP file below to a suitable size.