Yes, the light is adjustable from off to full light, you can turn it off when the environment is bright enough. 

Oh, no. It is not a macro lens. Thanks for your kind asking. 

My son, 11 years old, can take a clear photo. 

Dear Customer, Thank you for your question. Please check the following steps to setting the focus: (Do not look at too close objects) Step 1. Cover the right objective lens with your hand or close your right eye, rotate the central independent focusing wheel until the image in the left eyepiece is sharp and clear. Step 2. Now cover the left objective lens or close your left eye, rotate the right eyepiece focusing wheel to adjust the diopter of the right eye until the captured image is sharp. 

i very much doubt it... it's worth risking your sensor and or your eyes...