Question about Puluz Portable Photo Studio

The walls are fixed. However, there is an opening at the top. It is designed for a lens, but it is possible to put your hand through it.

No, there is no possibility of opening another side. However, the centre of the lighting circle on the upper part can be opened to allow a lens to pass through, and possibly a small hand. We'll have to see and try if this can be a solution.

It only has one open side.