Review on 📷 Enhanced Camera Level Hot Shoe Bubble Cover for Sony A6000 A6300 Nikon Panasonic – Combo Pack with Standard Shoe Mount [2 Axis and 1 Axis] by Jason Daves

Not sure I will be using them. They fit on the flash mount. They are accurate enough for a camera. I bought a tripod with 3 levels, but that might come in handy. I have grid enabled on my camera so I don't really need it. But for the price, it can be worth having a cheap camera and others in your pocket. As for some of the other reviews. It's a little strange that all the bubbles are the same in the picture. The table they were standing on was uneven. You don't build walls with these planes, you just use them when the ultra wide angle lens shows everything that is at infinity. If you don't have tripod level then this might be what you need.