Review on Sony A1 A7S III A9 II A6300 A6400 A6500 A6600 A7 II A7 III A7R IV A7R III A7R II A7R 📷 A7S A7S II A9 A99 II A77 II RX1 RX1R II RX10 V IV Hot Shoe Cover Cap with Bubble Level, from Foto&Tech by Jeff Sorensen

I rent out a property and this little guy does a GREAT job. For some reason the bubble level in my tripod is not accurate. So I mount it on a hot shoe on top of my Sony a6000 and can make sure my shots are level so any vertical lines in the frame don't move around the edges of the scene. The only downside is that once you get addicted to it, you have to get other gear purchases right. For example, the Yongnuo YN-560TX Trigger hangs directly in the air without a second flash shoe on top. I use wireless flash a lot so I had to install a trigger which allowed me to mount this thing on an extra hot shoe on top of the trigger. Both the Godox R2 and Yongnuo RF-603 series have this feature, so I'm back in business.