Quote Originally Posted by StoneNYC View Post
It functions but only at 1/400 so it's only good if it fails in your studio, where you have the most likelihood of having batteries accessible... not very smart, They should have made it so you can use it with Bulb at least....
Sorry Stone, the RB67 doesn't use a battery at all.

Some of the accessory metering finders do use a battery.

I think you are thinking of the RZ67.