「Photo B Timer」can let you count desired shutter time by measured value of camera while taking night view by Digital SLR camera.
Moreover, it feature countdown reminding function that make you wont miss any moment.
Most Digital SLR suppose to offer 30 second shutter time, However ,
You may confused by unstable shutter time when switching into manual B shutter if 30 second passed.
Dont worry !
「Photo B Timer」would solve all of your problem at incorrect shutter time by accurately countdown fuction.
Lets make night photo amazingly.