The Byomic Universal DSLR Camera Adapter for Microscope enables you to connect your DSLR camera to the microscope so you can take pictures of your objects. To be able to take pictures with this adapter you need a T2 adapter ring that fits to your camera. These T2 adapter rings are sold separately Click here for the available T2 adapter rings. You connect the DSLR camera without a lens to the T-2 adapter ring. Then you screw the T-2 adapter ring to the camera adapter, so You can place the adapter into a tube from which you temporarily pull out the eyepiece. Der adapter is suitable for tubes with an diameter of 23 mm.