The video camera runs off of a 9vdc battery that's stored in the camera housing. F.L. Barrel Dia. Orthoscopic Eyepiece Made in Japan by Vixen. Highly Recommended by Dr. Donald C. Parker. All are 23mm O.D. to fit international standard tubes.
Eyepieces are Fully Coated.
On Plastic Cases. Ideal for eyepiece projection photography. Made from Black Anidized Aluminum and will fit almost any size tube. Eyepieces by adding a little felt. Will fit almost any size tube.