Round shaped slide viewer for building it into round tubes or very small enclosures. 

Particularly suitable to apply in a presentation that gives the impression that one is looking through (old-fashioned) binoculars, periscope or stargazer. A modified slide frame is placed in the viewer to achieve this small diameter housing.

General characteristics:

- Outer diameter: 62 mm.
- Installation depth including terminal block for electricity: 60 mm. Without terminal block 45 mm.
- Focal point of the lens: 60mm. (4.2x magnification)
- Materials: stainless steel lens holder, aluminum housing, electricity and slide holder 3D printed plastic.
- Slide frame: RBT cut to 41x41mm. maximum image 23x33mm.
- Lighting: 3Vdc 25mA. or with resistor 5Vdc 25mA