I use one side of a set of binoculars backwards with cardboard with a hole for ONLY one eyepiece.
The eye piece is aimed at the sun.

The image cones out of the objectives of the binocular and is easily focused on white paper.

The cardboard creates a nice shadow area that the image can be focused onto plain paper and seen without damage.

DO NOT LOOK THROUGH ANY LENS SYSTEM AT THE SUN.
THE DAMAGE IS INSTANT.

My 10 x 42 set makes an image more than one inch across.

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