Polarscope 90 degree view finder

[Dave_D]

Just completed this addition to my AZ EQ6-GT polar scope so i won't be breaking my back when i eventually get to use the scope again. I got a practically 'as new' 90 degree Canon viewfinder for the princely sum of £10 off fleabay. I saw a couple of adaptors for the star adventurer on thingiverse, but this one is specifically for the EQ and is just a one piece 3D print.  The adaptor is a very snug push fit (created in OpenSCAD) onto the focusing ring and the fixed body of the polar scope and has just enough freedom to allow it to be rotated for focusing. I stuck the metal bracket from the camera shoe (? i think thats what it is) and fixed it to the plastic adaptor with double sided tape and then heated the 4 screws from the (camera shoe) and screwed them in. It seems plenty sturdy enough. 

Mega complex openscad model lolol

difference()
{
    union()
    {
        translate([0,0,28])
        cylinder($fn = 200, h = 3, d1 = 42, d2 = 42, center = false);

        difference()
        {
            cylinder($fn = 200, h = 31, d1 = 38.5, d2 = 39, center = false);
            cylinder($fn = 200, h = 29, d1 = 29.3, d2 = 29.8, center = false);
        }
    }

    translate([0,-0.5,0])
    cylinder($fn = 200, h = 40, d1 = 12.33, d2 = 12.33, center = false);

    translate([0,21,0])
    cylinder($fn = 200, h = 40, d1 = 3, d2 = 3, center = false);

cube(size = [50, 1, 50], center = true);
}

overall, it works a treat

[Dave_D]