This is a collection of assorted astronomy related parts
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astro-parts/Lens Mount/Rokinon_16mm_ED_AS_UMC_Vixe...

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/*
* Astro Parts -- ASI178MC on Vixen Dovetail Plate
*
* Copyright (c) 2021 Steve Cross <flip@foxhollow.cc>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
include <_split_ring.scad>;
// This is designed for Rokinon 16mm ED AS UMC CS lens for Canon EOS
// mount with standard bar offset (as defined by the EOS 60D and EOS
// 600D measurements)...
// This lens has a has a 80mm diameter and is round when measured near the
// objective lens
mounting_point_diameter = 80;
// The camera allows for 13mm mounting width, but this doesn't provide enough
// room for a 1/4" nut, so we need to make it a little wider and it can just
// hang over a bit
ring_w = 15;
// This is standard for a vixen dovetail plate
dovetail_width = 35;