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General Photography
Wild Life
500mm f/8 Reflex Nikkor
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<blockquote data-quote="STM" data-source="post: 759033" data-attributes="member: 12827"><p><span style="color: #333333">If you are going to do astrophotography, it is always best to use a <em>Bahtinov mask</em> and focus on a bright star like Sirius or Betelgeuse (yes that really is a star, it is in the Constellation Orion). You can get them online or there is a guy on Ebay that can custom 3D print one for you. They are <em>extremely</em> precise. </span></p><p><span style="color: #333333"></span></p><p><span style="color: #333333">Here is one of his auctions:</span></p><p><span style="color: #333333"></span></p><p><span style="color: #333333"></span><a href="https://www.ebay.com/itm/284032719900?_trkparms=ispr%3D1&hash=item4221ab5c1c:g:I7cAAOSwO7dfd-Pa&amdata=enc%3AAQAFAAACgBaobrjLl8XobRIiIML1V4Imu%252Fn%252BzU5L90Z278x5ickk7PdDazAlGltMLJlUhrWsD87T7obnN7e3aoVDjnh1kTPFz7gkZOM2fHqgLEcjisRk3gU86dEU578AVJGFom6F%252BVpskQ1f1J89Kye7qH%252FwZ8gJuXKY3eqkIt6dXs9uVSoviuK875cJYFuZFst9e5OQpximjqgtctsvgETxihCMpT%252FUyPbjvn9xif43RnvzAsStyEQ2EGKD6pA7%252BeQf5qTXARwg%252Bva6uFUNW9RTyBKyzJkBbKiXjc%252Bw4FlvclbuXDGni%252BzWE9UWJOTpEPahC%252FYezMSVJMdXwQULHxeyVNYc5b1s8n0R2Mo0UpYlHjoyio4Y9e5LCQkQU41znenv1CNCkhHZLxPCICCyA45FcY%252B2VfC53WKiEBB8by5sRslG9eiEWdX5jS%252B1MPmAg8TMhnrcbPUz5R67c621zF1PutlYiEk96X8cSyvrU9QFHm6spBc3E88VOK75ACqSjq%252FFzxVPIH%252BoUXz8fIhOqvMpWQRC74Lbj%252FtY8S3bL5QzgLXYjc%252FngOD2H70mZRcBpOMfypDGBr39KNJfJr2gFB%252Fcpq5eZk6TzgBoZ6IWzEGVaCuIkQigqYPMpyGMnTlhLvx6x1wbcDTZX5IUeQNQly4BMVbXzQMVL64vKkf9HcvVKj2DzkGkWZFf8QTYi08s7Wh4sqI8gZqxqWx1kyMbUyIIpqVcoYww46%252BbQKgdjGjaL%252Bl9zEkIo9E6FclaJCVcVRPY%252BwF1RE8KnUXLrj3bdUxGrHbwDYxKVGNLtUAlhWVhLOdO%252F%252FjDnVFqRjVUZIXGw18YAHxB%252BR0N9bj3B4DSZ5qOYtaf6%252Fc%253D%7Ccksum%3A284032719900a11960fefcd545949cba798d6efad1ee%7Campid%3APL_CLK%7Cclp%3A2334524" target="_blank">77mm Camera Lense Bahtinov Focus Mask | eBay</a></p></blockquote><p></p>
[QUOTE="STM, post: 759033, member: 12827"] [COLOR=#333333]If you are going to do astrophotography, it is always best to use a [I]Bahtinov mask[/I] and focus on a bright star like Sirius or Betelgeuse (yes that really is a star, it is in the Constellation Orion). You can get them online or there is a guy on Ebay that can custom 3D print one for you. They are [I]extremely[/I] precise. Here is one of his auctions: [/COLOR][URL="https://www.ebay.com/itm/284032719900?_trkparms=ispr%3D1&hash=item4221ab5c1c:g:I7cAAOSwO7dfd-Pa&amdata=enc%3AAQAFAAACgBaobrjLl8XobRIiIML1V4Imu%252Fn%252BzU5L90Z278x5ickk7PdDazAlGltMLJlUhrWsD87T7obnN7e3aoVDjnh1kTPFz7gkZOM2fHqgLEcjisRk3gU86dEU578AVJGFom6F%252BVpskQ1f1J89Kye7qH%252FwZ8gJuXKY3eqkIt6dXs9uVSoviuK875cJYFuZFst9e5OQpximjqgtctsvgETxihCMpT%252FUyPbjvn9xif43RnvzAsStyEQ2EGKD6pA7%252BeQf5qTXARwg%252Bva6uFUNW9RTyBKyzJkBbKiXjc%252Bw4FlvclbuXDGni%252BzWE9UWJOTpEPahC%252FYezMSVJMdXwQULHxeyVNYc5b1s8n0R2Mo0UpYlHjoyio4Y9e5LCQkQU41znenv1CNCkhHZLxPCICCyA45FcY%252B2VfC53WKiEBB8by5sRslG9eiEWdX5jS%252B1MPmAg8TMhnrcbPUz5R67c621zF1PutlYiEk96X8cSyvrU9QFHm6spBc3E88VOK75ACqSjq%252FFzxVPIH%252BoUXz8fIhOqvMpWQRC74Lbj%252FtY8S3bL5QzgLXYjc%252FngOD2H70mZRcBpOMfypDGBr39KNJfJr2gFB%252Fcpq5eZk6TzgBoZ6IWzEGVaCuIkQigqYPMpyGMnTlhLvx6x1wbcDTZX5IUeQNQly4BMVbXzQMVL64vKkf9HcvVKj2DzkGkWZFf8QTYi08s7Wh4sqI8gZqxqWx1kyMbUyIIpqVcoYww46%252BbQKgdjGjaL%252Bl9zEkIo9E6FclaJCVcVRPY%252BwF1RE8KnUXLrj3bdUxGrHbwDYxKVGNLtUAlhWVhLOdO%252F%252FjDnVFqRjVUZIXGw18YAHxB%252BR0N9bj3B4DSZ5qOYtaf6%252Fc%253D%7Ccksum%3A284032719900a11960fefcd545949cba798d6efad1ee%7Campid%3APL_CLK%7Cclp%3A2334524"]77mm Camera Lense Bahtinov Focus Mask | eBay[/URL] [/QUOTE]
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