| Simple Sun Finder |
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| Solar Imaging - Solar |
| Saturday, 13 February 2010 13:55 |
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Its surprising how hard it can be to point a telscope at the sun. Here is a simple sol finder that I made for just s few cents. Once I fitted this I can zoom straight to the sun every time.
To make my sun finder I simply used a small plastic container upside down without a lid. Its a few centimeters square. I put a small 1/16 inch hole in the middle of the front panel and a 1 inch hole in the back. On the back hole I covered it with masking tape. The Sun shines through the small hole in the front and shows as a small spot on the masking tape on the back. That's all that is required really. However you need it to align the same way every time you fit it to the scope or it would be useless. This was easilly overcome. OK this is a small box without a lid, upside down. So at the front and back all I did was cut away about 1/4" of the plastic so it clears the curvature of the scope tube. That's it. Now when I sit it on the scope, the sides that I did not cut will automatically allign it along the tube. I just use a rubber band to hold it on. Now the first time you fit it you still have to manually find the sun. But once you have it in the centre of the viewfinder, mark the position of the spot on the masking tape. It will then just be a matter of moving the sun to that spot every time. Also if you make the hole at the back bigger (it does not even have to be round) it makes it easier to find the sun as it gives you a bigger screen to project the sun spot onto. |





