Geelong Region Weather Map

Welcome to Bill D's corner of the net

This website will cover some of my hobbies.  I have been into 3D modelling and rendering, attempted to fly radio controlled helicopters, and even played around with robotics. Nowadays I am into Astro Photography. As it turns out this is my most expensive hobby yet. Having said that I enjoy it alot as it is also one of the most challenging. 

Home Solar Observing Solar Simple Sun Finder
Simple Sun Finder
Simple Sun Finder PDF Print E-mail
User Rating: / 1
PoorBest 
Solar Imaging - Solar
Saturday, 13 February 2010 13:55

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.

All that is needed to constantly find the sun every time is to have something that you can fit to the solar scope that will always align itself to the scope and will then cast a s shadow or a spot in the same place every time. The image on the left shows the back of my home made finder.

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.