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Re: building a parabolic with mirrors.
well I stated testing the focal length some mirrors.
for test I have
12 X 12
6X6
4X4
2X2
1X1
I only got to run a few tests then the clouds rolled in
I placed a mirror at each distance at the same time and lined up the reflection side by side so I could compair each of them
2x2 test
12 feet full on blur
9 feet blur
7.5 a little blur around the edge
6 feet sharper
3 feet sharp and clear
2 feet very clear
Im sure some ninja has already come up with a forumal, I just have not one yet.
if the sun comes out again i will get some run. I want to try 2.5 and 1 foot
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