Quote:
Originally Posted by Inmykombi
Hi Terry, how did you measure the FL ?
Can you explain so I can do the same.
geoffro.
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Using a tape measure and the moon.
I held the tape meaure against the side of the FR and projected an image of the moon onto a piece of paper on the ground. The distance from the reducer and the focussed image of the moon is the FL.
simple but does require the moon to be out.
I wouldn't try it with the sun as the image is quite bright and you will fry things.
Cheers
Terry