Brilliant thrower… Enderman i have bought the same lens which you used in light canon 1… But it is not focusing the light projecting too much aberrations…instead i have used small Collimator lens 23mm which concentrates the light onto the second biconvex lens… By this time the biconvex lens is thin and of longer FL… I am unable to buy the optolife lenses which you used in optofire… But by this technique i have confirmed 859 meters… This two lenses technique is good and what if i use thick biconvex lens of 26mm same thickness which you used in optofire?.. Plz help…