What a nice collection! Wow
that first one is special,,, let's see more of that! Infinity focus,,, ? 
thanks! i modified it so that it can be focused all the way to infinity while on a camera. unfortunately, the internals do not have much room for me to modify and i am already at the edge of the lens' adjuster for infinity focus
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to make the story short, i am 1.5mm short to achieve infinity focus
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i will attempt it again this summer
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maybe i can get some new ideas...
many people regard the 2nd one to be the best at 1:1 but to be honest, it's pretty hard to tell which one is best because the results look very much alike.